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 considering the Mo-Better porting and maybe the 265 to get it as close as possible to the YZ250 or 250SX powerbands.
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.
I'll probably buy a new cylinder and head for you to modify and keep my stock parts on hand. 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? (No trade secrets, please.)
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.
EDIT: I reposted this over in the Mods and Performance forum which is where I suppose this should have been.
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 considering the Mo-Better porting and maybe the 265 to get it as close as possible to the YZ250 or 250SX powerbands.
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.
I'll probably buy a new cylinder and head for you to modify and keep my stock parts on hand. 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? (No trade secrets, please.)
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.
EDIT: I reposted this over in the Mods and Performance forum which is where I suppose this should have been.
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