Well I measured Fontyyy's before sending it back, and engineer friend was happy to make one for me!

All going well until his 3 phase packed up in the workshop. Bum.

Plan B, phone Dan and buy a complete mc18sp motor. Mad way to get parts but hopefully will have the 'new' parts once matey sorts his wiring out and I have some spares for the 'Wet' bike..
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More **** two strokes than you can shake a **** stick at.