Raptor 700

Raptor 660

YFZ 450 R/X

YFZ 450



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Geisick Big Bore Cylinders

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.

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  • 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 Cylinders

Raptor 700
Raptor 660 105mm
YFZ, YFZR and YZ 98mm
YFZ, YFZR and YZ 100mm

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