THIS SALE IS FOR A NEW SET OF PREMIUM QUALITY CYCLE PRO BRAND PISTON RINGS. 1.00 MM = .040" OVER SIZED 68.00 MM. STOCK BORE IS 67.00 MM. MADE IN JAPAN. FIT : YAMAHA YTM 200 TRI-MOTO , YFM 200 MOTO-4 , BW 200 BIG WHEEL 200 , XT 200 DIRT BIKE. FIT OEM YAMAHA PISTONS + AFTERMARKET CAST PISTONS.(((((DO NOT FIT FORGED HI PERFORMANCE PISTONS LIKE WISECO AND JE))))). CHECK OUT MY STORE AND AUCTIONS FOR MANY MORE ATV PARTS AND ACCESSORIES.  PT# CP23099  BIN# PR204