[Michael88997]

Ok so I wanted to bring all this info to one thread so hopefully it can help me and others out. anybody that has the twins if you can list if you have chugging or not and the setup you use to get all the info together.


I have the autotune and tried to adjust the pot inside and it helped, I am going to adjust a little more today but I am worried about mpg dropping, I tried o2 unplug and it worked for a week then started getting too rich at idle and dieing.

I may also try to unplug my o2 and lean the tuner out a bit..

anybody else what tuner do you have and do you get the chugging or not?

 

[nogard]

I have the VnH twin staggered, air intake, and auto tuner. I had the chugging from just the pipes installed, and nothing else.

It only happens to me in second gear, and only if i go very slow out of 1st, and cruise at a steady speed in 2nd. It almost never happens now, as i'm used to it and know when to shift from the experience of it happening all the time.

 

[klarowe]

What do you mean by chugging to make sure everyone is on the same page. Do you mean a 'loss' of power (sluggish) or a complete hiccup that causes the bike to 'buck' slightly at low rpm / throttle?

 

[Michael88997]

in second gear when your slow on the throttle or just staying same speed around 30-35mph it starts to act like it doesn't get any fuel and bucks.. mainly happens in slow moving traffic..

 

[nogard]

It's like you have a complete loss of power for around .5 seconds. The bike lunges forward, and all exhaust stops sounded for the .5 seconds.

 

[DraEagWol]

I have the V&H twin slash with the cobra power flo air intake & the cobra power pro CVT - auto tuner.

for me it happens in every gear ... if i hold the throttle steady cruising... it has "dead spots" litterally you can hear the bike gasp - a dead spot is the only way i can describe it. when we were at the MV rally - Nogard can witness how bad my bike was, and Saclean even road it.. It's like it can't decide at each spot (rpm range in each gear) what it wants to do .. richen? lean? hiccups / just flat deads out.

if you get on it.. or shift out of it... its fine... its just a royal pain & an embaresement

 

[nogard]

I have the V&H twin slash with the cobra power flo air intake & the cobra power pro CVT - auto tuner.

for me it happens in every gear ... if i hold the throttle steady cruising... it has "dead spots" litterally you can hear the bike gasp - a dead spot is the only way i can describe it. when we were at the MV rally - Nogard can witness how bad my bike was, and Saclean even road it.. It's like it can't decide at each spot (rpm range in each gear) what it wants to do .. richen? lean? hiccups / just flat deads out.

if you get on it.. or shift out of it... its fine... its just a royal pain & an embaresement

Not to mention dangerous on twisties or the long curves on the skyway...

 

[Michael88997]

hmm. maybe you should try and turn the dial inside the unit to see what happens. sounds way worse than most have it

 

[fridgepig]

Mine does the exact same thing, it is like a dead spot in 2nd when you hold the throttle steady at 30 mph.

 

[klarowe]

Same 2nd gear dead spot here...
2012 Stryker
V&H Twin Slashed
Cobra PowerFlow intake
Cobra PowerPro auto-tuner

I am going to try changing the dial and see what happens.

 

[Michael88997]

yeah mine seems to be working with the dial.. wanted to see if anybody had good success with getting it almost gone. have to get a little more riding on mine first.

just to let anyone know, it doesn't take any tools. just squeeze the sides and the hooks will come off, and need something to turn the dial. I was at the lake so I used my credit card

 

[DraEagWol]

ahh h.ell please... you think I haven't already done everything possible to do .... been there... done that... O2 sensor plugged... unplugged... modded....brand new tuner even... replaced exhaust gaskets... set the tuner at every position on the dial... for my bike.. and it's particular build tolerances.. it just flat out does not like the pairing of that tuner with those pipes... end of story..

new story... getting new pipes shortly... will follow up with results...

 

[bozzly]

ahh h.ell please... you think I haven't already done everything possible to do .... been there... done that... O2 sensor plugged... unplugged... modded....brand new tuner even... replaced exhaust gaskets... set the tuner at every position on the dial... for my bike.. and it's particular build tolerances.. it just flat out does not like the pairing of that tuner with those pipes... end of story..

new story... getting new pipes shortly... will follow up with results...

Seems odd that you spend upwards of 500 dollars for an autotune product that you have to tune. Kinda glad i got rid of mine. What garbage. I don't care what anyone says. It is suppose to autotune but it doesn't with these V&H Pipes and after all this time what has Cobra done? Nada.... Junk.

 

[Michael88997]

yeah I was disappointed it doesn't work with the V&H pipes. they are blamming it on the bike which the 30t seems to work for some not for others.. guess this bike just isn't happy in traffic and wants to go all the time

 

[JesterAZ]

Running twin staggered, powerflo, EJK tuner and 30t pulley with no issues.

