Taming the beast

Yamaha FJR Motorcycle Forum

Help Support Yamaha FJR Motorcycle Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Is there a Yamaha technician out there that can uncover these changes and alert the dealers of the fix? Am I asking for too much? There must be a Yamaha service center that knows these bikes backward and forward and can get to the bottom of this and back it through Yamaha! Anyone? What about that Tony O?

 
Is there a Yamaha technician out there that can uncover these changes and alert the dealers of the fix?
Your kidding, right?
Most know very little about our bikes, that is why we are on this forum posting the mods and fixes!

:rolleyes:

Wow... this post is my 100th post!

:yahoo:

I'm so excited!

Wasn't that a Pointer Sisters song?

 
Last edited by a moderator:
The power point presentation refers to a "Counter-Progressive Throttle Pulley".

It would be interesting to see if changing this back to like it was on the 05 would get rid of some of the herky-jerky low rpm behavior.

I may have to tear into mine and go take a look at that pulley they are talking about and see just exactly what they have done.

 
I'm in the midst of running down this herky-jerky slow speed operation, myself. One mod that I have had success with is (don't laugh) larger grips! I put on the "American Touring" grips, which are considerably larger than the puny stock grips the bike came with- and it has made it far easier to modulate the throttle. Think about it- you're pulling on a larger diameter so the same effort leads to less throttle movement. Just thought I'd ad to the discussion- these grips are pretty darned big...certainly the largest I've ever used... but they are comfortable, eliminate most of the hand numbness that I was experienceing, and have mitigated some of the drive line jerkiness that has plagued the '06. Try 'em out.

 
Jabba,

A good many of us are using grip puppies which increases the diameter of the grip quite a lot. It certainly is a move in a positive direction, but by no means set things right with the throttle action.

GreyGoose

 
Ok,, I know that this is Fred's thread, but anything that smooths out the throttle response is on topic. Earlier I reported my installation of a Revtech DFO aka: Techlusion TFI. About an hour to install. I have no idea how peak horsepower has been affected, if at all, but driveability is so much better. I said I would report on my weekend trip. 1000 miles down, it ran perfect. I don't think gas mileage was affected. I still netted 43 to 45 mpg at 70+ mph. Before I had the "herky jerky" surging and abrupt throttle response. It made the bike tough to ride in traffic situations, certainly not unrideable by any means,, but just enough to be a constant nag. No computer necessary, or dyno time for this one, it could not be simpler.

:yahoo:

 
I dont know what either of these are: (Revtech DFO aka: Techlusion TFI). Can you explain?
GreyGoose
I guess the short quick description is an "electronic jet kit." It modifies the fuel injector trigger command from the ECU to add fuel in specific ranges. These are popular among the HD V-rod guys. I had no idea how if would perform with the O2 sensor connected,, but I am very happy with the performance.

Chip

 
I dont know what either of these are: (Revtech DFO aka: Techlusion TFI). Can you explain?
GreyGoose
A device which modifies the fuel injection. Generally adding more gas than stock. Along the same lines as a PCIII, but it does not have near the capability of the PCIII, nor does it cost as much as the PCIII.

 
Besides the barbarian jumper mod and CO settings at +7 that I did last week, I did more mods today.

I already have grip puppies and then today I synched the throttle bodies, loosened the middle spring and took out the slack from the throttle cable. Then I took a ride.....WOW!!!! Now it is REALLY SMOOTH. :yahoo: I like it ALOT!!!

Thanks to all of you on this forum my bike runs GREAT!!!!

 
Besides the barbarian jumper mod and CO settings at +7 that I did last week, I did more mods today.
I already have grip puppies and then today I synched the throttle bodies, loosened the middle spring and took out the slack from the throttle cable. Then I took a ride.....WOW!!!! Now it is REALLY SMOOTH. :yahoo: I like it ALOT!!!

Thanks to all of you on this forum my bike runs GREAT!!!!
Guy's I just had to send a message to all you guy's and girl's if I did not read your posts about the barbarian mod and do it last night I was going to trade this bike in today with 1.500 miles on it I didn't like it THAT much. If anyone out there with the Herky-Jerky's at low speed and hasn't done this mod I would suggest this mod. At this point it feels so much better I will keep it.

 
Besides the barbarian jumper mod and CO settings at +7 that I did last week, I did more mods today.

I already have grip puppies and then today I synched the throttle bodies, loosened the middle spring and took out the slack from the throttle cable. Then I took a ride.....WOW!!!! Now it is REALLY SMOOTH. :yahoo: I like it ALOT!!!

Thanks to all of you on this forum my bike runs GREAT!!!!
Guy's I just had to send a message to all you guy's and girl's if I did not read your posts about the barbarian mod and do it last night I was going to trade this bike in today with 1.500 miles on it I didn't like it THAT much. If anyone out there with the Herky-Jerky's at low speed and hasn't done this mod I would suggest this mod. At this point it feels so much better I will keep it.
cartfj40, one item I've found to do that has helped the herky-jerky is when shifting don't take your time to do the shift. Not to speed shift but cut any hesitation between shifts. And also with some of the mods mentioned to help solve this problem make sure your idle is set right and maybe even a little up. Hope this helped, PM. <>< :D

 
If you really want to solve this problem completly, go look at the thread on what I did to my throttle pulley.

