JE Pistons
Fitment:
-09-12 Honda CRF450R
Bore Size: 99mm (+3mm Big Bore). Aftermarket Big Bore Cylinder or Big Bore Cylinder Sleeve is recommended. OEM Cylinders bored to 99mm have awfully thin cylinder walls.
Pro Series Pistons feature lightweight boxed forging. Forgings also feature additional bracing. Pistons are machined to have ultra flat ring groove (which improves ring stability, reduces ring flutter, and improves ring seal capability). Pistons also feature low friction skirt design.
Replacement Components are available, please see below.
Includes:
-JE Forged Piston
-JE Piston Ring Pack
-JE Wrist Pin
-1 Set of JE Piston Pin Clips
Piston Specs:
99mm 12.5:1 Pistons (284669):
-Bore Diameter: 99.00mm
-Piston Head Type: Dome
-Piston Dome Volume: -4.6cc's
-Cylinder Head: CRF 450
-Compression Height: 0.815"
-Piston Pin Outside Diameter: 0.748"
-Piston Pin Length: 2.050"
-Piston Pin Material: 9310 Steel
-Ringset Included: Yes
-Top Compression Ring Thickness: 0.0383"
-Oil Ring Thickness: 0.0795"
-Piston Material: 2618 Aluminum Forged
-Forging Type: FSR
-Piston Avg Weight: 264 g
-Pin Wall Thickness: 0.160"
12.5:1 Piston will work well with 91+ Octane Pump Gas. Pistons are a 2-Ring Piston Design (Same as Stock Piston). Piston is designed with large Valve Pocket Diameters to have enough radial clearance for +2mm Valves. If using with High Performance Camshafts, Piston to Valve Clearance must still be checked to insure adequate valve pocket depth.
Replacement Components:
Replacement Ring Pack:
-ZV9900
Replacement Wrist Pin:
-748-2050-16-93C
Replacement Wrist Pin Clips:
-748-050-MW
