BBR

10 years in the making, this long-awaited kit rocks. Comes complete with custom “big finned” BBR aluminum cylinder, piston, rings, piston pin, clips, BBR exclusive motocross grind performance...

10 years in the making, this long-awaited kit rocks. Comes complete with custom “big finned” BBR aluminum cylinder, piston, rings, piston pin, clips, BBR exclusive motocross grind performance...

For those who want arm-jerking power, this kit is for you. The ultimate combination of horsepower and performance. No case boring required.All new designBrand new high quality BBR aluminum...

BBR 132Cc Big Bore Ring Set 411-Hcf-1112

BBR 143Cc Big Bore Cylinder 411-Klx-1417

The largest displacement bore kit available without the need to bore engine cases. Comes complete with aluminum cylinder, mx grind camshaft, piston, rings, piston pin, clips, and gaskets.

BBR 175Cc Big Bore Gasket Kit 411-Hcf-1502

BBR 175Cc Big Bore Rings 411-Hcf-1507

Comes complete with all the necessary parts including manifold adaptor, throttle and cable, and extra jets for tuningComplements high performance cams and bore kits

The best “sleeper” upgrade for your 110. Allows the stock 3-speed transmission to be converted into a race ready 4-speed OEM quality. Forged steel.

BBR 8" Handlebar 510-Hxr-5107

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...