[bmoreraven]

I installed the vance and hines twin slash staggered a few weeks ago. The pipes sound awesome, but i have noticed a engine stutter around 35mph in 2nd gear. I had done the o2 mod and took it out to see if that would correct the problem, which it did not. Any ideas or anyone else have the same problem?

 

[strykertony]

mine does this too, ive just adjusted my shift timing and i dont worry about it anymore. i stressed about it alot after i changed my pipes but as far as i know noone has been able to solve this issue.

 

[bmoreraven]

Thanks tony. I am eventually changing my air intake and getting an autotuner. Im hoping that will fix it. But i am not gonna do that till late fall and was wondering if there was a quick fix until then.

 

[gravitas]

I noticed this before I did any upgrades. I had my exhaust, air, and tuner installed all at once.

I got the Gman Bully and the problem went away, 2nd gear is much more responsive. So you do not need the autotuner.

 

[puma]

I had the stutter when it was all stock. My auto tuner fixed it. I don't know of a quick fix. Good luck.

 

[bmoreraven]

So the problem isn't the clunkiness in low rpms in second gear. It's almost like the bike is misfiring while staying constant on the throttle at around 35-40 in second gear. It also does it in 1st around 20 mph. Havent noticed it in any other gear. It's really annoying especially on on-ramps and off-ramps.

 

[11Stryker]

Yea- the O2 mod will help that till you gat a tuner.

 

[bmoreraven]

Yea- the O2 mod will help that till you gat a tuner.

I had the mod before i put the exhaust on. When i noticed the issue, i took the resistor out and same problem. I see a auto tune in my near future.

 

[DraEagWol]

I have that same problem. first let me state that iv got the V&H twin slash , the Cobra Power Flo intake, and the Cobra PowrPro AutoTuner - and the bike was doing this only in the 2nd gear cruising at 35mph... Well I took off the PowrPro and sent it in to be fixed / reparied.

I ran the bike and it got worse without the tuner - now experiencing it in 1st gear and 2nd gear like you... So, I unplugged the O2 sensor from the bike and while it still stutters / chuggs / surges - it's no where near as bad as when the sensor was plugged in.

So, I'm hoping that when I get my Tuner back - it will solve those little nagging issues, - I'll leave an update when I know more.

 

[11Stryker]

I had the mod before i put the exhaust on. When i noticed the issue, i took the resistor out and same problem. I see a auto tune in my near future.

Yeah that problem never went away completely for me either till I got the Cobra Autotune.

 

[11Stryker]

just a note that 86 or 87 octane runs best in this bike. Not sure what you are running.

 

[bmoreraven]

just a note that 86 or 87 octane runs best in this bike. Not sure what you are running.

I used 93 for the first year i had the bike and have since then ive used 87. Thank you for all the help. I thought i was going crazy.

 

[Blackvapor]

just a note that 86 or 87 octane runs best in this bike. Not sure what you are running.

Really? I've been running 89 since I bought the bike, thinking I was doing it a favor by not running regular.

What do you find the differences in the octane levels make?

 

[11Stryker]

Really? I've been running 89 since I bought the bike, thinking I was doing it a favor by not running regular.

What do you find the differences in the octane levels make?

89 is probably no big deal, but the higher octanes are for high compression engines so that it helps prevent detonation or preignition. Higher octanes have a higher flash point. Yami recommends 86 or 87(89 is fine) for our engines. They have lower flash point and therefore ignite easier providing better power. Race engines need Higher octane because of there high compression Ratio. This has been discussed multiple times on here within different threads.

 

[kakarot]

I do not recall it with my vance and hines... I do have the auto tuner... but now that I switched to the cobra swepts, it happens every now and then.... I even had my first stall last night...

not a big deal, but it is "new"

 

[BDS369]

I know this is an old topic but I was wondering if anything had been figured out. I just got my bike and I have V&H big radius, low & mean performance air intake, and V&H fuel pack. The stutter is driving me mad. It happens in both 2nd and 3rd gear (more so in third) any time I hover around the 40mph mark it acts like it wants to die if you don't give it throttle. If I lay off it for even a second I worry. Surely there has to be a solution!

 

[DraEagWol]

bds369 -

Unfortunately there has not been one solution to fit all cases. It seems that there are just enough variances in our bikes to make them "unique" in terms of figuring out a solution. I'm surprised to hear though that your V&H pipes are not playing well with your V&H tuner.

I hate that stutter as well, drives me crazy ! I have it in every gear ... there is just a certain "cut-off" - in the RPM range for each of the gears that will cause it stutter - & spit. So, I'm replacing my V&H - with some Cobra's tri-pro's.. and see if that helps... and if not then i'm replacing my Cobra PwrPro tuner for an EJK tuner... and if all that doesnt work... then I don't know what I'm going to do other than having to shell out for a power commander and getting it dyno'd and tuned in. *shrugs*

Do, have a question for ya tho, with that V&H fuel pak - can you change the settings on it? (what settings is it at and what have you tried adjusting it to?) or is it a plug n play?

 

[BDS369]

bds369 -

Unfortunately there has not been one solution to fit all cases. It seems that there are just enough variances in our bikes to make them "unique" in terms of figuring out a solution. I'm surprised to hear though that your V&H pipes are not playing well with your V&H tuner.

I hate that stutter as well, drives me crazy ! I have it in every gear ... there is just a certain "cut-off" - in the RPM range for each of the gears that will cause it stutter - & spit. So, I'm replacing my V&H - with some Cobra's tri-pro's.. and see if that helps... and if not then i'm replacing my Cobra PwrPro tuner for an EJK tuner... and if all that doesnt work... then I don't know what I'm going to do other than having to shell out for a power commander and getting it dyno'd and tuned in. *shrugs*

Do, have a question for ya tho, with that V&H fuel pak - can you change the settings on it? (what settings is it at and what have you tried adjusting it to?) or is it a plug n play?

There are quite a few settings in the fuel pack that you can change. (at least 20). Its a small lcd with a few buttons to change the settings. They give you a base map and then you tell them what equipment you have and they give you the recommended map for your bike. I happen to have the dealer put mine in but I know how to change them. I don't have my current settings written down but I'll look at it tonight. I haven't contacted V&H yet on this issue but I suppose I could if I still get nowhere on it. It obviously isn't specific to this hardware, it happens even on a stock bike.

 

[thekevin]

I have a PC5 on mine with Powrflow intake and Twin Slashed exhaust and it runs awesome but has that stutter when you are flat on the throttle in second gear about 30mph. I am about a month away from my dyno tune so we will see what that does for it.

 

[Michael88997]

I have the twins, auto tuner, and powerflow air cleaner and I get the stutter... I have not been able to get rid of it. got use to it but would like to solve the issue... anybody tried the EJK tuner with the pipes and air cleaner?