Airscrew Adjustment to fix off-idle stumble and Throttle Body Sync - w/ pigtails

[yamadad]

Well, I read this entire thread and ran it past my buddy who is a long time professional motorcycle mechanic and pro tuner/wrencher. He said turning out the air screw to the 3/4 position will lean out the mixture too much and recommended to not do it. I took the bike into his shop and we fiddled around with it just to see. First we checked the synq and it was close, but off. Then we tried to balance the injectors as had been stated in this thread. Left side out 3/4 and then balance off of the right side. It ran horrible and wouldn't synq properly. He said it was wayyyy too lean and could possibly cause damage to the engine. We then put the left side screw back to the original position and then just did the balancing the normal way. It came into perfect balance (he had some kind of digital device that I hadn't seen before because he used to use mercury sticks). It settled into a nice idle and ran much cleaner. So what that tells me is that with only 2 FI pots balancing is critical to how it runs. ::022::


(I wrote left side first, when I meant to write right side with the white paint first. I'm leaving the posting for sake of clarity.)

 

[fredz43]

Well, that is interesting. First off the normal reference TB is the right one, but I don't see how it would make much difference which one is used for reference. The right one is the one that is normally all the way closed from the factory and that is the one that many have turned out 3/4 turn, just as the euro models come from the factory, and then balanced the left one to sync them. How did he determine that it was way too lean? If it would damage the engine that way, how long will that take? I ask, because mine has been running very well that way for over 29,000 miles.

 

[tubebender]

I find that odd too.
I've adjusted 5 CA bikes and every one has noticed an improvement.
Was the air sensor on the left side t-ed into the sync tool? If it wasn't the engine would run rough.
In fact, our CA bikes show that without this adjustment the intake vacuum is at the bottom or below minimum spec.
These are just bypass air screws after all and fueling is relying on intake pressure, air temp, and rpm.

 

[yamadad]

Yes, he did "T" it off. He made the suggestion about being too lean by ear (no exhaust gas analyzer). We both could hear it stumbling badly. It sounded like a Hardly and not a Yama, it was horrible. It's not rocket science at that point to determine harm would result.

As far as the Euro spec bikes go, it is very common to have different maps between different markets and would seem logical Yamaha would do that too. It's not hard for them to do it and is very common, since every bureaucrat worldwide seems to know more and better than every other bureaucrat. ::009::

The screw is an air screw and I did not do anything by way of the CO mod. This would seem to be necessary as a way of introducing more fuel while adding more air via the air screw. Of course, a reflash is the better way to go or better yet is the PC V with auto tune.

If the mod works for anyone ::018::

It's just not for me. ::019::

 

[avc8130]

Yes, he did "T" it off. He made the suggestion about being too lean by ear (no exhaust gas analyzer). We both could hear it stumbling badly. It sounded like a Hardly and not a Yama, it was horrible. It's not rocket science at that point to determine harm would result.

As far as the Euro spec bikes go, it is very common to have different maps between different markets and would seem logical Yamaha would do that too. It's not hard for them to do it and is very common, since every bureaucrat worldwide seems to know more and better than every other bureaucrat. ::009::

The screw is an air screw and I did not do anything by way of the CO mod. This would seem to be necessary as a way of introducing more fuel while adding more air via the air screw. Of course, a reflash is the better way to go or better yet is the PC V with auto tune.

If the mod works for anyone ::018::

It's just not for me. ::019::

Give me a minute, I'll compare EU vs US fuel maps.

Nope, same.

ac

 

[fredz43]

Yes, he did "T" it off. He made the suggestion about being too lean by ear (no exhaust gas analyzer). We both could hear it stumbling badly. It sounded like a Hardly and not a Yama, it was horrible. It's not rocket science at that point to determine harm would result.

