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Honda MX & Off-Road Dirt Bikes
Eric: Mo Better/265 '03 CR250 Questions
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[QUOTE="skipn8r, post: 975787, member: 52414"] Guys, I have an '03 CR250 that is in excellent, stock condition. I've added a Doma pipe, VF3 cage and 38 mm PWK. I bought the bike knowing that it is a bit soft down low and up top compared to a YZ250 or a 250SX. I would just buy a YZ250, but I know and understand Honda suspension, etc., and would rather stick with Honda. I'm getting close to buying the Mo-Better porting and probably the 265 to get it as close as possible to the YZ250 or 250SX powerbands. I'll probably buy a new cylinder and head for you to modify and keep my stock parts on hand. For reference, I'm 160 lbs, I ride mostly desert, off-road and some MX track at 5,000 ft elevation. All of it is recreational riding. I'm coming off a 250 4-stroke and I really like the 2-stroke snap, but I'd prefer less of a sudden hit and a more broad power band. I'd also prefer to be able to run on 91 octane pump gas. Questions: 1) Will any other year CR250 cylinder/head bolt up to an '03? 2) If so, which year is preferable as a starting point? 3) If I buy new parts, should I just buy a cylinder and exhaust valve assembly, or a specific cylinder and separate exhaust valves? 4) Can you characterize how much "better" the 265 with Mo-Better is compared to stock displacement with Mo-Better? 5) Does the 265 setup have more to do with an improved exhaust valve configuration and seal than it does a displacement increase? (Not looking for trade secrets, just perspective.) 6) Does anyone know why KTM can get an awesome, broad power curve with a case-reed 250 while the current case-reed Honda seems to produce such a narrow powerband? 7) Anything else I need to consider? Thanks. PS: I originally posted this over in the 2-stroke forum. I suppose it ought to be here. [/QUOTE]
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Honda MX & Off-Road Dirt Bikes
Eric: Mo Better/265 '03 CR250 Questions
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