Maintenance & Technical > KX500 Original
K5 vibrates real bad.
dirkster:
Foxx4Beaver, i'll try and do a leak down test tomorrow to be sure they are sealing. also after running the bike, before i found the bad wire, it ran hot but the plug was wet and black. now that the signal wire isn't getting grounded out on the crank, the bike runs much more consistently at higher rpm and the plug returned to being a darker tan and not wet after riding.
Foxx4Beaver:
you're probably good to go now....
but still, a leak down test is always good practice on a fresh rebuild...cause there's always the chance something didn't seal, then you could fry it, and then have the misfortune of tearing it all back down, and spending all that money a 2nd time.
dirkster:
update, leak down test was helpful there were 2 leaks at the cylinder base, got a new gasket and no more leaks. bike still runs bad. noticed that the exhaust was leaking quite a bit at the cylinder, got new o rings and didn't make a difference the cylinder was actually warn out where the pipe seals and i couldn't get any o-ring to seal right. used a roll of teflon tape on top of the o-rings and no more leaks. i was hoping that that would solve the poor running issues and bad vibration. no such luck. runs well at low rpms very responsive to throttle. once you try to get on it fells very dogish and rough. did a spark check seemed weak but made a 1/4" gap and it still sparked so no weak spark. hopefully its just down to jetting now. looked up a jetting chart and it calls for a 175 main at my elevation of 800 and average air temp 50f the bike has 62 idle 175 main already. any recommendation for jets. engine work is as follows, wiseco .5mm over piston, sleeved cylinder, full port and polish, v-force 2 reeds, fmf fatty, dg muffler, thin head gasket.
Foxx4Beaver:
That jetting sounds painfully rich for that altitude.
If it were me...I'd throw in a 58 Pilot to start, then throw in a 170 Main.
What slot is the Needle clip in?
I'm willing to bet, you'll end up having to go even a little more leaner than what I just suggested....but start with that.
Foxx4Beaver:
Another possibility, not to trash whomever did the port work...but it could be out of whack, and not done properly.
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