As far as the Euro spec bikes go, it is very common to have different maps between different markets and would seem logical Yamaha would do that too. It's not hard for them to do it and is very common, since every bureaucrat worldwide seems to know more and better than every other bureaucrat. ::009::

The screw is an air screw and I did not do anything by way of the CO mod. This would seem to be necessary as a way of introducing more fuel while adding more air via the air screw. Of course, a reflash is the better way to go or better yet is the PC V with auto tune.

If the mod works for anyone ::018::

It's just not for me. ::019::

I still say there is something out of the ordinary with the process your mech did. I say this because many, many have done the 3/4 turn TBS with good results and certainly no ill effects. Going by ear to determine that an engine is too lean is a stretch. Also if you open the screws a bit and then balance the TB's you do not need to touch the CO. You can experiment if you wish, but it is not necessary. I say this from first hand experimenting over 2 years and over 29,000 miles. . Many owners have many thousands of miles on their Super Tens after balancing TB's with varying degrees of the screw openings and no ill BTW the Euro and US fuel maps are the same, per AC, who has a lot of experience working with Super Tenere fuel maps. Also you say that a PCV with auto tune is better than the Gen 2 flash, but you have no basis for that conjecture, just your opinion.

Welcome to the forum and to Super Tenere ownership, but I think that you may learn that many owners have been thru quite a bit and learned quite a bit in over 2 years of ownership and all that seems evident to you may not be as it seems.

 

[yamadad]

I still say there is something out of the ordinary with the process your mech did. I say this because many, many have done the 3/4 turn TBS with good results and certainly no ill effects. Going by ear to determine that an engine is too lean is a stretch. Also if you open the screws a bit and then balance the TB's you do not need to touch the CO. You can experiment if you wish, but it is not necessary. I say this from first hand experimenting over 2 years and over 29,000 miles. . Many owners have many thousands of miles on their Super Tens after balancing TB's with varying degrees of the screw openings and no ill BTW the Euro and US fuel maps are the same, per AC, who has a lot of experience working with Super Tenere fuel maps. Also you say that a PCV with auto tune is better than the Gen 2 flash, but you have no basis for that conjecture, just your opinion.

Welcome to the forum and to Super Tenere ownership, but I think that you may learn that many owners have been thru quite a bit and learned quite a bit in over 2 years of ownership and all that seems evident to you may not be as it seems.

Wow, lots of negative waves there. ::016::

If it works for you or yours buddies. Great. It's not for me or my bike. I tried it, just like this thread suggested (I amended my original posting for a mis-typing) and it didn't work FOR ME.

Like I said when the bike is loping and won't hold an idle, it ain't rocket science at that point. My friend not not an amateur, he's a pro tuner and mechanic with over 30 years of track and real world experience. And, this ain't my first rodeo either. I've been riding and turning wrenches since before Al Gore invented the Internet. And, please don't try to tell me the gen 2 flash is better than a PC V with auto tune because that's just plain ignorance.

::021::

 

[fredz43]

Wow, lots of negative waves there. ::016::
And, please don't try to tell me the gen 2 flash is better than a PC V with auto tune because that's just plain ignorance.

::021::

Well, speaking of ignorance, you can add all the PCV's and auto tunes you want and you will still have throttle body restrictions in the first 3 gears. So, in other words, you are ignorant of the fact that the TB's do not open all the way in the first 3 gears without the flash.

Sorry for the negativity, an overreaction on my part. I'll just sit back and learn. Over and out.

 

[Dallara]

Wow, lots of negative waves there. ::016::

If it works for you or yours buddies. Great. It's not for me or my bike. I tried it, just like this thread suggested (I amended my original posting for a mis-typing) and it didn't work FOR ME.

Like I said when the bike is loping and won't hold an idle, it ain't rocket science at that point. My friend not not an amateur, he's a pro tuner and mechanic with over 30 years of track and real world experience. And, this ain't my first rodeo either. I've been riding and turning wrenches since before Al Gore invented the Internet. And, please don't try to tell me the gen 2 flash is better than a PC V with auto tune because that's just plain ignorance.

