Maintenance & Technical > KX500 Original
bike just doesnt seem right.
kelcrist:
howdy folks.
heres the situation im facing. i have a 92 that i have done a top end job on. i had the cylinder re-plated and used a wiseco piston. since then the bike just doesnt seem to run right. at first it had unstoppable low end power but no top end rev. i discovered that i had the power valves timed wrong so that cured that issue. it will now rev and still has decent low end but it actually sounds like it misses at low rpm. i have a 94 that runs completely different. i would consider it "normal" since my brothers 95 and my friends 97 all seem to run about the same. the timing is set at stock on all the bikes mentioned and the jetting is all similiar, within a size or 2. pipes differ a little, one stock, one fmf desert and one fmf woods. all in all none the bikes are mostly stock so im wondering what can make such a difference? any thoughts at all??
oh and i have not done any leak down or any tests like that.
jonny500:
when i was setting mine up i put some vids on youtube. i got a good response from the guys on here. i vid can describe things better than words imo
Polar-Bus:
--- Quote from: kelcrist on April 17, 2011, 03:42:03 PM ---howdy folks.
heres the situation im facing. i have a 92 that i have done a top end job on. i had the cylinder re-plated and used a wiseco piston. since then the bike just doesnt seem to run right. at first it had unstoppable low end power but no top end rev. i discovered that i had the power valves timed wrong so that cured that issue. it will now rev and still has decent low end but it actually sounds like it misses at low rpm. i have a 94 that runs completely different. i would consider it "normal" since my brothers 95 and my friends 97 all seem to run about the same. the timing is set at stock on all the bikes mentioned and the jetting is all similiar, within a size or 2. pipes differ a little, one stock, one fmf desert and one fmf woods. all in all none the bikes are mostly stock so im wondering what can make such a difference? any thoughts at all??
oh and i have not done any leak down or any tests like that.
--- End quote ---
Do a compression check first, you should be up around 150 psi . You also might have the KIPS gears incorrectly timed. I did this myself, and made my KX500 feel like a mellow 250 for mid top end power.
kelcrist:
i didnt do compression cuz as i said the rings are new and the cylinder is new. it will try and break your foot off if you dont have boots on when you start it. i do believe it is still in the kips valve. i was just wanting some fresh ideas before i buy another top end gasket kit.
wierdo:
Keep an eye on your kips actuator arm is still connected to the kips rod, mine has jumped off a couple of times, im still trying to work out if its over rev when missed gear upshifting or could also be over rev down shifting ( large tree jumping out in front of me).
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