Same-day shipping cutoff: Noon Pacific Time

Spring time is in full swing here at ProCycle.  With these busy days please be sure to let us know if your order is time sensitive.  We try to do as much as we can to accommodate your upcoming trip.  

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Category
Model
Year

Big Bore Kit - 440cc, Athena

WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
DRZ400 '00 - '25 DRZ400S '00 - '25 DRZ400E '00 - '25 DRZ400SM '05 - '25
  • Includes aluminum cylinder, piston kit, and special gasket set designed for larger water jackets
  • Bolts on with no machining required
  • 94mm big bore piston
  • Aluminum cylinder designed with wider water jackets for better cooling.
  • Forged hi-compression piston  12.8:1
  • Includes all necessary Rings, Clips, and Gaskets.
Ships in 3-5 business days
$937.95

Big Bore Kit - 434cc, Cylinder Works

WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
DRZ400 '00 - '03 DRZ400S '01 - '25 DRZ400SM '05 - '25 DRZ400E '00 - '07
  • Direct bolt-on, ready-to-install cylinder; requires no replating and looks virtually identical to the OEM
  • Nickel Silicon Carbide plated for long life
  • Honed to exact size for easy piston installation
  • Big bore cylinders do not require any machine work
  • Come complete with gaskets, cylinder, 94mm piston, rings, pin and clips
Ships in 3-5 business days
$700.95

Big Bore Kit - Stroker 462cc

WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
DRZ400 '00 - '03 DRZ400S '00 - '25 DRZ400SM '05 - '25 DRZ400E '00 - '07

All in one package.

  • Hot Rods complete +4mm stroker crank assembly
  • 94mm big bore cylinder and piston kit
  • Complete gasket set with seals
  • Includes new crank bearings

We suggest adding a set of HotCams camshafts and a new clutch kit for the best results.

Ships in 3-5 business days
$1,099.00