What Bore Is Your 250r On?

[Rustytinhorn]

Trying to get a feel of where our 250r's sit as far as getting worn out.

[deathman53]

mine are big bore clyinders, that is why they are 72mm. My stock cylinders are 30 and 40 over.

[Billy Golightly]

68.50mm using the YZ250 piston on the flat tracker.

[vegas250rr]

stock bore!

[Jason Hall]

I have one .010. (my favorite 250R engine ever). another .040 another .060 & one pro-x big bore 72.25mm.