Have grey smoke coming from rear pipe. Noticed carbon where gasket is between jug and rocker box. Would new gasket remedy problem possibly?

 

White grey smoke is usually oil burning. Its possible in could be the headgasket allowing oil to be sucked in. The gasket between the head and rockerbox usually just makes a mess when it leaks, Its possible it could run down to the exhaust pipe and cause it to smoke but I doubt that is the problem. If you have to pull the head anyway you might as well check the condition of the rings and valves while your at it.

 

could the carbon or leak be between the cylinder and head?

 

The oil or carbon is coming out where the gasket between rocker box and cyl.

 

have you tried to tightened the fasteners for the rocker box and head bolts?
is the rear plug fouling?

 

I checked plug. Runs rich w/ s+s super e carb. (brand new). Have autolite plugs.i tried tightening them best i could but frame makes it diffucult to get at.

 

how does the bike run at operating temp. @ highway speed?
does the smoke from the pipe get worse when you come to a stop?
I am amusing when you say smoke from the pipe it is coming from the outlet and not from oil leaking on it?

 

Bike might lose a little h.p. @oper. Temp. @ h.way speed almost unnoticeable. Exactly! Smoke gets worse when i am idling @ stops. When i feather the throttle @stops more smoke emitts.

 

sounds like exhaust guides and or rings but rings usually cause smoke all the time..
Shovel heads are notorious for taking out the exhaust guides.

 

should have asked how long's it been since the top end has been rebuilt?