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Advice on Topend

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I just purchaced a 97 rm250, the whole bike needs to be gone through but the motor is top of the list. It needs topend rebuild, just wasnt sure if i should spend the money on a new sleeve and piston kit through LA or just have a local machine shop bore it out. I think the exhaust valves might have been damaged also. Just not sure what im getting into.

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X2. DO NOT sleeve cylinders, replate them. If the cylinder is already sleeved, then get it rebored, or replace the cylinder with a proper one

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X2. DO NOT sleeve cylinders, replate them. If the cylinder is already sleeved, then get it rebored, or replace the cylinder with a proper one

why dont? there's certain applications where it wont matter that much, the miniscule ammount of  heat added will only effect youi if you run alot of really tight muddy enduro races.

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