::021::

As Fred pointed out, lots of blatant ignorance in your post, and anything invoking Al Gore proves it.

You might want to learn a bit about modern FI systems, and especially the Super Tenere, before you accuse anyone here of being ignorant. And don't forget, if PCV's and AutoTune's were better than programming the ECU directly you'd see 'em hanging off everything from Honda and Yamaha's factory MotoGP bikes to AMA SuperCross mounts. Electronic fuel injection is always better served by direct programming than by band-aid external add-ons. Whenever you find a real mechanic and tuner he'll tell you this. Fred mentioned ECU re-flash/reprogramming can remove the throttle restrictions in the first three gears, but it can also alter throttle butterfly ramping rate, ignition timing, rev limiter threshold, and all sorts of other parameters, too. Your vaunted PCV and AutoTune can't do any of that.

In addition, you might want to check the CV's of some of the folks around here before you suggests they suffer from "ignorance", especially when it comes to riding, wrenching, or racing. The pool of expertise and experience is exceedingly wide and awfully deep here.

So skip the lectures on our ignorance, and get back to us when you understand all this a bit better.

Dallara



~

 

[yamadad]

As Fred pointed out, lots of blatant ignorance in your post, and anything invoking Al Gore proves it.

You might want to learn a bit about modern FI systems, and especially the Super Tenere, before you accuse anyone here of being ignorant. And don't forget, if PCV's and AutoTune's were better than programming the ECU directly you'd see 'em hanging off everything from Honda and Yamaha's factory MotoGP bikes to AMA SuperCross mounts. Electronic fuel injection is always better served by direct programming than by band-aid external add-ons. Whenever you find a real mechanic and tuner he'll tell you this. Fred mentioned ECU re-flash/reprogramming can remove the throttle restrictions in the first three gears, but it can also alter throttle butterfly ramping rate, ignition timing, rev limiter threshold, and all sorts of other parameters, too. Your vaunted PCV and AutoTune can't do any of that.

In addition, you might want to check the CV's of some of the folks around here before you suggests they suffer from "ignorance", especially when it comes to riding, wrenching, or racing. The pool of expertise and experience is exceedingly wide and awfully deep here.

So skip the lectures on our ignorance, and get back to us when you understand all this a bit better.

Dallara



~

From negativity to hostility. I thought these owner boards for sharing experiences both normal and abnormal. Hmm.

I seem to recall in reading this thread that several others have questioned it and asked for "proof" (which I never did) by way of exhaust gas analyzer results. My posting was a questioning the "science" behind this mod and to say that it did not work, AGAIN, for me.

I never posted that the flash 2 was bad or snake oil. In fact, I think it is a useful thing to do and may well do it on my bike. What I did say was that the ECU flash was not as good as a Power Commander V with the auto tune feature. The flash is a generic modification for all S10's with some minor tweaks that can not be undone. The PCV with AT is a micro processor that can alter the mapping and ignition curves for each cylinder in micro seconds on the fly as it reads the exhaust gases. It is commonly used on all sorts of track bikes including in SBK. So how am I wrong?

Oh and "invoking" Al Gore is now a commonly used Internet lexicon, like old as dirt, etc. It is a humorous expression that has become rather apolitical.

 

[Dallara]

From negativity to hostility. I thought these owner boards for sharing experiences both normal and abnormal. Hmm.

I seem to recall in reading this thread that several others have questioned it and asked for "proof" (which I never did) by way of exhaust gas analyzer results. My posting was a questioning the "science" behind this mod and to say that it did not work, AGAIN, for me.

I never posted that the flash 2 was bad or snake oil. In fact, I think it is a useful thing to do and may well do it on my bike. What I did say was that the ECU flash was not as good as a Power Commander V with the auto tune feature. The flash is a generic modification for all S10's with some minor tweaks that can not be undone. The PCV with AT is a micro processor that can alter the mapping and ignition curves for each cylinder in micro seconds on the fly as it reads the exhaust gases. It is commonly used on all sorts of track bikes including in SBK. So how am I wrong?

