On my 99 I have a persistent issue of the left hand exhaust coming becoming loose at the cylinder head. It seems that if I turn it a little to the left or to the right the exhaust pipe tightens up. I have tried turning it more anti clockwise and it doesn't want to go past a particular point. The right hand exhaust nut undoes anticlockwise and does up again just as I expect and there are fewer threads visible when done up. Does this sound like cross threading on the left?
Dommies don't generally have…
- Log in to post comments
Where head threads are…
Where head threads are damaged from the pipe flange chattering against the last threads nearest the valve ,i have used a thicker gasket from a large Suzuki to bridge the damage . Rose nuts can be tightened more once head hot . Clean carbon from all threads .Where large diameter pipes ( usually Atlas or early 650) are tight in the rose due to bend ,the inside of rose can be opened out with a rotary tool or lathe.
- Log in to post comments
Dommies don't generally have the same problem with loose exhaust nuts as the isolastic suspended Commando. They have conventional clockwise threads. Something inside must be distorted. I'd try penetrating oil to lessen the damage, and unscrew it the normal way. Then find out. One of mine often tries to go wrong - but not far before I start all over again and get it right. Nuts do need very careful alignment. I always assemble with copper grease. Some say that's wrong but it's always worked.