chris_s wrote:Is that the only real area of concern in the bottom end?

It's a 2 stroke, the whoe thing is a concern

But yes youre right, its only really the crank you need to worry about. barrels can be replated, pistons can be replaced as can most other running parts.

The new crank however is an exspensive bit of kit and finding a good second hand one is very hard.
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If I have to take the carbs off once more...