Oh and "invoking" Al Gore is now a commonly used Internet lexicon, like old as dirt, etc. It is a humorous expression that has become rather apolitical.

You might want to make note... I never questioned your decision not to use the air screw adjustment, etc. If it didn't work for you, fine, no problem.

My reply was strictly to address your claim that folks around suffered from "ignorance". Why is it you can insult members of the forum en masse and then expect everyone just to bow down to that crap. Seems like you're the one who started out with the negativity and outright hostility...

Nobody said that you ever stated that an ECU re-flash was "snake oil", either, but your prattling of "please don't try to tell me the gen 2 flash is better than a PC V with auto tune because that's just plain ignorance" is nothing more than inane, inexperienced, and uneducated supposition. You've clearly admitted that you have never had the re-flash in question, and from all evidence you don't have a PCV or AutoTune on your bike, either, so how the hell can you make such a ludicrous claim in the first place? Isn't not having the slightest idea of what you're talking about - in this case FI system modifications on the Yamaha Super Tenere - the true definition - i.e. lacking knowledge or awareness in general; uneducated or unsophisticated according to the dictionary - of blatant "ignorance"?

And no, there are currently *NO* AMA or WSBK machines using a PowerCommander, much less DynoJet's AutoTune. You'd know that if you even had a femto-inkling of the subject being discussed, or of higher level racing in general. And if your local mechanic/race tuner guru actually had much in the way of real race experience he would have told you that, too. Sure, there are some club level racers that use PCV's, and even AutoTune's, just like they sometimes use lots of other stuff that is often easier and simpler to implement than a true core solution, but you will never see a DynoJet PCV or AutoTune on the grid of a WSBK event.

Just because DynoJet is a both an event and series associate sponsor of the AMA/DMG Superbike series does not mean that anybody in the series actually uses them on their team bikes, any more than anyone in the series uses a Scala Rider intercom system, insures their race bikes with GEICO, wear Cortech mesh jackets, has joined the National Guard, tries to qualify a Kymco scooter, etc. (http://www.amaproracing.com/rr/partners/), so yes, Yamadad... You're wrong.

And no, again... Neither the PowerCommander V nor AutoTune for the Yamaha Super Tenere alters ignition timing. Yes, DynoJet makes some PCV's that can alter ignition timing, but they don't sell that kind of PCV for the Super Tenere, and the AutoTune only alters fuel delivery, so yes, Yamadad, you're wrong... Again. Don't believe me, look for yourself...

http://www.powercommander.com/powercommander/powercommanders.aspx?mk=28&mdl=118&yr=2012&pc=22-041&mk-n=Yamaha&mdl-n=XTZ1200&pc-ver=PCV&add-mdlyrid=22-041&add-mdlyrid2=22-041&fullstr=22-041&prod-type=Powercommander%20V

And while we're here, let's not forget that Yamaha's own stock ECU, as well as a re-flashed one, "can alter the mapping and ignition curves for each cylinder in micro seconds on the fly as it reads the exhaust gases" via the stock O2 sensors. While it only does this in the closed-loop section of the ECU mapping, it does it nonetheless, so nothing your hallowed DynoJet products do have anything on even the stock components as far as "microprocessor" capability. Get sucked into the ad hype if you wish, but don't think for a moment that anyone at DynoJet is more savvy about electronic fuel injection than the guys who design the factory OEM units. That's like saying the geeks at Alienware are more processor savvy than the chip designers at Intel or AMD.

And yes, invoking Al Gore and his internet invention faux pas is an old joke... So old and tired that it ceased to be even remotely humorous years and years ago. So much so that when somebody trots it out it only serves to make one laugh at the poster, instead of with him.

