thank you for your reply,but after close examination of the noise I decided to take off the head.Big ole problem.One of the exhaust seats had fallen out into the path of the piston and cracked the head.Tried to find used one,no joy.New one £550 plus vat.
decided to get old one welded,redrilled and gas flowed.Should be back soon.This is a common problem apperently , Dommies are prone to running hot(so I am told)mine was caused by a split in the seperator between manifold and carb.Cheers for replying.mike
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