 

[razz]

Running twin staggered, powerflo, EJK tuner and 30t pulley with no issues.

Hey bud, I have the same setup but I get popping when i ride her hard but no chugging or hesitation. What's your EJK settings ? Do you get popping? Cuzz I haven't figured out the best setting:banghead:

 

[JesterAZ]

Hey bud, I have the same setup but I get popping when i ride her hard but no chugging or hesitation. What's your EJK settings ? Do you get popping? Cuzz I haven't figured out the best setting:banghead:

The original settings were way to lean for me, it was popping everywhere. Think I'm now running 3.5 grn, 5 yel, 3 red. Only get a pop on hard decel at higher speeds (like an off ramp situation). I guess I could get it to happen at slower speeds but I normally dont gun the bike around town. The bike would pop stock too, just really muffled. Its predictable, I can avoid it by easing off the throttle slower.

 

[Mentat Ix]

I have the V&H twin slash with the cobra power flo air intake & the cobra power pro CVT - auto tuner.

for me it happens in every gear ... if i hold the throttle steady cruising... it has "dead spots" litterally you can hear the bike gasp - a dead spot is the only way i can describe it. when we were at the MV rally - Nogard can witness how bad my bike was, and Saclean even road it.. It's like it can't decide at each spot (rpm range in each gear) what it wants to do .. richen? lean? hiccups / just flat deads out.

if you get on it.. or shift out of it... its fine... its just a royal pain & an embaresement

I had the same symptoms exactly for a long time, with the same setup except I have a baron's big air kit. A year and a half ago, I went to the Cobra shop where they make these things and we were able to recreate the symptoms on a dyno. We found out that at certain RPMs, the ECU on the bike overrides the o2 sensor, faking a rich signal, and it leans out way too much. To the point that it hardly has enough fuel to run. Thats when they started releasing them with the pot on the board for end user adjustment, to try to compensate for that. They couldn't say why Yamaha decide to do that, but they were trying to work around it. On mine, they ended up unpluggin the o2 sensor and changing the program so it worked.

Earlier this year, my CVT crapped out and they replaced it for me - I installed it with the o2 sensor plugged in just to see whats up, and I was back to the same issues. But I did have success by unplugging the o2 sensor again and tuning it with the pot on the board. As far as I know, this is because with the o2 sensor unplugged, in doesn't see the fake rich signal, and so it doesn't overcompensate so its so lean.

I also learned something critical, that everyone should be very aware of when they buy the CVT. This thing only "auto-tunes" when you're actually accelerating. Besides that, all its doing is piggy backing the ECU and adding a hair more fuel than stock. At idle, at cruising speeds, decel, everything. Just like any other tuner ever. And with such a narrow band o2 sensor, it has to let it lean out quite a bit a couple times a second just so it still has a reference. In theory, that works fine for most bikes. On ours, not so much.

 

[Michael88997]

I had the same symptoms exactly for a long time, with the same setup except I have a baron's big air kit. A year and a half ago, I went to the Cobra shop where they make these things and we were able to recreate the symptoms on a dyno. We found out that at certain RPMs, the ECU on the bike overrides the o2 sensor, faking a rich signal, and it leans out way too much. To the point that it hardly has enough fuel to run. Thats when they started releasing them with the pot on the board for end user adjustment, to try to compensate for that. They couldn't say why Yamaha decide to do that, but they were trying to work around it. On mine, they ended up unpluggin the o2 sensor and changing the program so it worked.

Earlier this year, my CVT crapped out and they replaced it for me - I installed it with the o2 sensor plugged in just to see whats up, and I was back to the same issues. But I did have success by unplugging the o2 sensor again and tuning it with the pot on the board. As far as I know, this is because with the o2 sensor unplugged, in doesn't see the fake rich signal, and so it doesn't overcompensate so its so lean.

I also learned something critical, that everyone should be very aware of when they buy the CVT. This thing only "auto-tunes" when you're actually accelerating. Besides that, all its doing is piggy backing the ECU and adding a hair more fuel than stock. At idle, at cruising speeds, decel, everything. Just like any other tuner ever. And with such a narrow band o2 sensor, it has to let it lean out quite a bit a couple times a second just so it still has a reference. In theory, that works fine for most bikes. On ours, not so much.

so when you unplug the o2 sensor did you lean or rich out the pot on the tuner? also what sort of MPG do you get with it like that? I have my o2 plugged in and adjusted mine to a little more rich, the chugging is almost all gone, but I just did it tuesday so don't know my mpg just yet. I was thinking of trying it that way next

 

[klarowe]

I turned up the dial on my PowerPro roughly a 45* turn and the chugging appears to be completely gone... not sure if I went too far though. I'll have to see what my mileage is at my next fill up.