Odd problem with my carb

Got a odd problem. My idle is way too high. Nothing seems to help.
Changed jets, carbs, new throttle handle, changed the idle adjustment screw.

The bike runs flat out I can cruise at 32-35mph my top speed is 39mph.

Any ideas?

Thanks it does seem like the throttle cable is getting bound up somewhere, it's kinda moot now though. I killed the old girl last Tuesday.

I was going flat out and felt a hiccup and bang and she quit. Didn't freeze up but no go, not even try to go. I swear I saw a spark or flash out the left side of the engine.

I took off the chain and peddled her home. (damn these things don't peddle all that easy! It works but it's not my 21 speed Townie for sure!)

Everything is tight and secure, except the case has a leak and I must be loosing some compression. The head gasket is clean, the carb is tight at both ends, the exhaust is tight and secure. Yeah I got fuel, have yet to verify spark.

But damn my top end is dynamite, a few minutes before she blew I was at 40.1 mph!
It takes several seconds and a hill but my top end is as fast as I want to go on a bicycle!
The idle is just weird, won't idle when cold, better as it warms, until at operating temp she races. If I stop for more than a few minutes, the pattern repeats.



Sigh,,if it's not one thing it's another.

crassius said:

could be you blew out the head gasket, but also could be a crank seal

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Crank seal for sure, there is a small puddle of oil leaking from the bottom of the engine. The head gasket is fine.

Thanks that makes a lot of sense! My brother just called and he checked and I don't have any spark!
Tomorrow I'll take the magneto off my spare engine and see if that does it.
Woo Hoo!

wan37 said:

That true what the other people said in here .I would check the cylinder and piston that you didn't put any harm on them.So you will have too pull head off again and check the stuff.I would torque the head bolts with a torque wrench when putting it back together.I totally agree with Bikeguy goe's

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Since I'm at work and my bike is at my brothers, he's been doing some trouble shooting.
No spark and he took the cover off the magneto and it looked fine, he said it was clean and didn't have any shorts. (no oil had leaked into magneto chamber.) When I checked the head gasket the cylinder was fine no scoring or scratches. I've replaced the head and re-torqued the bolts. The plug was a brownish tan and didn't seem to be running lean.

I wonder if the spark I saw came from the CDI? I have a spare and I'll put it on tomorrow.
Stranger and stranger said Alice.