This JE "Pro Series" piston kit is specially designed for demanding high performance applications and feature purpose-built forging designs that reduce overall piston weight without sacrificing strength or durability. The addition of internal and external strut braces significantly reduces stress on critical areas and improves ring groove flatness for improved ring seal during operation. JE Pro Series kits provide the performance needed by top engine builders such as Pro Circuit and JGRMX, with the durability required by weekend riders.
Internal and External bracing
Ultra-Flat ring grooves
Low Friction Skirt
Ultra light weight
Hand de-burred - Requires no de-burring or preparation
2618-T6 Forging
FSR Design
Pin, locks and JE Pro Seal piston rings included
SpecificationValue
Displacement
477cc
Bore Size
99mm
Oversize
+3mm
Compression Ratio
12.5:1
Piston Weight
289 grams
Skirt Style
FSR
Piston Ring Part Number
JG5001-3898
Wrist Pin Part Number
748-2050-16-93C
Piston Circlip Part Number
748-050-MW
Brand
JE Pistons
UPC
193564028839
Fitment information
Honda Models
Honda CRF450R 2002 - 2008
Honda CRF450X 2005 - 2017
Honda TRX450ER Electric Start 2006 - 2014
Honda TRX450R Kick Start 2006 - 2009
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