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Ships within 48 hours · Estimated delivery Aug 13 - Aug 18
New OE heads modified to 144cc available along with the piston and gasket kits
new Yamaha studs
squish clearance
Cylinder porting by Eric Gorr
YZ125 BIG BORE CYLINDERS Size:124cc New OE heads modified toPORTED AFTERMARKET CYLINDERS for 2005 21 YZ125,134,144 $350 $550 USPS PRIORITY MAIL INCLUDED! These aftermarket cylinders are designed by Eric Gorr for better reliability over original cylinders. Special design consideration was given to the exhaust bridge area on the small bores and porting on the big bores. Longevity is all about casting design and tooling. These cylinders don't have stress risers around the exhaust port like a OE Yami cylinder so
