Arrow headers vs stock de-cat

[lukasteam]

Want to get your opinion guys on the exhaust headers . Are Arrow headers wider than stock ?
I'm a mechanic with some decent fab skills ( or so I think , lol ) I can easily de-cat stock headers saving me a bunch of money comparing to buying Arrow headers . I know Arrows are stainless steel and look better than stock , but performance vise would de-cated stock would be the same as Arrows ? Only thing that I can think is if they are made from wider tubing .
Can guys that have Arrows pitch in on this one ...

 

[Clawdog60]

IMPO install a high quality muffler; leave the rest alone. Not enough gain for the pain.

 

[lukasteam]

IMPO install a high quality muffler; leave the rest alone. Not enough gain for the pain.

I'm trying to figure this out , because there's a lot threads that say the opposite , stating that cat really chokes the gas flow ...

 

[fac191]

I'm trying to figure this out , because there's a lot threads that say the opposite , stating that cat really chokes the gas flow ...

https://www.rideapart.com/articles/247143/adding-power-to-our-2014-yamaha-super-tenere-project/

 

[Jlq1969]

https://www.rideapart.com/articles/247143/adding-power-to-our-2014-yamaha-super-tenere-project/

I suppose that the 18hp that They win in the rear wheel, also win in the crank, then 112 + 18 = 130hp .... They are geniuses !!!! .... it is the restyling of the S10 that we were waiting for all

 

[Flat lander]

Thought about the header thing. Then decided to just add a yoshi can. Got it at a good price from a fellow member. In the seat of the pants it did help the horse power and torque curve. Still thinking about a reflash. Just keep reading to many good things about it

 

[Paul466]

Thought about the header thing. Then decided to just add a yoshi can. Got it at a good price from a fellow member. In the seat of the pants it did help the horse power and torque curve. Still thinking about a reflash. Just keep reading to many good things about it

Did the same thing, Yosh silencer/stock headers. Got Anthony to do the flash, AWESOME results, the only thing i was disappointed with was I haven’t got the flash earlier.

 

[fac191]

Did the same thing, Yosh silencer/stock headers. Got Anthony to do the flash, AWESOME results, the only thing i was disappointed with was I haven’t got the flash earlier.

An end can and flash is all you really need to do. I know someone who had the Arrow headers and he said it was much louder. Which wouldn't appeal to me. Mine goes well enough with end can and flash i can ride it in touring mode most of the time. Once your in 4th gear it really gets goung.

 

[Paul466]

An end can and flash is all you really need to do. I know someone who had the Arrow headers and he said it was much louder. Which wouldn't appeal to me. Mine goes well enough with end can and flash i can ride it in touring mode most of the time. Once your in 4th gear it really gets goung.

. With the flash you get to pick a “menu” of different levels of power delivery also engine braking.

 

[thughes317]

Related to this topic: Can anybody with Arrow headers and ACD skid plate comment on fitment? I've seen examples where the header contacts the skid plate and there had to be some modification made to the plate. Any input/pics appreciated.

 

[lukasteam]

I have Anthonys flash and I guess I'm the only one thats not happy with it . Maybe I expected too much from it . I thought it will give me perfect fueling and will wake up the bike in first 3 gears . Nope .Flat spots in second and third gear . First 3 gears the bike still has no pull and fueling in S-mode is so bad . In 4 gear the bike wakes up and it's nice from there on .Throttle is so snatchy on the roll on's and roll-off's in S-mode . When you change gears and close the throttle it sends you over the tank , throttle roll on's are so sensitive it's like Rossis track bike . I want to be "sloppy" with my throttle and the ride to be smooth . IN T-mode roll on's and off's are very nice and smooth , but T-mode doesnt have the full muscle of S-mode . Also when you cancel cruise control it sends you over the tank just like closing the throttle . I think it still has 25% too much engine braking after the flash . I understand this is not a custom map , people say oh calibrate your wrist ... f that I dont have to calibrate my foot when I switch my cars and I dont have to keep my foot on the gas to change gears on the car , so it doesn't feel like I threw the anchor out .
It's an adventure bike , not a track bike , I think fuelling should be soooo much smoother for easy relaxed riding on and off road . I don't know like I said maybe I was just expecting too much from this flash . In other words I like T-mode , but would like the muscle of S-mode in it and at least 25% less engine braking - that would be perfect for me .
So can anybody tell me if diameter of arrow headers is wider than stock ???

