Kamnahrt
08-16-2017, 08:17 PM
Hey guys,
So I have a few odd issue looking for some insight on. Bought a 1986 250R that had apparently been sitting for a while. The old girl starts 1st kick, idles fine and strong through the power band. Only issue was idle screw wasn't adjusting idle.
Pulled the carb apart and this is where it gets interesting. Turns out the pilot jet and air idle ports were/are varnished solid. But it somehow still idled fine.
Put the carb throw a couple cycles in the ultra sonic cleaner till she was clean as a whistle. Put it back together with a fresh carb kit, all factory jets(same that I pulled out) and reset the float to be closed when parallel with the bowl base (checked for flow stoppage as well, all good). Started it back up and anything less than 1/8-1/4 throttle it just dies. Lots of smoke and won't rev, clearly pig rich. Pulled apart and checked and rechecked assembly for human error, good Lord knows I'm normally at fault but no dice still pig rich and won't run.
He's the kicker for those that can bear my long winded issue, finally say screw it and put in the original pilot (still completely clogged) and like magic the thing is back to running like a top. And the idle screw is semi working again.
What on earth could be causing an issue like this? I'm not green on carb tuning but this has me turned around 6 ways till Sunday trying to find some logic in it.
Sent from my SAMSUNG-SM-G891A using Tapatalk
So I have a few odd issue looking for some insight on. Bought a 1986 250R that had apparently been sitting for a while. The old girl starts 1st kick, idles fine and strong through the power band. Only issue was idle screw wasn't adjusting idle.
Pulled the carb apart and this is where it gets interesting. Turns out the pilot jet and air idle ports were/are varnished solid. But it somehow still idled fine.
Put the carb throw a couple cycles in the ultra sonic cleaner till she was clean as a whistle. Put it back together with a fresh carb kit, all factory jets(same that I pulled out) and reset the float to be closed when parallel with the bowl base (checked for flow stoppage as well, all good). Started it back up and anything less than 1/8-1/4 throttle it just dies. Lots of smoke and won't rev, clearly pig rich. Pulled apart and checked and rechecked assembly for human error, good Lord knows I'm normally at fault but no dice still pig rich and won't run.
He's the kicker for those that can bear my long winded issue, finally say screw it and put in the original pilot (still completely clogged) and like magic the thing is back to running like a top. And the idle screw is semi working again.
What on earth could be causing an issue like this? I'm not green on carb tuning but this has me turned around 6 ways till Sunday trying to find some logic in it.
Sent from my SAMSUNG-SM-G891A using Tapatalk