But your reference leads me to ask you a question, as I'm curious... If you have "been riding and turning wrenches since before Al Gore invented the Internet", then why on Earth would you need a "pro tuner and mechanic with over 30 years of track and real world experience" to do a simple, easy, elementary, uncomplicated, straightforward, painless throttle body synch or air bleed screw adjustment for you? It's not more difficult than an oil and filter change, and doesn't take much, if any, more time. Why would you need a pro's help if "this ain't my first rodeo either"?

"Ignorance" is a funny thing... You toss it out and think it's neither "negativity" nor demonstrates any "hostility" on your part, yet when it is clearly pointed out that it's only your own "ignorance" and lack of experience with this motorcycle that clouds your statements then somehow it's the rest of the world that's negative or hostile... Interesting.

Dallara



~

 

[longride]

Geez, I think yamadad's ass is going to be sore after that one!

 

[snakebitten]

I like Yamadad. Seems like a cool dude.

But, he teed that one up. It was gonna get swung at.
Too bad for him it was hit by one of the big-hitters.

 

[yamadad]

I'm only answering for the benefit of anyone else who might care or be interested, because frankly I'm growing bored with this whole thing.

Thanks for the kind words Snake.

Let's recap.

My original post was about my dissatisfaction with the air screw modification and how it yielded less than acceptable results on my bike. I asked some questions about the efficacy of this modification, as others before me have done. Those same questions have never been answered.

I exchange some dialog with other members who believe in this modification. Including, one member whose tone I interpreted as being rather negative toward me and my posting. I ended that post with a comment about a PC V with AT being a better choice than the Gen 2 flash and posit that it would be ignorant to claim otherwise. Not that this member is ignorant or an ignoramus. If he does not hold said opinion and I have misinterpreted his posting, then I public apologize to him. If I was being snarky or over the top, then I also apologize to him (Fred).

In steps Dallara with ad homin attacks on me and my character. Now I could understand the attacks if I were not an owner and merely a poster who steps into this forum and claims the S10 is a steaming pile and the mighty GSW is the uber bike to beat all others. I did not. I was merely questioning “the science” as you will behind the air screw mod. Again, those are the same questions that other members have asked in the past.

I made the assertion the PC V with AT is superior to the Gen 2 flash. I am not asserting the flash is bad, or as I put it snake oil. I assert the PC V with the AT is better. Dallara disagrees and again engages in ad homin attacks on me.

I'm not going to turn this thread into a Dynojet infomercial, so I'll let my comments stand.

Since Dallara likes to surf the web; Here's some web surfing.

The real link to the PC V with explanation about what it does:
http://www.powercommander.com/powercommander/Products/PowerCommanderV/powercommander_v.aspx

Link to race teams that use the PC:
http://www.powercommander.com/powercommander/About/powercommander_awards.aspx

A partial list of events and teams that use the Power Commander;

AMA / Pro Star National Drag Race Series
AMA Pro Racing - The US Super Bike Series
Padgett Racing Team Isle of Man SS Championship
Padgett Racing Team Isle of Man SBK Championship
Padgett Racing Team World SuperSport Winner
IDM Superbike Championship - Karl Muggeridge
Aluma-Lite Australian SBK Championship
Pat Clark Motorsports - Ben Bostrom
DNA Ducati
Aussie Dave Racing
Azza Racing (Australia)
LTD Racing
Team: Graves Yamaha Riders: Josh Herrin, Tommy Aquino
Jordan Szoke
Team: Graves Yamaha Riders: Ben Bostrom, Josh Herrin, Tommy Aquino
Geico Powersports - Danny Eslick
Team Monster/Emgo M4 Suzuki
Factory Kawasaki
Factory Yamaha
Attack Kawasaki
World Ducati Factory
Corona Honda Riders: Jake Holden, Matt Lynn
Former Champions
AMA SuperSport Champion (Factory Kawasaki / Roger Lee Hayden)
AMA Formula Extreme Champion (Factory HONDA / Josh Hayes )
AMA Formula Extreme Champion (Factory HONDA / Josh Hayes )
AMA SuperSport Champion (Factory Yamaha /Jamie Hacking)
AMA SuperStock Champion (Factory Yamaha /Jamie Hacking)
AMA Supersport Champion (Factory Kawasaki)
AMA Team M4/Emgo Suzuki
AMA Team Graves Motorsports (Factory Yamaha)
AMA SupersportChampion (Factory Kawasaki)
AMA Superstock Champion(Graves Yamaha)
AMA Superstock Champion
AMA Superbike Champion(Factory Honda/Nikki Hayden)
AMA Formula Extreme Champion Attack Suzuki
Factory Honda (CBR1000RR, RC-51, F4i, CBR600RR)
Erion Racing (CBR1000RR, CBR954, F4i, CBR600RR)
Attack Suzuki (02-03 Formula Extreme Champion)
Valvoline/Emgo Suzuki (GSX-R 600/750/1000)
Graves Yamaha (R6 / R1 )

