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Message: [QUOTE="quintwatson, post: 1221516, member: 66491"] Was following your thread as an observer.. Curious about SNB73's experience and others - does the Mo-Betta porting and 265 overbore normally require significantly leaner jetting? On my 01 RM265 I had to go from a 48 (stock) to a 40 on the Pilot Circuit and from a 162 (stock) to a 150 on the main to get it to run right. I'm happy with the power now, and I suppose that is all that matters. It just seems like a MAJOR correction to go 3 or 4 sizes smaller than stock. Anyone have opinions on this? [/QUOTE]