I HAVE A CR250R CYLINDER OFF A TRX250R. THE CURRENT BORE IS AT 71.9MM. THIS CAME IN A PARTS LOT A N D WAS N OT TESTED. IT WAS PORTED BY R&R RACING. PLEASE SEE PICTURES FOR CONDITION. DON'T FORGET TO CHECK OUT MY OTHER ITEMS FOR SOME MORE GREAT TRX250R PARTS. The item "#12 1986 TRX250R TRX 250R ATC ATC250R R&R PORT CYLINDER HEAD 1987 1989 1988 71MM" is in sale since Saturday, March 13, 2021. This item is in the category "eBay Motors\Parts & Accessories\ATV, Side-by-Side & UTV Parts & Accessories\Other". The seller is "the_r_shop" and is located in Ortonville, Michigan. This item can be shipped to United…