[QUOTE=Twilight Error;20340721]I found the expensive surprise!
Burned exhaust valve: Upper left head.It isn't visibly eroded, but it isn't liquid-tight when I put some Kerosene in the passageway. The other three exhaust and all four intake valves are fine. /QUOTE]
How about maybe just a piece of carbon stuck under the one valve since the others are all good
Cheers...John - 2004 BMW R1150GS, 1978 R100 (G/S to be - builder)
Bikes That have Moved On:
1978 Suzuki GS550E, 1978 Kawasaki KZ1000P, 1982 Honda XL500R, 1995 BMW R1100RSL