As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of Pro Series pistons for powersports engines. Engineered, forged and machined 100% in the USA, JE Pro Series ATV pistons are designed for each specific engine and racing application with input from professional-level teams and racers. From motocross to dirt track and everything in between, JE Pistons’ Pro Series are the ultimate forged piston choice for ATV competition.

• 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 each engine and use application 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

Piston Series    
Pro Series

Cylinder Head    
YFZ 450

Bore Diameter    
95.00 MM

Compression Ratio Actual    
13.50:1

Piston Head Type    
Dome

Piston Volume    
23.56 CC

Piston Material    
2618

Forging Type    
FSR

Piston Average Weight    
267 GR

Ring Set Included    
Yes

Top Compression Ring Thickness    
0.0480 IN

Second Compression Ring Thickness    
0.0600 IN

Oil Ring Thickness    
0.0795 IN

Wrist Pin Outer Diameter    
0.787 IN

Wrist Pin Length    
2.050 IN

Wrist Pin Wall Thickness    
0.160 IN

Product Type    
Engine Piston Kit

Product Market    
ATV