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Old 09-27-2012, 10:51 AM   #21
Dave in Wi
Beastly Adventurer
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Joined: Feb 2007
Location: Madison WI (40 Square Miles Surrounded By Reality)
Oddometer: 2,030
Originally Posted by jordan325ic View Post
Well, maybe it's not a throttle issue?

Today I rode the bike and twice I was coming to a stop with the clutch in and the bike started revving very high. Gave it a few tugs of the throttle and it just kept on revving, if anything it seemed to go higher (tach is dead so not sure exactly how high it was revving). So I hit the kill switch, it kept running like I hadn't done anything. I turned the key to the "off" position. Still kept revving. The only way I could turn it off was to stall it out by releasing the clutch suddenly.

Not really sure what's going on with that. Any suggestions?
I am no two stroke expert, but I believe that indicates that one of the crank seals are leaking. Letting in unmetered air and it continues to pull in gas through the carb even with the throttle closed. Someone with intimate DT knowledge can probably even tell you which side it is, as I recall one seal goes to the transmission, the other does not so that's probably the one leaking.

Why this happens even with the ignition off, I can't tell you. I have heard of it happeing and I'd like to know why myself.
Dave in WI
2002 ZRX1200R
1975 XL100
1988 DT50
"Daddy, it's five o'clock sometime!"
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