Engine

Maximize the 110 power range. Enhances mid-and top-end power with easy install. No core required. Use in stock motor or in addition to the 130 kit.

Easy bolt-on power. This is the largest bore kit available that does not require boring your engine cases for additional cylinder sleeve clearance. New aluminum cylinder with steel sleeve, lightweight piston kit and gaskets are included in this complete...

A great combination of power, reliability and easy  installation makes this kit our best seller.  Cylinder retains mounts for easy skid plate installation.  Excellent power gains throughout the RPM range.BBR aluminum cylinder52mm flat-top piston, rings,...

Note: this does not come with the mechanical water pump seal

AVAILABLE IN STANDARD BORE AND BIG BORE SIZES4-STROKE KITS INCLUDE A NICKEL CARBIDE COATED CYLINDER DESIGNED WITH WIDER WATER JACKETS, COMPLETE PISTON KIT AND A TOP END GASKET SETCYLINDER KITS INCLUDE ALL PARTS IN THE KITS PLUS AN ALUMINUM CYLINDER HEAD...

Athena Cylinder Kit Bb 94Mm 12.3:1 Ac/Kaw/Suz P400510100002

Athena Cylinder Kit Bb 53Mm 13.8:1 Yam P400485100038

Athena Cylinder Kit Bb 100Mm Kaw P400250100015

Athena Cylinder Kit Bb 100Mm 12.5:1 Hon P400210100030

Athena Cylinder Kit Bb 100Mm 12.1:1 Suz P400510100028

Athena Cylinder Head Dome 58Mm Yam S410485308010

Feature Koyo and Nachi precision Japanese crank bearingsThe crankshaft seals feature a carbon/fluorocarbon pad on the seal lip and stainless steel garter springsReduces startup friction enhancing dry start performance and reducing crank pin wear