JE Pistons
Fitment:
-04-09 Honda CRF250R
Bore Size: 78mm (Stock Bore)
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
Pro Series Pistons Feature an Internally and Externally Braced Windowed Boxed Forging for improved strength and allowing lightweight piston construction. Also features Ultra Flat Ring Grooves for improved ring stability and ring seal. Pistons also feature Moly Skirt Coating.
Piston Specs:
78mm 13.2:1 Pistons (247607):
-Bore Diameter: 78.00mm
-Piston Head Type: Dome
-Cylinder Head: CRF250 04-08
-Compression Height: 0.748"
-Piston Pin Outside Diameter: 0.630"
-Piston Pin Length: 1.650"
-Piston Pin Material: 9310 Steel
-Ringset Included: Yes
-Top Compression Ring Thickness: 0.0341"
-Oil Ring Thickness: 0.0585"
-Piston Material: 2618 Aluminum Forged
-Forging Type: FSR
-Piston Avg Weight: 150 g
-Pin Wall Thickness: 0.120"
78mm 13.7:1 Pistons (274178):
-Bore Diameter: 78.00mm
-Piston Head Type: Dome
-Piston Dome Volume: -1.3cc's
-Cylinder Head: CRF250 04-08
-Compression Height: 0.748"
-Piston Pin Outside Diameter: 0.630"
-Piston Pin Length: 1.650"
-Piston Pin Material: 9310 Steel
-Ringset Included: Yes
-Top Compression Ring Thickness: 0.0341"
-Oil Ring Thickness: 0.0585"
-Piston Material: 2618 Aluminum Forged
-Forging Type: FSR
-Piston Avg Weight: 150 g
-Pin Wall Thickness: 0.120"
110+ Octane Race Fuel is Recommended (required for 13.7:1 Piston) for Both the Above Pistons. Minimum 100 Octane for 13.2:1 Piston, 110+ Octane Minimum required for 13.7:1 Piston.
Replacement Components:
Replacement Ring Pack:
-JG7001-3071 (Fits All Pistons)
Replacement Wrist Pin:
-630-1650-12-93C (Fits All Pistons)
Replacement Wrist Pin Clips:
-630-050-MW (Fits All Pistons)