 

[Clawdog60]

$330 for a cat delete pipe? OUCH!
I would have to see flow bench numbers on cat vs pipe to justify that expense.

 

[treybrad]

I have Anthonys flash and I guess I'm the only one thats not happy with it . Maybe I expected too much from it . I thought it will give me perfect fueling and will wake up the bike in first 3 gears . Nope .Flat spots in second and third gear . First 3 gears the bike still has no pull and fueling in S-mode is so bad . In 4 gear the bike wakes up and it's nice from there on .Throttle is so snatchy on the roll on's and roll-off's in S-mode . When you change gears and close the throttle it sends you over the tank , throttle roll on's are so sensitive it's like Rossis track bike . I want to be "sloppy" with my throttle and the ride to be smooth . IN T-mode roll on's and off's are very nice and smooth , but T-mode doesnt have the full muscle of S-mode . Also when you cancel cruise control it sends you over the tank just like closing the throttle . I think it still has 25% too much engine braking after the flash . I understand this is not a custom map , people say oh calibrate your wrist ... f that I dont have to calibrate my foot when I switch my cars and I dont have to keep my foot on the gas to change gears on the car , so it doesn't feel like I threw the anchor out .
It's an adventure bike , not a track bike , I think fuelling should be soooo much smoother for easy relaxed riding on and off road . I don't know like I said maybe I was just expecting too much from this flash . In other words I like T-mode , but would like the muscle of S-mode in it and at least 25% less engine braking - that would be perfect for me .
So can anybody tell me if diameter of arrow headers is wider than stock ???

1st gen or 2nd gen bike? How many miles? Have you sync'd your throttle bodies?

With the flash, the bike rips pretty good in the low gears in S mode, for what it is. Plenty to loft the front wheel in 1st gear w/o the clutch. You're saying you have flat spots in 2nd and 3rd. If you whack open the throttle at 3k RPM in those gears, you can feel the power surge and fall off at various points in the rev range? That's not normal, I wonder if you have something else going on.

I've found that smooth on/off throttle at low speeds is very dependent on the TB being sync'd up, and it's still never going to be as smooth as a carbed bike -- luckily there's a clutch lever. Even with the flash, 1st gear does still take me being particularly careful getting back on the throttle to be really smooth, but no worse than any other FI bike I've owned. I think the little bit of driveline slop exacerbates the issue.

Engine braking... I'm not even going to comment. Everyone seems to have a different idea of what's 'normal' or what they prefer.

trey

 

[scott123007]

I have Anthonys flash and I guess I'm the only one thats not happy with it . Maybe I expected too much from it . I thought it will give me perfect fueling and will wake up the bike in first 3 gears . Nope .Flat spots in second and third gear . First 3 gears the bike still has no pull and fueling in S-mode is so bad . In 4 gear the bike wakes up and it's nice from there on .Throttle is so snatchy on the roll on's and roll-off's in S-mode . When you change gears and close the throttle it sends you over the tank , throttle roll on's are so sensitive it's like Rossis track bike . I want to be "sloppy" with my throttle and the ride to be smooth . IN T-mode roll on's and off's are very nice and smooth , but T-mode doesnt have the full muscle of S-mode . Also when you cancel cruise control it sends you over the tank just like closing the throttle . I think it still has 25% too much engine braking after the flash . I understand this is not a custom map , people say oh calibrate your wrist ... f that I dont have to calibrate my foot when I switch my cars and I dont have to keep my foot on the gas to change gears on the car , so it doesn't feel like I threw the anchor out .
It's an adventure bike , not a track bike , I think fuelling should be soooo much smoother for easy relaxed riding on and off road . I don't know like I said maybe I was just expecting too much from this flash . In other words I like T-mode , but would like the muscle of S-mode in it and at least 25% less engine braking - that would be perfect for me .
So can anybody tell me if diameter of arrow headers is wider than stock ???

