BORE KIT 124cc

#00364 

$140.00

54mm piston, 11:1 compression

Better overall horsepower with this kit. 

INCLUDES: Piston, pin, rings, circlips, headgasket, basegasket.

NOTE: Piston is designed to work with our bore/stroke combo (see below), and sits down in cylinder at top-dead-center. This is not a defect, and compression ratio is still 11:1 with this setup.

REQUIRES: Boring, rejetting.

BORE/STROKE COMBO

130cc

#00364-16026 

$400.00

INCLUDES: Piston, pin, rings, circlips, headgasket, basegasket. Stroke work on your stock crank.

REQUIRES: Boring, rejetting. Send in your crank for modification.  Download our Stroker Booklet for details. 

CAMSHAFT -

MIDRANGE GRIND

ON YOUR CORE:

OUTRIGHT (includes core charge) #12753-22747G  $275.00 

HARDWELD CAM

Designed specifically to work with big bore engines.  Smooth torque at low rpm and awesome mid to top end power when used with our bore kit. Uses stock valve springs.

We recommend the Yamaha GYT-R jet kit #GYT-5B698-00 for use with our products. In testing, we found the stock carb rejetted with these components performed better than any aftermarket carb setup.