Jerkiness

[jacko]

You are wasting your time and money , get rid of the bike , my 09 has a smooth throttle , I believe Yamaha fixed it from 08 on .

there is enough posts above saying the G2 and PC3 don't work .

The throttle on my 06 was a real PITA .

 

[Fred W]

You seem to be the only one saying they weren't able to fix their early 2nd Gen, jacko.

And you seem to be saying it over and over again.

 

[Drew]

So I might as well sell my '07 which I got for $7K and buy an '08 for around $10K instead of trying to fix the issue for around $400? Just trying to clarify......

 

[RadioHowie]

You are wasting your time and money , get rid of the bike , my 09 has a smooth throttle , I believe Yamaha fixed it from 08 on .there is enough posts above saying the G2 and PC3 don't work .

Funny...I've read 3. And two were from you!

 

[jacko]

Yeah well if posting 2 times is over and over , I'm guilty

There are other posts there that say didn't cure the problem completely , what they really want to say is not at all .

Screw the idle up some say , stay in a higher gear , that will help 2 , its all wishful thinking

Drew the extra 3K for the 08 would be the best 3 grand you ever spent , go take one for a ride

Simple fact Yamaha stuffed up with the throttle on the 06 , dunno about before 06 have never ridden one , just like they did with their bloody Top Box

My 09 even though it looks the same as my 06 is a different bike

 

[GillaFunk]

OH CHRIST. NOT THIS SHIT AGAIN

 

[Fred W]

"Eight year olds do..." :lol:

 

[EasyE]

You are wasting your time and money , get rid of the bike , my 09 has a smooth throttle , I believe Yamaha fixed it from 08 on .there is enough posts above saying the G2 and PC3 don't work .

The throttle on my 06 was a real PITA .

My 2010 does it too - yamaha still hasn't fixed it.

 

[Tree Doc]

Thought I'd add a comment on the subject...

I don't have one of the evil Gen 2's but my '05 throttle has been pretty twitchy in the <4k range. Most notably after turn entry when you're introducing that little bit of throttle through the apex to stabilize the suspension in the turn. It was rather tough to do that smoothly and consistently as well as throttle control on low speed maneuvers such as in town driving. I installed the PCIII-USB that I received yesterday and downloaded first, "Wally's Smoothness Map" and then tried "Bill's version of the Wally Map" which I stuck with the latter. On my last bike, the PCIII didn't really do a whole lot for me....it was probably fine from the start. This time I experienced a VERY significant and positive change. I'm really pleased with the result as all the twitchy reaction is now gone and throttle input is very even and controlled. The pinging I believe I have been experiencing on this bike at hot idle and on through the 1000-2500rpm range at steady-held throttle seems to have subsided, as well.

I'm diggin' it so far!

 

[Drew]

The pinging I believe I have been experiencing on this bike at hot idle and on through the 1000-2500rpm range at steady-held throttle seems to have subsided, as well.

Pinging? Like a soft knocking, like a lifter tick? I've noticed this as well, mainly after the 4K service I just got done, something that isn't a problem?

 

[bramfrank]

Said it before. I'll say it again:

I have zero issues with the Gen-II cam/mapping on my '06 - and that's the model with supposedly all the problems. Too much tension, too abrupt throttle and so on.

just learn how to handle it.

 

[ionbeam]

You are wasting your time and money , get rid of the bike , my 09 has a smooth throttle , I believe Yamaha fixed it from 08 on .there is enough posts above saying the G2 and PC3 don't work .

Funny...I've read 3. And two were from you!

In statistics, when analyzing and plotting data it is permissible to throw out the 'outliers' -- values and readings that are wildly out of line with the balance of the data. Usually the outliers are as the result of incorrect measurements or erroneous methods, making them unrelated to actual data. I'm declaring an outlier...

 

[Drew]

Yea but what about.......

Pinging? Like a soft knocking, like a lifter tick? I've noticed this as well, mainly after the 4K service I just got done, something that isn't a problem?

 

[Tree Doc]

Yea but what about.......

Pinging? Like a soft knocking, like a lifter tick? I've noticed this as well, mainly after the 4K service I just got done, something that isn't a problem?

I've posed the question before but got nuthin'! I wouldn't equate the noise to a "lifter" type noise...it's not a tick, but more of a clunking, knock sound that's randomly spaced, not rhythmic. You can feel it through the handlebars and the best I can describe the sensation is it sounds/feels similar to if you lugged the shit out of the motor like you're in a turn in 4th and trying to accelerate when you should be in 2nd and you can hear and feel the valvetrain chattering as you lug it. It will sometimes occur if I hold the throttle very steady at a given rpm, like 1500. The motor will hold that rpm and then this random clunk will kick in. It will show a fluctuation on the tach when it does it.