Dallara asserts that Dynojet Research Labs is less qualified than Yamaha Inc in tuning engines. That assertion may well be true. I for one, am not qualified to make or judge that assertion. However, what Dallara ignores is the productions costs and limitations that the world-wide market impose on Yamaha, which are not present with Dynojet. He also ignores the pressures Yamaha faces in trying to bring a product to market that face multiple layers of government regulations. They do the best they can with those forces at work. Thus, in steps the aftermarket community.

(For the record, I am a big Yamaha fan and think the S10 is truly remarkable machine.)

And, to answer Dallara's questioning, even though it was done to attack my character. I brought my bike to my buddy because he has tools I do not. I had a vacuum balancer somewhere around 30 years ago, but it's long gone. My friend has one that he lets me use for free, and if I'm lucky and he's not busy, he'll do it for me for FREE. I like free.

 

[tc9988]

You might want to make note... I never questioned your decision not to use the air screw adjustment, etc. If it didn't work for you, fine, no problem.

My reply was strictly to address your claim that folks around suffered from "ignorance". Why is it you can insult members of the forum en masse and then expect everyone just to bow down to that crap. Seems like you're the one who started out with the negativity and outright hostility...

Nobody said that you ever stated that an ECU re-flash was "snake oil", either, but your prattling of "please don't try to tell me the gen 2 flash is better than a PC V with auto tune because that's just plain ignorance" is nothing more than inane, inexperienced, and uneducated supposition. You've clearly admitted that you have never had the re-flash in question, and from all evidence you don't have a PCV or AutoTune on your bike, either, so how the hell can you make such a ludicrous claim in the first place? Isn't not having the slightest idea of what you're talking about - in this case FI system modifications on the Yamaha Super Tenere - the true definition - i.e. lacking knowledge or awareness in general; uneducated or unsophisticated according to the dictionary - of blatant "ignorance"?

And no, there are currently *NO* AMA or WSBK machines using a PowerCommander, much less DynoJet's AutoTune. You'd know that if you even had a femto-inkling of the subject being discussed, or of higher level racing in general. And if your local mechanic/race tuner guru actually had much in the way of real race experience he would have told you that, too. Sure, there are some club level racers that use PCV's, and even AutoTune's, just like they sometimes use lots of other stuff that is often easier and simpler to implement than a true core solution, but you will never see a DynoJet PCV or AutoTune on the grid of a WSBK event.

Just because DynoJet is a both an event and series associate sponsor of the AMA/DMG Superbike series does not mean that anybody in the series actually uses them on their team bikes, any more than anyone in the series uses a Scala Rider intercom system, insures their race bikes with GEICO, wear Cortech mesh jackets, has joined the National Guard, tries to qualify a Kymco scooter, etc. (http://www.amaproracing.com/rr/partners/), so yes, Yamadad... You're wrong.