The Barbarian mod helped, but the throttle pulley mod made a night and day (HUGE) difference. I can now actually putt around at parking lot speed without any jerkiness whatsoever. The power comes on in a much more linear fashion and it makes the bike easier to ride in a relaxed manner. It is much more deliberate and controllable and the modification didn't take long to do.

https://www.pbase.com/fredharmon/thottlepulley

 
Last edited by a moderator:
If you really want to solve this problem completly, go look at the thread on what I did to my throttle pulley.
The Barbarian mod helped, but the throttle pulley mod made a night and day (HUGE) difference. I can now actually putt around at parking lot speed without any jerkiness whatsoever. The power comes on in a much more linear fashion and it makes the bike easier to ride in a relaxed manner. It is much more deliberate and controllable and the modification didn't take long to do.

https://www.pbase.com/fredharmon/thottlepulley
Sorry bout that Fred. I thought the jerkiness you spoke of was when between shifts especially 1st and 2nd. I've never experienced the problem you are talking about. Have been able to ride around with no problems what so ever at low speed. Even before I did the center spring mod. PM. <>< :)

 
I've never experienced the problem you are talking about. Have been able to ride around with no problems what so ever at low speed. Even before I did the center spring mod. PM. <>< :)
Well, yes you can do it, but it takes an extreme amount of throttle control, and very little throttle movement on the 06 translates to a huge amount of RPM change due to the progressive pulley at the lower end.

Many riders adjust to it, and you may not notice it after a while, but you really don't have good (precise) control of the engine RPM in the first 1/4 or 1/3 of throttle movement. A movement as little as 1mm can vary the engine RPM by as much as 4K rpm in the lower ranges. A good rider can adjust to it over time, but that doesn't make it right.

 
I've never experienced the problem you are talking about. Have been able to ride around with no problems what so ever at low speed. Even before I did the center spring mod. PM. <>< :)
Well, yes you can do it, but it takes an extreme amount of throttle control, and very little throttle movement on the 06 translates to a huge amount of RPM change due to the progressive pulley at the lower end.

Many riders adjust to it, and you may not notice it after a while, but you really don't have good (precise) control of the engine RPM in the first 1/4 or 1/3 of throttle movement. A movement as little as 1mm can vary the engine RPM by as much as 4K rpm in the lower ranges. A good rider can adjust to it over time, but that doesn't make it right.

Fred, you seem to be on a crusade with this issue. Have you ever considered that it is a non-issue for many 06 owners? Perhaps there are other conditions leading to the symptons besides the pulley, such as a lean fuel injection curve, or even a combination of factors which makes your FJR worse than most. Or, perhaps your are just more sensitive than most. It matters not. I am not knocking your efforts to fix a problem that you, and others perceive. Good on you for coming up with a creative solution to your problem.

But you seem to be hyper-sensitive to the issue and needing to convince others they have a problem when they say they don't. When others claim they don't have an issue, you seem to think they do, but they have just learned to live with it and it's still there and a problem. Who are you to tell them what they are experiencing? Perhaps it doesn't take them "an extreme amount of throttle control" to operate their FJR smoothly. Perhaps they do have "good (precise) throttle control". Perhaps FJRs are different in this respect. Perhaps its all the rider. Most likely a combination of both.

Your an intelligent, and helpful guy who came up with an ingenious fix to a problem you perceived with your FJR. But may I suggest you stop trying to convince everybody the sky is falling? Don't take this issue so personally. Just because some don't agree with you on this issue, does not make their own experience or opinion any less valid or accurate. No doubt your creative fix will help some, maybe even many. But that doesn't mean ALL 06 owners need it.

Keep up the good work though.

 
I've never experienced the problem you are talking about. Have been able to ride around with no problems what so ever at low speed. Even before I did the center spring mod. PM. <>< :)
Well, yes you can do it, but it takes an extreme amount of throttle control, and very little throttle movement on the 06 translates to a huge amount of RPM change due to the progressive pulley at the lower end.

Many riders adjust to it, and you may not notice it after a while, but you really don't have good (precise) control of the engine RPM in the first 1/4 or 1/3 of throttle movement. A movement as little as 1mm can vary the engine RPM by as much as 4K rpm in the lower ranges. A good rider can adjust to it over time, but that doesn't make it right.

Fred, you seem to be on a crusade with this issue. Have you ever considered that it is a non-issue for many 06 owners? Perhaps there are other conditions leading to the symptons besides the pulley, such as a lean fuel injection curve, or even a combination of factors which makes your FJR worse than most. Or, perhaps your are just more sensitive than most. It matters not. I am not knocking your efforts to fix a problem that you, and others perceive. Good on you for coming up with a creative solution to your problem.

But you seem to be hyper-sensitive to the issue and needing to convince others they have a problem when they say they don't. When others claim they don't have an issue, you seem to think they do, but they have just learned to live with it and it's still there and a problem. Who are you to tell them what they are experiencing? Perhaps it doesn't take them "an extreme amount of throttle control" to operate their FJR smoothly. Perhaps they do have "good (precise) throttle control". Perhaps FJRs are different in this respect. Perhaps its all the rider. Most likely a combination of both.

Your an intelligent, and helpful guy who came up with an ingenious fix to a problem you perceived with your FJR. But may I suggest you stop trying to convince everybody the sky is falling? Don't take this issue so personally. Just because some don't agree with you on this issue, does not make their own experience or opinion any less valid or accurate. No doubt your creative fix will help some, maybe even many. But that doesn't mean ALL 06 owners need it.

Keep up the good work though.
Goddamn I hate agreeing with you, Skoot, ( :) )but your analysis is spot on...and applies equally to the "50mph Wobble" I've written about. Sure, 100% of every FJR I've ever driven wobbled at 50mph like Foster Brooks on ball bearings, but enough folks have replied their FJRs DON'T wobble, so the issue certainly ISN'T a model-specific problem, as I'm sure the '06 throttle isn't a problem with every FJR out there.

Oh, BTW -- :****:

 
Top