Kawasaki KX125 Combustion chambers Honda Suzuki RM85 Phathead cylinder head Chamber Selection:YZ65 5.2cc stock CX50 Yamaha YZ85 Phathead cylinder CR125R9304

Suzuki RM85 Phathead cylinder head kit 1991-2025+

Honda CR250 Phathead cylinder head kit 2005-2007

KTM150 TPI  Phathead cylinder head kit GasGas Husqvarna 150 Transfer port injection

KTM250SX KTM250XC 2007-2016 Phathead cylinder head kit

Purchase laser etch separately for customization - if you buy more than one gas cap or a set of caps and heads we etch them all for one etching fee

Kawasaki KX125 Combustion chambers Honda Suzuki RM85 Phathead cylinder head Chamber Selection:YZ65 5.2cc stock CX50 Yamaha YZ85 Phathead cylinder CR125R9304 Suzuki RM85 Phathead cylinder head kit 1991 2025+ Honda CR250 Phathead cylinder head kit 2005 2007