Tuning my fizzer

[TonyB]

[QUOTE=celticno6]Hi guys. My fizzer has started to feel a bit rough in the last couple of weeks, and I'm hoping one of you guys will be able to point me in the right direction and hopefully save me some time.

Symptoms:

Really rough idle, needs a lot of choke to stop it from stalling, won't idle below about 2500 rpm.

Seems a bit "woolly" on the first bit of the throttle, but once it gets to 4000 its like it clears its throat and gets going.

I'm thinking it could be seals in the carbs stopping a perfect vacuum, however I'm open to any possibilities.[QUOTE]

I have only had time to read your original post, so appologies if this has already been said: Not quite the same problem as mine, as my FZR1000 would idle roughly and would have a stuttering missfire up to 3k rpm. The problem was mostly caused by the slides in the CV carbs wacking fully open as soon as a bit of throttle was applied which reduced the vacuume to almost nil. I say 'mostly caused' because the problem isn't completely cured. The bike always works fine over 3k rpm. Another classic problem with the Mikunis in FZR's is the emulsion tubes (needle jets?) getting worn, which makes them run rich at low rpm, but this doesn't sound like your problem. Have a look at the slides.

[riffer]

Thanks Tony. Sorted a while ago. I have, however, introduced and mostly solved many problems to my bike since then.