I did wonder about the space in the crankcases, but it may just go in with some careful 'persuading'!

I so far have 14T, 15T 36T 38T 41T, 42T and a 45T but with the SP gearbox it's all gone to pop!

Will research some more on the 16T front if its available!
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More **** two strokes than you can shake a **** stick at.