JE Pistons Honda CRF450R PRO Piston Kit

JE "Pro Series" pistons kits are available for demanding 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 kit provides the performance needed by top engine builders such as Pro Circuit and JGRMX, with the durability required by weekend riders. This specific kit, MPN 284669, is for the Honda CRF450R with a +3mm bore, resulting in 478cc displacement and a 12.5:1 compression ratio.