Fixed the Herky-Jerky Throttle

[papa woody]

Last Saturday I rode the FJR over to see Fred H. and get some help on the throttle weirdness I had. Fred and I did the Barbarian jumper mod, the CO adjustment, the center throttle spring release, and the Fred H. throttle pulley modification.

For any of you on the fence about the Fred H. pulley mod, let me just say this: It flat works! The difference in ridability and throttle control is like night and day. It works now like it should have from the factory. Riding the bike through twisties is now a pleasure instead of the chore it used to be because the throttle picks up nice and smooth when you get back in the gas coming out of a turn.

Anyway, I'm not trying to sell anyone on this mod, just reporting my findings and putting another data point out there. If you're not happy with the throttle action on your bike, you might want to give this a try. It's easy enough to undo it if you don't like it.

Adios....

Woody

 

[jefcrouch]

Where does one find the Fred H. pulley mod? I've attempted a search with no luck.

Thanks

Last Saturday I rode the FJR over to see Fred H. and get some help on the throttle weirdness I had. Fred and I did the Barbarian jumper mod, the CO adjustment, the center throttle spring release, and the Fred H. throttle pulley modification.
For any of you on the fence about the Fred H. pulley mod, let me just say this: It flat works! The difference in ridability and throttle control is like night and day. It works now like it should have from the factory. Riding the bike through twisties is now a pleasure instead of the chore it used to be because the throttle picks up nice and smooth when you get back in the gas coming out of a turn.

Anyway, I'm not trying to sell anyone on this mod, just reporting my findings and putting another data point out there. If you're not happy with the throttle action on your bike, you might want to give this a try. It's easy enough to undo it if you don't like it.

Adios....

Woody

 

[Bounce]

Thanks for the update. I've not been back under the tank of my 2003 since Fred first posted about the asymetric pulley. I'm still thinking that the pre-2006's were also asymetric. My guess at this time is that the Yamaha exagerrated it in 2006.

 

[radman]

Where does one find the Fred H. pulley mod? I've attempted a search with no luck.Thanks

Pics and stuff

 

[teerex51]

OK, is there any point in doing the Fred H. mod on a 2004 FJR?

(And - while I am clear on the procedure - I confess I still don't understand what it does.... :ermm: )

Rad, Bounce whadaya say bros? :help:

Stef

 

[Warchild]

OK, is there any point in doing the Fred H. mod on a 2004 FJR?

No, there is not.

 

[quicksilver]

So the throttle cable rides on a copper shim?

Isn't that an abrupt transition right at the end of the wire?

Why is that a good thing?

It seems like the cooper would wear quickly if it gets squished with every throttle turn.

Hopefully the cable doesn't wear prematurely to.

Maybe I'm not getting it yet.

Summary:

Put a wire shim in the throttle cable guide to increase the diameter of the guide at the wire contact point.

Bigger diameter makes it is less sensitive to throttle cable movement.

Is that the jist of it? I'm trying. Maybe I'm just slow.

If I got it right, WHY does this work?.

 

[Maywannayamaha1300]

Can someone give us 2006A owners a step by step for the barbarian jumper mod (Done on a 2006 specifically) ? Do you have to remove the dash board ? We're still going by an old set of instructions that was on 2003 bike.

 

[Warchild]

Can someone give us 2006A owners a step by step for the barbarian jumper mod (Done on a 2006 specifically) ? Do you have to remove the dash board ? We're still going by an old set of instructions that was on 2003 bike.

Did you look at the current thread entitled: Barbarian Jumper Mod on 06?

 

[bmwhd]

So the throttle cable rides on a copper shim?Isn't that an abrupt transition right at the end of the wire?

Why is that a good thing?

It seems like the cooper would wear quickly if it gets squished with every throttle turn.

Hopefully the cable doesn't wear prematurely to.

Maybe I'm not getting it yet.

Summary:

Put a wire shim in the throttle cable guide to increase the diameter of the guide at the wire contact point.

Bigger diameter makes it is less sensitive to throttle cable movement.

Is that the jist of it? I'm trying. Maybe I'm just slow.

If I got it right, WHY does this work?.

Yes, it rides on the shim. The end-of-the-wire transition is a non-issue as the shim extends far enough that the cable is still on it at full throttle.

As for wear, I've not seen any. That 12 ga. stuff is thick enough that it will take a long time to wear through but the copper gives enough that it won't eat into the cable (at least so far )

 

[SkooterG]

Anyway, I'm not trying to sell anyone on this mod, just reporting my findings and putting another data point out there. If you're not happy with the throttle action on your bike, you might want to give this a try. It's easy enough to undo it if you don't like it.
Adios....

Woody

Thanks for the info. That's what this forum is all about.

Next time you see Fred, tell him to come back and play with us. Seriously.

