High RPM...

[vtmando]

Thought my problem was a sticking throttle but after cleaning and lubrication it snaps right back just fine.
When I engage the clutch in gear it stops the  hight RPM and drops to a normal idle...when riding shifting between gears the RPM's stay high... any ideas?

[Barry]

Could be the ignition advance mechanism is sticking on full advance and not returning to the idle setting. You could try lubricating the mechanism via the small oval plate in the side of the bean can.

Observe the ignition advance with a strobe lamp through the timing hole when the revs are elevated and then again when the idle speed drops.

[vtmando]

Thanks for the input Barry...I hate to sound so dense but what is the "bean can"

[georgesgiralt]

Bean can :
Disconnect the battery.
Remove the front engine cover by unscrewing the two Allen screws.
You'll find the bean can in the lower part of the engine front.
It contains either the points (bike made between 1978 to 1981) or an Hall effect sensor to serve the same purpose (bike made after year model 1981 to end of production).
Reassemble in reverse.
Try no to destroy the oval shaped aluminum cover. It is useful preventing grime going into the bean can....  and put it back after lubing.

WD40 is not good at lubricating but you can try this first. If it does the  trick, IMHO you'd better remove the bean can, and dismantle it for cleaning, lubrication and adjust. But if you go this route, bear in mind you will have to set the timing point properly on reassembly on the bike. So mark the original position to have the bike start and have a strobe timing light available to fine tune....


Edit : corrected typo

[vtmando]

Great information !! Thanks so much...I'll get to work on it...hopefully step one in cleaning with correct the problem.

[Bob_Roller]

If the problem still exists, performing a carb synch when the engine is not up to operating temperature can cause this as well . Also check valve clearances especially if you are going to do a carb synch.