Right those of you may know the saga, ole jesus has a car..track one, he had the gasket go, thats no longer a problem, if ya know the history, we changed, checked everythin, the last thing was the valve clearances and the c/o mixture, it was running like a dream...then out of the blue the same problem arises...the revs dropped and it struggles for fuel...now i have not changed a thing since or touched and it does this....., im thinkin the jets are picking up some ****eor maybe its something else.....man if i dont sort it out , ill go grazy , sell all my 5`s an my warehouse of parts and go jap....please help a struggling reno fanatic...