Vertex Standard compression piston kit, comes with Vertex top end gaskets and cam chain. Other graded sizes and higher compression pistons are available , email for requirements. Fits HONDA CRF450R CRF450RX 2021-2025 models with 96mm bore , graded size B 95.97 .The clearance is to allow for piston expansion when it heats up. Vertex Four-stroke Pistons When it comes to power and performance, Vertex four-stroke pistons are hard to beat. Forged from the highest quality 2618 aluminum alloy, Vertex pistons are perfectly suited to handle the rigors and high pressures of today's modern four-stroke engines. Plus, to aid in the break-in process and reduce wear, every Vertex piston utilizes a unique Molybdenum Disulphide (MOS2) coating on the piston skirt. But, what truly sets Vertex apart from the competition are the unique piston profiles and compression ratios that are offered in A, B, C and D sizes. This variation in sizing, a mere 0.01mm, allows the piston to be perfectly sized to the cylinder for maximizing power and performance while reducing blow-by and oil consumption. We recommend when fitting a new piston kit to a used cylinder that you have the bore honed. This honing method leaves a functional cross hatched effect on the cylinder to help retain oil in the bore which aids the piston and bore life.
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