Riding the other day and it started having a bad idle, sluggish low end and would not idle with the idle screw all the way in no matter where the air screw was. So later in the week I decided to clean the carb. Took it apart and blew all the jets and neddles real good with WD-40. Made sure every passage and hole was free of debry witht he wd-40 straw, nothing was cloged up. The guy I bought it from put a knn filter on and wasn’t clean, there was a lot of grit in the intake under the filter so I cleaned that and recharge my knn. I also sprayed wd-40 in the reed cage. I put everything back together and this is where my real problem started. Wouldn’t start, Turned gas off then tride to start it thinking it was flooded. Finaly got it started with the gas off then turned the gas back on as it was running. As soon as I turned the gas on it loaded up realy bad and died with a lot of white smoke. I thought ok its just flooded with wd-40 so I turned the gas off agen and it started after a few kicks but had to hold it full throttle to get it to clear out befor it would run. Turned the gas back on and it died agen. Done this repeatedly. It would start with gas off, as soon as I turned gas on it would load up realy bad and die with a lot of whit smoke. I could keep the gas shutoff valve in-between on and off and it would barley stay running with a lot of smoke. So I though “ok” I put the carb back together wrong or left something out. I took the carb back apart and looked at the carb parts breakdown to make sure I had every little part there, besides all I did was take the bowl off and the pilot and main jet, so ther wasn’t a lot for me to screw up, I even made sure I didn’t bend the floats. The carb looked good for the second time so I put it back on. Next I took out the spark plug and ofcourse it was black. So put in a new plug, Started it agen and same thing A lot of white smoke, sputter and if I turned the gas all the way on it would not stay running. I know what ur thing “ I put the carb back together wrong” but Im convinced that I didn’t, like I said all I took of was the bowl and two jets, put everything back just like it was. The carb is sealed good around the boot. I read on other threads that bad crank seals could cause probs similar to mine. But so suddenly? Oh I havnt checked the reads. I could see in there with a light and they looked ok, I could also feel with my finger. So what do I check next? Take the reeds out and inspect them could they cause this? Or possibly crank seals? Oh and it has the same gas in it when it was running ok. For sh*ts and giigles here is the specs. 2002. Fms pipe, power core 2 silincer, 28mm mikuni carb, 270 main, oil block off kit, boyesen reeds, reed spacer. Thanks for your help.
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