engine wont stop peek revving
#1
engine wont stop peek revving
Hey guys.
My LRP .21 was going sweet. then it started to keep on revving while jumping, or when running flat out and backing off the throttle.
Now it seams to be worse. If i have it on my starter box, and rev it up, it will peak rev until i hit the brakes. the carby is returning to its idle position, so its not getting stuck open. I have taken off the carby, and pull start and cleaned them up and tighten them all up, so i dont think its an air leak.
I have reset the needles to factory, and even changed to a different carb that was running sweet on another motor, but still the same problem.
Anyone got any ideas?
thanks
My LRP .21 was going sweet. then it started to keep on revving while jumping, or when running flat out and backing off the throttle.
Now it seams to be worse. If i have it on my starter box, and rev it up, it will peak rev until i hit the brakes. the carby is returning to its idle position, so its not getting stuck open. I have taken off the carby, and pull start and cleaned them up and tighten them all up, so i dont think its an air leak.
I have reset the needles to factory, and even changed to a different carb that was running sweet on another motor, but still the same problem.
Anyone got any ideas?
thanks
#2
Tech Elite
iTrader: (12)
Hey guys.
My LRP .21 was going sweet. then it started to keep on revving while jumping, or when running flat out and backing off the throttle.
Now it seams to be worse. If i have it on my starter box, and rev it up, it will peak rev until i hit the brakes. the carby is returning to its idle position, so its not getting stuck open. I have taken off the carby, and pull start and cleaned them up and tighten them all up, so i dont think its an air leak.
I have reset the needles to factory, and even changed to a different carb that was running sweet on another motor, but still the same problem.
Anyone got any ideas?
thanks
My LRP .21 was going sweet. then it started to keep on revving while jumping, or when running flat out and backing off the throttle.
Now it seams to be worse. If i have it on my starter box, and rev it up, it will peak rev until i hit the brakes. the carby is returning to its idle position, so its not getting stuck open. I have taken off the carby, and pull start and cleaned them up and tighten them all up, so i dont think its an air leak.
I have reset the needles to factory, and even changed to a different carb that was running sweet on another motor, but still the same problem.
Anyone got any ideas?
thanks
#7
Sounds like a clutch isssue. Shims might be off. Or the shoes have melted and the ends are sticking to the clutch bell. Try grinding the shoe. Let us know what happens.
#10
thats a Picco...i bet it has a leaky carb seam !
#11
I had the clutch off, the shoes didnt seem worn. The clutch bell had 2 groves worn into it from teh shoes, and a ridge left from where the shoes have a gap for the shoe springs. is this normal?
#12
Tech Regular
iTrader: (4)
Join Date: Dec 2008
Location: CRESCENT CITY CA. NORTHERN TIP OF CALIFORNIA
Posts: 395
Trader Rating: 4 (100%+)
LRP
Doesn't sound like a clutch issue in the first place. Take Houston and Maximo's advice and check that first. These guys are engine masters.
#13
Tech Elite
iTrader: (89)
I had a similar problem. Check the rubber boot on the carb. When my carb was closed everything was normal as soon as I reved the engine it would wind out; I found a small cut in the rubber boot. but would only surface when the carb was open exposing the cut.
I believe you have air leak.
I believe you have air leak.
#14
I had the same problem on my B5. Even changed carbs with a buddy who had the same engine. Same thing would happen even with my buddies carb on. Back plate looked fine. Changed fuel line. Could never figure out the problem. So I hope you can find the problem and share.
Thanks
Thanks
#15
Tech Prophet
iTrader: (96)
I had the same problem on my B5. Even changed carbs with a buddy who had the same engine. Same thing would happen even with my buddies carb on. Back plate looked fine. Changed fuel line. Could never figure out the problem. So I hope you can find the problem and share.
Thanks
Thanks