Throttle body sync - How often ?

[groundhog]

Before anyone asks - Yes I have done a search ! I found a post from RCinNY who had exactly my problem and have asked him how his sync has lasted.

I had a TBS on my last service 4,000 miles ago. It cured the vibration I had, along with improved fuel consumption (about 20 miles per tank full) and it also got rid of a surge in revs I was experiencing on acceleration. On my last two rides all those symptoms seem to have returned. I will add that I have had a Yoshimura RS4 on the bike for the last 1000 miles.

Would the Yoshi effect things ? although the problems have only appeared in the couple of hundred miles. How often should a TBS last ? I assumed things would stay in sync for more than 4,000 miles ?

Any help would be appreciated

 

[Brick]

IMHO... You should have the throttle bodies synchronized again if you ever feel the vibration again. It's not a typical periodic maintenance function.
In the old days... when everything was carbureted the bikes with multi carbs needed periodic synchronization. But again it was only performed when needed.

 

[Rasher]

I am going with when the valves are done - which is about the only time it hits the dealer. The main Yamaha dealer said they did them on the 12k service.

 

[Gigitt]

I do Throttle Body Sync whenever I'm under the tank on my 2 bikes. Normally when I do any electrical work running cables, or air dusting under there.
Also during any maintenance like airfilter or spark plugs etc and of course after a valve clearance check/adjust.

It's not always evident when there is a TB sync problem, it can happen gradually an go unnoticed. It is not night and day they are changing.

If you have got the gear to do it (I got a harmonizer) it takes 5 minutes to check and adjust.

TB Sync is not hurting any part of the bike say like puling plugs all the time or checking valve clearances - where you can be unsealing gaskets and crush washers.

 

[AVGeek]

By changing the exhaust, you've changed the airflow characteristics of the engine, so I would go ahead and do a TB synch. I'd also consider a ECU flash at this point as well to try to get your fueling to better match your bike, maybe even some dyno time.

 

[Chuck B]

Any change that alters air flow thru the engine can require TB sync. Adding a basic exhaust can isn't going to make that big a difference. Most certainly needs to be done if/when valve shims are changed.

 

[tomatocity]

Recently had the TB's repaired under warranty (8,900 miles). I had asked when to sync the TB's. Since there seems to be nothing in writing they asked Yamaha. Yamaha replied with every 4,000 miles. I think (thought) this is excessive. I currently 9,800 miles and experiencing surging on a cold start and at low RPMs when it is warm. Also started experiencing Throttle Snatch again which makes riding tight twisty's challenging. Need to talk to the Service Manager. Tuesday I am headed to some tight twisty riding.

I do have a Harmonizer and need to do my own sync and check for vacuum cap leaks.

 

[Bryce]

I've been doing mine every 4000miles (per the recommended maintenance schedule). I've only done it 2 times now but it's been slightly off each time (according to my Carbmate sync tool). The hardest part is lifting the tank.

 

[groundhog]

Thanks for the replies everyone ::008::

My bike is due it's next service fairly soon so I will wait and have it done then. I think I may also get the gear to do it myself in the future

 

[fredz43]

In the owners manual periodic maintenance schedule page 7-3 in my 2014 manual under fuel injection it says "check syncronization" every 4,000 miles.

 

[Defekticon]

I live in a geographic region with four seasons, I've discovered (by accident) that performing the TB sync on the first drastic temp swing day tends to help for the rest of the season, so first cold snap of winter, and first hot day of spring which works out to twice a year (in mid-atlantic US), or the second oil change, whichever comes first.

 

[Brick]

I live in a geographic region with four seasons, I've discovered (by accident) that performing the TB sync on the first drastic temp swing day tends to help for the rest of the season, so first cold snap of winter, and first hot day of spring which works out to twice a year (in mid-atlantic US), or the second oil change, whichever comes first.

Damn Defekticon I my have to throw the BS flag on this. I can't see any reason why this COULD be true! I have over 115,000 miles on Tenere' and have only had this done once.
YMMV!
I agree it needs to be done some... When needed!

 

[Defekticon]

Damn Defekticon I my have to throw the BS flag on this. I can't see any reason why this COULD be true! I have over 115,000 miles on Tenere' and have only had this done once.
YMMV!
I agree it needs to be done some... When needed!

I did my initial sync late last summer Sept maybe?, then checked it again two oil changes later in March and the balance was off again, total mileage between checks was maybe 4000 miles. Not because the bike was running roughly again, but was just curious while doing other maintenance getting ready for a long trip (2800 miles). It wasn't horribly out of sync. The harmonizer was at ~ +8 where it was zero'd before, and it didn't need adjustment to make it smoother. Why was it off? My best SWAG is air temp or barometric pressure. The harmonizer re-calibrates, but I'm assuming it could still be off if the ambient temps/pressure are at the extreme opposite of the previous environment. We had a very very mild fall and winter, then a very cold spring in the mid-Atlantic. I was riding on Xmas eve in 75-80 degree weather picking up gifts for the kids, then had a 4 foot deep blizzard 30 days later. I also think most of the vibration goes away by resetting the idle air screw on the right TB, which is not done as a part of the process in the factory shop manual.

Maybe it only needs to be done when your butt tells you it's moving too much? ::025::

 

[groundhog]

All I know is that after I had the TBS done 4000 miles ago the bike ran better and smoother and the fuel consumption improved. Now it's back feeling like it did pre the TBS so I can only assume it needs doing again. Thanks for all the replies ::008::

 

[whisperquiet]

I check the sync on my bike when the tank is up >>>>>> not very often! It was spot on when checked at 1985 miles (on my third S10..a leftover new 2013). All three of my S10s have been slightly different and my current 2013 is the smoothest by far. I will probably check it again around 10,000 miles.

Here is another thread reference cycling the TPS when the tank is up.....it made a huge difference on my two previous S10s when the throttle response became snatchy/jerky..even though the TBs had been synced.


http://www.yamahasupertenere.com/index.php?topic=12376.msg217151#msg217151

 

[Jazzer]

Hi All,

My bike has about 8k on it and I haven't synced the TBs yet. Reading this thread is making me think I should check them. I have a manometer that I used to use on a v-strom. Can I used that on the Tenere?

Thanks

Ken

 

[Dogdaze]

::004:: This may clear everything up....

https://www.youtube.com/watch?v=VgcnOD7K_9k

 

[Checkswrecks]

Hi All,

My bike has about 8k on it and I haven't synced the TBs yet. Reading this thread is making me think I should check them. I have a manometer that I used to use on a v-strom. Can I used that on the Tenere?

Thanks

Ken

Very easily.


And like Whisperquiet, I do a TBS when he tank is up just because it is so quick and easy. Just did the first on the 2014 at 11,000 miles and it needed very little adjustment. I did CCW the painted reference screw about 3/8 turn and re-adjusted the other throttle to match which made idle a touch smoother.

 

[Jazzer]

::004:: This may clear everything up....

https://www.youtube.com/watch?v=VgcnOD7K_9k

Thanks!

 

[tomatocity]

Very easily.


And like Whisperquiet, I do a TBS when he tank is up just because it is so quick and easy. Just did the first on the 2014 at 11,000 miles and it needed very little adjustment. I did CCW the painted reference screw about 3/8 turn and re-adjusted the other throttle to match which made idle a touch smoother.

Why 3/8 CCW turn and not 3/4 CCW turn?