James Hickman wrote:....I also have an exhaust leak at the cylinder head and am wondering if it is entraining air enough to make a difference. Mine doesn't have a gasket so I guess I may have to have the barrel and head lapped...
A leaky head joint or a leaky exhaust pipe joint??
Head joint blowing (if it doesn't have a gasket) usually leads to things getting too oily rather than problems with the mixture - but in either case I'm pretty certain I could find some people (not all, but some) who would recommend that you used some sealing compound in the first place!
'55 Huntmaster, '56 VH, ' 51 VH, '80 R100RT, '00 Sprint ST (but all those Ariel parts can only make one running bike...)