ianjenn
|
| posted on 30/5/09 at 03:47 PM |
|
|
bike carbs zetec over revving at gear change
Hi All,
I have a zetec with zx6r bike carbs. The zetec is as standard except a burton flywheel. I have had the engine rolling roaded and it does run great.
The only snag I am finding is that when the engine is hot the engine will over rev when engaging the clutch to change gear. i.e say I am driving at
about 2000rpm in any gear, if I take my foot off the accelerator and depress the clutch the engine speeds up to about 4000 revs temporarily before
slowing down again. This only seems to happen at zero to 1/2 throttle. Am I right in thinking that I need to adjust the idle mixture (make leaner) or
should I adjust the holes in the sliders to reduce the vacuum and slow them down abit. Any thoughts?
cheers
alex
|
|
|
|
|
Dusty
|
| posted on 30/5/09 at 03:49 PM |
|
|
I think I would start with a stronger/extra throttle return spring on the bike carbs.
|
|
|
robbydee
|
| posted on 30/5/09 at 03:59 PM |
|
|
Deffinatly sounds throttle return spring, tight cable make sure it slides easily in the outer sheath...
|
|
|
ianjenn
|
| posted on 30/5/09 at 04:16 PM |
|
|
thanks, but I don't think it is the return spring as the linkage moves really easily and closes with a sharp snap after releasing the pedal and
also it only happens when the engine is hot say after about 5miles and it doesn't happen at 1/2 to full throttle.
|
|
|
rusty nuts
|
| posted on 30/5/09 at 05:27 PM |
|
|
Check the cable has clearance when the engine is hot. The heat may also be making the cable stick so try an extra spring to see if it cures your
problem.
[Edited on 30/5/09 by rusty nuts]
|
|
|
spud69
|
| posted on 30/5/09 at 07:37 PM |
|
|
I had similar with mine, if you look at the throttle wheel on the carb you can put another cable on the other side with a strong spring to pull the
throttle back to the stop.
Worked a treat on mine..Gives a better more positive feel to the pedal aswell
|
|
|
ianjenn
|
 posted on 30/5/09 at 08:08 PM |
|
|
well done chaps and thank you. You were spot on. I added another spring to the throttle return and it is working perfectly. I would have done some
silly things to my carb without your input.
alex
|
|
|
.jpg)
