I would think it is due to the LM, the reason it Revs in the start position, is becase that position acts as a choke, giving it a rich mix.

However, Being am LM, the main jet will be the wrong size, and just wont be giving it the guts to go when the choke is off.

I will be around next week with a G4 Body for you, that should fix the issue.

Cheers
Ty

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