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40 mm Bore - Oversize Standard Piston Material 4032 Aluminum Alloy Bore - Oversize Standard Piston Diameter 66
Only available for the rear and has the same longitudinal scoop pattern as the well-known E-10
Drilling may be required in some applications
Straightener sections are clearly marked for fin size
Wiseco Racer Elite Series Piston Kit - RE812M07700 Yamaha YZ 250 / WR 250 2014-2017 Brand_Crossthread Cycle 40 mm Bore - OversizeFeatures R&D developed to provide dyno proven power gains Asymmetric skirt design for improved wear and even loading on major thrust skirt Precision fit ring; custom lapped compression ring for improved power 100% billet machined for superior strength to weight ratio and optimized fit High compression (14: 1 for 450cc, 14. 5: 1 for 250cc) for maximum torque and throttle response Dome design improves flame travel to maximize air fuel burn efficiency
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