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xr250r Cylinder out of service limits

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2004 XR250R.

Cylinders measuring 73.43mm. Service limit is 73.11.

Can i just chuck on new larger rings or is this going to get a lot more expensive than i would like?

If i do replace the rings, do i have to score the cylinder?

Trouble is i dont have a compression guage to see if she's down so i dont even know if its a problem.

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Just get a 77 mm JE piston and have the cylinder bored to fit.

$190 plus the cost of boring ($40ish) and misc materials (oil, gaskets, snapped bolt).

Sorry I can't answer the original questions more fully.

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At 73.43, I would say the bore is worn too far to just replace the rings, there is probably wear on the piston as well. You may as well do as jimbeaux says and go for the 77mm piston. Check the cam chain, it is a high wear item. A valve job is also a good idea since you already have the engine down.

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What made you get into the top end?? Was there a noise issue?? If so, you should think about measuring the small end on the crankshaft connecting rod just to be sure it's in spec.

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