I think there is some misunderstanding here. The barrel is Sleeved, and so you just need to fit a new cylinder sleeve and you can bore to whatever recommended standard & oversize size you wish without changing the Barrel.
The funny thing is that Wiseco make a replacement sleeve too. I believe it is in the UK catelog at £58.01 (part YA814SL). I don't know the price or availability from Yamaha.
Does this make sense?
Ciao, Geoff
|