Piston Set, 2618, Dome, 3.858 Bore, 0.943 CD, 0.748 Pin, Set of 1.

Part Number 274760 (132897749)

UPC: 193564026118

Package contents: 1 Each per Box

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Description

As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged pistons for dirt bike and other off-road motorcycle engines. Engineered, forged and machined 100 percent in the USA, JE Pistons are designed for each specific engine and riding application to provide the ultimate combination of durability and performance. From the motocross track to the trail and everything in between, JE Pistons' performance is proven with every handful of throttle and wave of the checkered flag. Equip your bike with the best in forged pistons.

Fitment

This part fits the following vehicles.

Honda

2002-2008 CRF450R
2005-2009, 2012-2017 CRF450X

Features & benefits

Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applications
Race-inspired two-ring design promotes quick revving and throttle response for noticeable power
Designed specifically for Honda CRF 450R/450X Engines to provide optimized performance durability
Proprietary Forged Side Relief (FSR) forging design minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pin
Includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings
Made 100% in the USA
Accumulator Groove: A specialty groove between the top and second ring provides added volume for blow-by gases. This helps reduce pressure between the rings, improving top ring seal and minimizing ring flutter at high cylinder pressures.
Double Pin Oilers: Deliver twice the amount of oil to the wrist pin as compared to the standard single pin oiler.
Pin Fit: The pin bore is precision honed to attain an exact pin clearance. Clearances typically range from .0003 to .0010 between the wrist pin and pin bore.
Designed specifically for each engine and use application to provide optimized performance durability

Specifications

3D Undercrown Milling	No
Accumulator Groove	Yes
Anodize Top Ring Groove	No
Bore Diameter	98.00 mm
Combo 2	No
Compression Height	0.943
Compression Ratio	0.50347222222222
Compression Ratio Actual	12.50:1
Contact Reduction	No
Country Of Origin	USA
Cylinder Head	CRF 450
Double Pin Oilers	Yes
DVGP	No
Econo Undercrown Milling	No
EN Plating	No
Engine	Honda
Engine Displacement	450cc
Engine Stroke	2.445 in
Engine Type	ICE
Exhaust Angle	31.25
Exhaust Depth	.100
Exhaust Diameter	1.500
Forging Type	FSR
Gas Distribution	No
Intake Angle	11.5
Intake Depth	.110
Intake Diameter	1.625
Lateral Gas Ports	No
Mill Undercrown	No
Oil Groove Width	0.07950 in
Oil Ring Thickness	0.0795 in
Pin Fit	Yes
Piston Average Weight	285 gr
Piston Head Type	Dome
Piston Material	2618
Piston Series	JE Pistons
Piston To Wall Clearance	-0.002 in
Piston Volume	0.00 cc
Product Market	Off-Road
Product Type	Engine Piston Kit
Ring Set - Recommended	XS9800
Ring Set Included	Yes
Ring Set Part Number	XS9800
Skirt Coat	No
Smooth Crown Finish	No
Thermal Crown	No
Top Compression Ring Thickness	0.0480 in
Top Groove Width	0.04800 in
Tuff Skirt	No
Ultra Dome	No
Ultra Groove	No
Ultra Groove Plus Gas Port	No
Vertical Gas Ports	No
Wrist Pin Length	2.050 in
Wrist Pin Material	9310 Nickel Carbon Steel Alloy
Wrist Pin Outer Diameter	0.748 in
Wrist Pin Wall Thickness	0.160 in

Warranty

30 Months

About JE Pistons

JE pistons are all designed, forged, and machined in-house, allowing control over every step of the piston-making process. JE Pistons 7+ decades of experience in high-level racing has led to offering premium racing features, including full billet construction, EN plating, and purpose-designed coatings, to name a few.

California residents

WARNING: This product can expose you to chemicals including nickel, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.

Carb Status

California carb status to be completed