Yeah, not on a tatty 220kg poor mans RC45 that's for sure, if you've got to spend £6000 or so on a Yam (and there's no reason at all to do even that), make it a good one like this, offered for £6k right now c/w totally fresh engine on two-strokes.com.
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Please do not PM me technical questions, if you can't find it on the Forum start a thread