SOURCE: i have an 85 honda
you have several vacuum hoses this is the ideal place to start.
In particular there is a approx 15mm o/d hose coming of the inlet manifold check it for leaks.
It runs down between the intakae manifold and throttle bodies.
SOURCE: theres alot of smoke coming out the exhaust pipe
Sounds like the crank case engine oil level is too high. Ovefilled, Two or 4 stroke?
SOURCE: starts rough,doesnt want to stay running when it
you definitely have a head problem. either a cracked head, or a blown head gasket. the white smoke is actually the coolant/water leaking into your cylinder and burning. remove the head, or have a tech. remove it, and have it resurfaced and pressure tested at a machine shop. when thats done, you can have it reinstalled with a new gasket, and that will fix your problem. I cant stress enough how important the machine work is...your head is aluminum, and aluminum heads tend to warp if theyre expsed to too much heat.
SOURCE: was driving on highway when engine started smoking
It's probably dead, but only a mechanic can tell you for sure.
SOURCE: THe bike starts and runs
You are dealing with a rich condition when you get the white smoke. If you park the cycle on the side stand , then start it you will get the traditional puff of smoke which goes away after a minute. In your case you have either a sunk float or stuck/dirty/worn float needles. Ethanol fuel is very hard on black plastic floats and has been known to ruin them on a regular basis.The floats and needles have been replaced on all three of my GL1000's. The only proper fix for the condition you describe would be to pull the carburetor rack out the motorcycle, disassemble, clean the carburetors, and replace the both the floats and the float needles. This should restore the GL back to smoke free, except of course when you park it on the side stand.
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