ENGINE 273 CYLINDERS AND CYLINDER KITS •Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders •Three kit options to choose from: Standard Bore, Standard Bore High Compression and Big Bore •Cylinder kits include matched Vertex pistons to ensure longevity, performance and reduced engine noise •Nickel Silicon Carbide plated for long life •Kits come complete with gaskets, cylinder, piston, rings, pin and clips •Big bore cylinders do not require machine work •Made in the U.S.A. COMPRESSION BORE SUG. DLR. SALE FITS MODEL DESCRIPTION RATIO (MM) PART # RETAIL COST PRICE KAWASAKI KX450F 09-12 Big Bore gasket kit - - 0934-4056 N/A $58.50 $36.10 KTM 250 EXC-F 14 Standard Bore gasket kit - - 0934-3130 N/A 83.82 36.10 YAMAHA YZ450F 18-19, WR450F 19-20 +2mm Big Bore gasket kit - - 0934-6345 N/A 63.02 27.40 +2 mm Big Bore, 468cc kit 12.7:1 99 0931-0851 N/A 480.31 431.30 YZ450FX 19-20 +2mm Big Bore gasket kit - - 0934-6345 N/A 63.02 27.40 +2 mm Big Bore, 468cc kit 12.7:1 99 0931-0851 N/A 480.31 431.30 CYLINDER REBUILD KITS •The foremost compatible top-end rebuild kit all in one box •Features a Moly2000 centrifugally-spun, cast cylinder sleeved iron bore to provide better ring seal for better compression, more torque and more horsepower •2-stroke kit comes complete with wear-resistant Moly2000 centrifugally-spun, cast cylinder sleeve, matching pro-forged or pro-cast piston kit, wrist pin bearing and complete top-end gasket set •4-stroke kit comes with everything in the 2-stroke kit plus valve stem seals SUG. DLR. SALE FITS MODEL PART # RETAIL COST PRICE KAWASAKI KX250F 09-16 0931-0519 N/A $243.80 $79.30 COMPRESSION CYLINDER PISTON DISPL PISTON TOP END SUG. DLR. SALE FITS MODEL RATIO BORE (MM) DIAMETER (MM) VERSION KIT PART # RETAIL COST PRICE HONDA CR80R 90-91 STD 47.00 46.95 80 Cast Replica 0910-3359 N/A $78.00 $48.10 CRF250R 10-13 14.1:1 76.80 76.76 250 Forged High Comp 0910-3775 N/A 205.30 154.40 14.1:1 76.80 76.77 250 Forged High Comp 0910-3776 N/A 205.30 126.70 CRF450R 13-16 13.2:1 96.00 95.96 450 Forged High Comp 0910-3806 N/A 231.00 109.40 TOP END PISTON KITS •All pistons are heat-treated with a T-5 hardening and tempering cycle •All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life •Cast piston kits are gravity-cast aluminum alloy (not forged) with 18% silicone content, which produces an extremely light but very strong piston •Forged pistons are forged from 2618 aluminum for superior strength and durability •Forged High Compression pistons improve power and torque across entire rpm range •Forged Replica pistons are forged OEM replacements •Replica pistons and all rings are OEM replacements •Top end piston kit includes piston, rings, pins, circlips, top end gaskets, wrist pin bearing when applicable and cam chain when applicable PISTON VERSIONS Cast Replica – Cast OE replacement piston Forged Replica – Forged OE stock compression piston Forged High Comp – Forged high compression pistons
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