throttle issues...

[lady flyin' low]

so at first i really didn't seem to mind/notice that the throttle on my FZ is very jumpy. for instance, if i roll on the throttle...let off a bit and roll onto it again it sort of jerks...

this happens mostly at low speeds and i'm pretty certain its not user error bc i switched bikes (rode around on an SVS) for a while and had no problem at all.

is this a common thing for FZs/yamahas? and if so how do i fix it? i think the jerkiness is what makes me nervous doing low speed turns and even some sharp cornering for fear that i'll buck myself into the pavement

thanks

[TLRMan]

so at first i really didn't seem to mind/notice that the throttle on my FZ is very jumpy. for instance, if i roll on the throttle...let off a bit and roll onto it again it sort of jerks...

this happens mostly at low speeds and i'm pretty certain its not user error bc i switched bikes (rode around on an SVS) for a while and had no problem at all.

is this a common thing for FZs/yamahas? and if so how do i fix it? i think the jerkiness is what makes me nervous doing low speed turns and even some sharp cornering for fear that i'll buck myself into the pavement

thanks

I know there was an issue with the FZ1's
It could be just slack in your throttle cable too...
Get a Powercommander...... and you know where to go....

[schleppy]

I'd check the throttle cable adjustment, that can make a difference.

Also see if your bike has a TPS adjustment. That could be out of whack too. Mark adjusted the TPS on my SV and it made a HUGE difference in low-rpm smoothness.

Edit: Found it. Print this out and visit Mark: How To: Throttle Position Sensor Replacement - Sportbikes.net

[obsolete]

I know the SV's have a TPS "problem". I have yet to adjust mine, but that may be a place to look.

[TLRMan]

I normally check the TPS, when I do the usual magic stuff....

[Jenni]

is it jumpy @ idle? maybe the coils or the sparks, too. mine did something similar before i realized there was a recall on them.

mine's having a tps issue at the moment. i'll end up cleaning it either this weekend or next. not sure where stoneham is... but if you wanted we can make a garage day out of it.

[butcher bergs]

I know there was an issue with the FZ1's

The 2006's

It could be just slack in your throttle cable too...

That's exactly it. 3mm of play.

[spicy]

hers is weird though, cuz it doesn't feel like it's a mapping issue. also doesn't feel like there's an enormous amount of slop in the cables, either. if i had to articulate it somehow, i'd guess there was an eccentric cam on the throttle tube or the spring has a variable rate -- quite strange...

[richw]

fz what fz1 supposedly had bad initial throttle maps

Almost any aftermarket injector would cure that problem though
ps thank the EPA

[TLRMan]

fz what fz1 supposedly had bad initial throttle maps

Almost any aftermarket injector would cure that problem though
ps thank the EPA

Bergs said it was the 2006's...I know a guy, that had his bike screw up when he was leaned over, and ended up crashing!

Several times he had it back to the Dealership to have the throttle glitches resolved to no evail.

He now has a brandy new Bandit 1250 and loves it.

I'm sure a PCIII would have sorted it out...
They are all mapped lean at cruising RPMs anyway.