The OD of the Arrow headers is identical to the OEM. What I don't know is if the OEM are double wall or not. The Arrow's are not. I LOVE my Arrow headers. They save a little weight and give more ground clearance. (At least on the Gen 2) Definite bump in performance too.

 

[scott123007]

Related to this topic: Can anybody with Arrow headers and ACD skid plate comment on fitment? I've seen examples where the header contacts the skid plate and there had to be some modification made to the plate. Any input/pics appreciated.

You have to modify the ACD plate (cut out a piece so one of the two pipes can clear) because the bend on an Arrow header is a little different than stock. I'm not sure if ACD has made any changes to their current plates, but that used to be the case.

 

[thughes317]

You have to modify the ACD plate (cut out a piece so one of the two pipes can clear) because the bend on an Arrow header is a little different than stock. I'm not sure if ACD has made any changes to their current plates, but that used to be the case.

Thanks. I've seen that mod on the internet and wasn't sure if it applied in all situations. Reckon I'll hold off on the Arrows for now, seems kind of silly to be cutting a hole in my skid plate exposing the very exhaust system parts that I installed the plate to protect in the first place.

 

[fac191]

$330 for a cat delete pipe? OUCH!
I would have to see flow bench numbers on cat vs pipe to justify that expense.

Mine is the same in the first 3 gears. I do think its to make the bike more manageable when off road or poor terrain. I think its a good idea as you get the best of both worlds in 4th and 5th gear and 6th is a nice overdrive gear for motorways and the like. Mine fuels perfectly in both modes. But its very relaxing to ride in touring mode over rough terrain as it wont jump around on the throttle. I had the engine braking lowered aswell but its still more than enough to be usefull. Its nice coming of the cruise control too as before it was awfull. I dont have great hands as i have problems with them so learning to control the throttle is no good

 

[lukasteam]

Thank you guys for info . I guess I will roll up my sleeves and de-cat the stock exhaust , beats paying $300 for Arrow and cutting ACD skid .
By the way my ST is 2nd gen. 2017 , Anthony flashed it at 3K miles now I have 5K on it , so I had plenty of time to play with it . Removed the slack from throttle cables , I did throttle body sync with my harmonizer , as I remember left screw is about 1/2 turn out . Did plenty of city and country riding . Trust me guy's this is not my first FI bike and I don't expect the fueling to be like a carbed bike . Trying to shift the gears you should be able to close the throttle and the bike shoudn't act like you just tapped the front brake . Now I have to leave the throttle slightly open so it doesn't send me in to the tank . How do you ride with this off road when you going over the rough terrain and every bump followed by the slight wrist movement makes the bike so twitchy . Like I said in previous post , this throttle sensitivity would be great on a track bike , but not on adventure bike . Disengaging cruise control again feels like I just tapped the front brake going 70 miles and hour - thats crazy !!! I have to accelerate and while doing to disengage the cruise control , otherwise me and passenger get slammed on to the tank its scary . Who's going to tell me this is normal and I should just calibrate my wrist ???
Fac191 who did your flash ?

 

[Xclimation]

I decatted my stock exhaust and am glad I did it. Stainless steel just like the Arrow. Weighs the same as the Arrow when decatted. When you cut it open and see how restrictive the cat material is....you'll see what I mean.

 

[Tenman]

I decatted my stock exhaust and am glad I did it. Stainless steel just like the Arrow. Weighs the same as the Arrow when decatted. When you cut it open and see how restrictive the cat material is....you'll see what I mean.

Wish I woulda went that route