Raptor 700

Raptor 660

YFZ 450 R/X

YFZ 450



Garage Sale



Geisick Big Bore Cylinder Kits

Geisick Performance now offers Big Bore cylinders with unrivaled strength and reliability. By using precision machining and high strength steel sleeves we can turn a stock cylinder into the most ridged cylinder possible. This allows for larger bores that can withstand the abuse of high power race engines and large stroker cranks. These kits include a cylinder, piston, and top end gasket kit.

For Cylinders only Click Here



  • Complete cylinder kit ready to bolt on with Big Bore Cylinder, CP Pistons, and Cometic Gasket Kit
  • Utilizes a steel sleeve for maximum strength
  • Better ring seal which creates more power
  • Last longer and is more reliable (no coatings to flake off)
  • Sleeve is custom made to be stronger, which is
    required in high powered applications
  • Retains stock appearance

Big Bore Cylinder Kit Options

Cylinder with Piston and Gaskets Kits
Raptor 700 - 105.5mm (11:1 to 13:1 CP Pistons)
Raptor 660 - 105mm (12:1 CP Piston) $679
YFZ, YFZR/X 450 - 98mm (12.5 or 13.75:1 CP Piston)
YFZ & YFZR/X 450 - 100mm (14:1 CP Piston)

Core cylinder is required, or a $250 core charge will be applied.