And no, again... Neither the PowerCommander V nor AutoTune for the Yamaha Super Tenere alters ignition timing. Yes, DynoJet makes some PCV's that can alter ignition timing, but they don't sell that kind of PCV for the Super Tenere, and the AutoTune only alters fuel delivery, so yes, Yamadad, you're wrong... Again. Don't believe me, look for yourself...

http://www.powercommander.com/powercommander/powercommanders.aspx?mk=28&mdl=118&yr=2012&pc=22-041&mk-n=Yamaha&mdl-n=XTZ1200&pc-ver=PCV&add-mdlyrid=22-041&add-mdlyrid2=22-041&fullstr=22-041&prod-type=Powercommander%20V

And while we're here, let's not forget that Yamaha's own stock ECU, as well as a re-flashed one, "can alter the mapping and ignition curves for each cylinder in micro seconds on the fly as it reads the exhaust gases" via the stock O2 sensors. While it only does this in the closed-loop section of the ECU mapping, it does it nonetheless, so nothing your hallowed DynoJet products do have anything on even the stock components as far as "microprocessor" capability. Get sucked into the ad hype if you wish, but don't think for a moment that anyone at DynoJet is more savvy about electronic fuel injection than the guys who design the factory OEM units. That's like saying the geeks at Alienware are more processor savvy than the chip designers at Intel or AMD.

And yes, invoking Al Gore and his internet invention faux pas is an old joke... So old and tired that it ceased to be even remotely humorous years and years ago. So much so that when somebody trots it out it only serves to make one laugh at the poster, instead of with him.

But your reference leads me to ask you a question, as I'm curious... If you have "been riding and turning wrenches since before Al Gore invented the Internet", then why on Earth would you need a "pro tuner and mechanic with over 30 years of track and real world experience" to do a simple, easy, elementary, uncomplicated, straightforward, painless throttle body synch or air bleed screw adjustment for you? It's not more difficult than an oil and filter change, and doesn't take much, if any, more time. Why would you need a pro's help if "this ain't my first rodeo either"?

"Ignorance" is a funny thing... You toss it out and think it's neither "negativity" nor demonstrates any "hostility" on your part, yet when it is clearly pointed out that it's only your own "ignorance" and lack of experience with this motorcycle that clouds your statements then somehow it's the rest of the world that's negative or hostile... Interesting.

Dallara



~

sometimes your ad nauseum diatribes actually contain a nugget of good info, but I'll bet I'm not the only one who wonders if you ever actually listen to yourself. Maybe less time in the pulpit and more time in the saddle might be a good idea ;D

 

[tomatocity]

Can we get back to "Airscrew Adjustment to fix off-idle stumble and Throttle Body Sync - w/ pigtails".

Consider taking your personal differences to PM's.

 

[yamadad]

Can we get back to "Airscrew Adjustment to fix off-idle stumble and Throttle Body Sync - w/ pigtails".

I completely agree. ::021::

 

[spacemanspiff]

Thanks for the how-to info! ::008::

I just did this on my S10 with 20k miles on it --AFAIK it hadn't been done before.
Piece of cake using Grok's Harmonizer once i figured out that the two vent tubes from the tank were captured tightly by the clamps and preventing me from raising the tank.
I ended up synching at 1/2 turn out from fully seated (as my RS reference (white-painted) screw was fully seated originally and I couldn't get the LS didn't quite to be in spec when fully seated also).
The bike is a little smoother now and idles more evenly. It didn't have an off-idle stumble problem before the synch.

There some talk earlier in the thread re: Twin-max, but I didn't see anyone mention that to get the best results with that tool, it is best to use a fresh battery in it. FWIW

 

[Stoney]

I just did TBS my bike has about 23k on it. Everything is good but when I take off from a stop I hit a flat spot like there is no fuel. Any ideas???

 

[rotortech71]

I just did TBS my bike has about 23k on it. Everything is good but when I take off from a stop I hit a flat spot like there is no fuel. Any ideas???

I you haven't done it yet, definitely go back in and check to make sure the vacuum line on the left is on all the way, as well as the cap on the right. Other than that, did you make an adjustment, and if so, was it a significant one?