After long runs on real hot days, if I pull up to a signal and forced to idle for a while, it will do it. It will occur from the lower idle rpm through about 2500-3000 rpm if I hold the throttle steady anywhere in that range. When I go above that, then the twitchiness of the throttle would take the rpms up above 3k and even though I'm steady at throttle, rpms would be very hard to hold steady until I get up to and over 4k. It doesn't seem to occur while the motor is under load or at the higher rpm's at cruise...it's pretty smooth there. As told to do here, I've just decided to "ride the shit out of it" so I've done what I can. I just hit 10k on the clock. That's just short of 7k on the bike since the middle of May when I bought it. After a lot of contemplation, I think what I'm experiencing is audible pre-detonation in one or two cylinders. Possibly a lean condition that worsens on a hot engine?

I'll be riding some more today with the PCIII and will pay close attention to the phenomenon and see if it persists. In the shorter distances I have ridden since it's install, it seems as though the problem is gone....we'll see.

 

[RaYzerman19]

A perceived valve train rattle is likely pinging since you're lugging it. That could be partly due to low octane fuel (try mid-grade to see if it goes away) and the lean condition of the OEM FI map. The random 'clunk' at a steady rpm is again the lean condition and a surge. All of this smooths out at higher rpms. IMHO the only thing that fixes it is proper adjustments (TB sync, TPS, idle) and a PCIII or PCV. If you can avoid high ethanol fuels, do so.

 

[Fred W]

You are wasting your time and money , get rid of the bike , my 09 has a smooth throttle , I believe Yamaha fixed it from 08 on .there is enough posts above saying the G2 and PC3 don't work .

Funny...I've read 3. And two were from you!

In statistics, when analyzing and plotting data it is permissible to throw out the 'outliers' -- values and readings that are wildly out of line with the balance of the data. Usually the outliers are as the result of incorrect measurements or erroneous methods making them unrelated to actual data. I'm declaring an outlier...

So you're saying he is not statistically significant?

Oh the shame...

 

[ionbeam]

I didn't claim anyone was insignificant, I try to keep things impersonal if I can. I did point out that there is one data set that has consistently been wildly divergent from the mean (middle ground) and therefore the followers of this thread should consider this in taking away information derived from the presented data :blink:

Earlier in this thread I tried to make the point that there are several possible root causes for the throttle jerkiness but it is difficult to sort them out because they each cause very similar symptoms. I tried to define each root cause and how one can tell the difference between them. Some or all of the root causes may be present so there may need to be more than one solution.

From what I've seen, a Power Commander seems to fix and/or mask most of the root causes. While a big-buck solution it does seem to have the most success in being a one shot fix.

 

[Drew]

I've posed the question before but got nuthin'! I wouldn't equate the noise to a "lifter" type noise...it's not a tick, but more of a clunking, knock sound that's randomly spaced, not rhythmic. You can feel it through the handlebars and the best I can describe the sensation is it sounds/feels similar to if you lugged the shit out of the motor like you're in a turn in 4th and trying to accelerate when you should be in 2nd and you can hear and feel the valvetrain chattering as you lug it. It will sometimes occur if I hold the throttle very steady at a given rpm, like 1500. The motor will hold that rpm and then this random clunk will kick in. It will show a fluctuation on the tach when it does it.

I've got the rhythmic thing and it does seem to disappear around 3000 rpm, nothing I would call a clunking or a knock. It gets harder to hear the warmer the engine gets.

 

[Fred W]

I think what you guys are talking about is the lean stumble that happens at idle and during "cruise".

It also happens (on my 1st gen) right on up to ~4000 rpm when under a light load (steady throttle). It's the symptom that is often referred to as "surging".

That is, until I installed a PCIII. You know, that thing that doesn't do anything...

I added fuel in the left hand columns of cells, which smoothed out the on-off throttle transition (aka Jerkiness. But 1st gens aren't Jerky) and got rid of the surging.

But now ionbeam says I have a smelly exhaust.

 

[wheatonFJR]

I think what you guys are talking about is the lean stumble that happens at idle and during "cruise". It also happens (on my 1st gen) right on up to ~4000 rpm when under a light load (steady throttle). It's the cause what is often referred to as "surging".

That is, until I installed a PCIII. You know, that thing that doesn't do anything...

My second Gen 1 seems be "jerkier" than my first...where I noticed not much at all. I was riding with my son on his XJ600...and that little on/off thing happening under steady throttle is definitely there. I am willing to live with that for economic reasons (gas mpg, cost of commander).

However, yesterday when I went to pass under heavy load (rpm at 5.5k...towards the beginning of the pass), I felt something like an off switch for a millesecond. Not something you want during a pass. This isn't related to the low rpm jerkiness is it? I quickly looked at my voltmeter to make sure THAT wasn't happening again...but all was well and good on the volt thing.

I guess I should sync the throttle bodies and see if that helps...it's been over a year since that was done.

BTW: it's good someone put a subtitle below the title of "Jerkiness"