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Offroad Series 1993-2025 Honda XR 650L Piston Kit

Part Number 139550 (132899029)
UPC: 193564026200
Package contents: 1 Each per Box
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MADE IN USA
$269.99 $283.99 SAVE 4% FREE SHIPPING
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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.

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.

Features & benefits

  • 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
  • Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applications
  • Designed specifically for each engine and use application to provide optimized performance durability
  • Includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings
  • Race-inspired two-ring design promotes quick revving and throttle response for noticeable power
  • Designed specifically for Honda XR 650L Engines to provide optimized performance durability
  • 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.
  • 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.

Specifications

2nd Groove Width 0.06 in
3D Undercrown Milling No
Accumulator Groove Yes
Anodize Top Ring Groove No
Bore Diameter 101.98 mm
Combo 2 No
Compression Height 1.234
Compression Ratio 0.42013888888889
Compression Ratio Actual 10.50:1
Connecting Rod Length STK IN
Contact Reduction No
Country Of Origin USA
Cylinder Head XR650L
Double Pin Oilers No
DVGP No
Econo Undercrown Milling No
EN Plating No
Engine Honda
Engine Displacement 650cc
Engine Stroke 2.146 in
Engine Type ICE
Exhaust Angle 22.5
Exhaust Depth .280
Exhaust Diameter 1.400
Forging Type Round
Gas Distribution No
Intake Angle 22.5
Intake Depth .280 in
Intake Diameter 1.625
Lateral Gas Ports No
Mill Undercrown No
Oil Groove Width 0.15900 in
Oil Ring Thickness 0.159 in
Pin Fit Yes
Piston Average Weight 406 gr
Piston Head Type Flat
Piston Material 2618
Piston Series JE Pistons
Piston To Wall Clearance -0.003 in
Piston Volume 0.00 cc
Product Market Off-Road
Product Type Engine Piston Kit
Ring Set - Recommended XH10200
Ring Set Included Yes
Ring Set Part Number XH10200
Second Compression Ring Thickness 0.0600 in
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 2.850 in
Wrist Pin Material 5115 Low Carbon Steel, Case Hardened
Wrist Pin Outer Diameter 0.945 in
Wrist Pin Wall Thickness 0.140 in

Warranty

30 Months

Magnuson-Moss Warranty Act

Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)).

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

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