 

[temp357]

Anyway, I'm not trying to sell anyone on this mod, just reporting my findings and putting another data point out there. If you're not happy with the throttle action on your bike, you might want to give this a try. It's easy enough to undo it if you don't like it.

Adios....

Woody

Thanks for the info. That's what this forum is all about.

Next time you see Fred, tell him to come back and play with us. Seriously.

+1!!! Thx Woody!

 

[Toecutter]

Next time you see Fred, tell him to come back and play with us. Seriously.

I think he's been busy with the Givi LED light kits. I'm gonna email him and ask about his opinion of the effectiveness of this mod for a pre-'06.

 

[Bounce]

lemme guess. you two have picture phones and you're going to do this to watch his head implode. right?

 

[ionbeam]

I'm suspecting that the side stand dog pile really got to Fred. Youse guys really out did your selves there. Some of the pilers that have signal minders to help them with remembering to turn off the perpetual blinking signals got on him because Fred (plus many more) was too pathetic and inadequate to put the side stand all the way down. Just my opinion on why we haven't heard from Fred except for the Givi lights. I'm not sure the side stand dog pile moved the Forum forward in any helpful way.

Back to the Herkey-Jerky Throttle topic sans Fred.

 

[Ari Rankum]

I'm suspecting that the side stand dog pile really got to Fred. Youse guys really out did your selves there. Some of the pilers that have signal minders to help them with remembering to turn off the perpetual blinking signals got on him because Fred (plus many more) was too pathetic and inadequate to put the side stand all the way down. Just my opinion on why we haven't heard from Fred except for the Givi lights. I'm not sure the side stand dog pile moved the Forum forward in any helpful way.
Back to the Herkey-Jerky Throttle topic sans Fred.

I missed that one. I like being the victim of a dogpile; it's almost as much fun as bumper cars.

 

[NovaFlyer]

I'm not sure the side stand dog pile moved the Forum forward in any helpful way. - Ionbeam

+1. That thread was the first time I had some second thoughts about this forum. Definitely not one of it's better moments. <_<

Thankfully this doesn't happen regularly, but the Forum lost a valuable member as result of the last incident.

 

[vmaxed]

I'm suspecting that the side stand dog pile really got to Fred. Youse guys really out did your selves there. Some of the pilers that have signal minders to help them with remembering to turn off the perpetual blinking signals got on him because Fred (plus many more) was too pathetic and inadequate to put the side stand all the way down. Just my opinion on why we haven't heard from Fred except for the Givi lights. I'm not sure the side stand dog pile moved the Forum forward in any helpful way. Back to the Herkey-Jerky Throttle topic sans Fred.

The way the Administrators treat him,what would you expect.

 

[S76]

As much as I would like to get on my soap box and rant about how badley Fred was treated, I mean, after all he is a smart guy that loves to tinker and share what he learns, and why was it he was treated so badley....but I won't go there.

Fred's pulley mod is like this:

The 06 (I don't know about the rest), has an anti-progresive throttle response. By this I mean, if you twist the throttle grip 1/4 of the way open, the throttle plates on the engine are over 1/3 of the way open. So very little throttle grip movement coming off idle, (like in the middle of a turn) opens the throttle plates in the engine quite quickley, and more than you expect. (Enter the jerky throttle.) Fred's mod, (did I mention how smart this dude is), placing a piece of wire in the pulley groove, basically increases the diameter of the throttle cable pulley on the engine, thereby slowing down the throttle action. After installing Fred's wire mod, the throttle is almost linear. 1/4 of a twist of the grip will equal 1/4 of the throttle plate opening, rather than 1/3 like it was before. More managable. More predictable. More betterer.

I have my own variation of Fred's wire mod in that instead of using a piece of wire in the pulley groove to increase the diameter I used a piece of an O-ring. It was hard for me to get the wire in there, (anything that takes more than a minute and I'm out of patience). I used an o-ring that was .115 dia. and about 2 inches round. Cut the end on an angle to make a ramp for the throttle cable, locked the throttle wide open, (works best with the engine off), stuffed the oring in the groove tight against the cable and pressed it in the rest of the exposed groove with a screwdriver and then cut off the excess. This was very quick and easy and the oring is a squish fit so it can't come out. At least it hasn't for the last 8,500 miles. Of course you now need to readjust the throttle cable slack as it will be too tight.

But, like the original post said, you really need to do 4 things:

Throttle Spring mod

Throttle cable slack Adjustment

Barbarian mod

Pulley mod

These are all very simple things that can be accomplished in less than an hour and will transform your bike into a dream to ride. As docille as you want it, as agressive as you want it. Now you can decide.

But, then again, maybe the others on the board are right. Fred is full of s&*t. It's all operator error. The bike is perfect from the factory. People that have issues are just whinners. Yeah, I guess that could be it.