hi all, well its starting to happen, the carby probs i hear people whinging about are finally starting to happen to my bike. for example, when i hold the throttle fully open from idle, the tacho needle jumps straight to about 11-12000 rpm, hesitates for a microsecond (but long enough to notice) then continues up to 18000rpm. also, when travelling real slow in traffic (below 3000rpm) for extended periods, the bike will fuel up, and will flood itself. When i start it back up if i rev it hard, i can see the unburnt fuel coming out of the exhaust. i didn't want to, but i may have to take it to a mech to get it fixed properly cause there is no way im touchin those carbs! any ideas on the prob? does it sound like the carbs, i think it does. any one know a reliable reputable mech in syd area? thanks Greeny
<!-- m --><a class="postlink" href="http://www.castlehillmotorcycles.com.au">http://www.castlehillmotorcycles.com.au</a><!-- m --> The owner there is called Michael, he balanced my carbs on my fzr so he knows about them, and my bike runs nice and smooth He also tries to keep the price as low as possible. Tell him Fletch sent you.
thanks heaps fletch. <!-- s --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt="" title="Very Happy" /><!-- s --> step, after fiddling around with the exup i think that is what the lag is. If i loosen the exup right off, the 'hiccup' happens about 14000rpm, whereas if i tighten the exup, it occurs around 8000rpm. Maybe it is the exup.
Hey Greeny, maybe try wiring the exup value fully open and take the exup cables off and see how that goes.. i run my bike with exup fully open and it works just as fine
My exup valve itself was heavily 'carboned' which affected its ability to open cleanly. Took it out (took off all screws, then gradually wedged it out), took a metal file and files the leading edges of the valve, and then put it back it. It was an easy fix once the valve came out (but it really didn't want to). It is not a delicate piece of machinery so you don't have to worry too much about damaging it. It seemed to make a difference...
I have just been through the same thing, had a real bad dead spot at about 10000rpm. Found it to be the exup valve not opening early enough. The exup valve should be adjusted so the little hole in the side of the valve lines up with the hole in the body. I jamed a 4mm pin punch into mine and then adjusted the cables....... WOW, what 15 minutes well spent work can do. There is details on this site somewhere with a picture from memory. Nathan