Thanks BB.

I had a muck around with the twin rail today. Removed the motor. The rails look perfect. I investigated the alignment issue. Couldn't seem to get the engine shaft pointing anywhere near the right direction (ok an exaggeration it was about 5 mm out). Realised the chain tensioner might have been stopping it pointing in the right direction if the chain was too tight. Slackenened this off and all seemed good. Checked the runout on the clutch body whilst still attached to the motor. Was about 6mm. ?????????

Took the clutch body off to find a stuffed woodfuff key and a cotterpin that does nothing (removed key put clutch back and and then tightened cotterpin - did nothing). Lots of slop on the crankshaft. I span the clutch body on the crank without the woodrff key nd it appears square. Looking at the engine parts list is shows two diameter cluch bodies. It seems my clutch body is the bigger size and the crank the smaller size. Does this sound right? is there a bush or similar available?
Any suggestions? BTW Iput my micrometer away somewhere really safe...........So safe even I can't find it
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Last edited by Mark1; 22/10/15 11:23 PM.