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CYBER MONAY SALES WEEK 5% Off All Items. ENDS 12/2/23! → Discounts will be applied automatically when you check out.
CYBER MONAY SALES WEEK 5% Off All Items. ENDS 12/2/23!


YZ85 YZ 85 YZ-85 OE Big Bore Kit 52.50mm OEM Cylinder 105cc Top End Rebuild Kit

Save $132.51 Save $132.51
Original price $749.99
Original price $749.99 - Original price $749.99
Original price $749.99
Current price $617.48
$617.48 - $617.48
Current price $617.48

Unleash Beast Mode Power with a 105cc Big Bore Kit

  • Yamaha OEM Nikasil coated 52.50mm cylinder by Millennium Technologies for superior heat dissipation and wear resistance
  • Forged Wiseco piston designed for hardcore strength and reliability or Wossner Forged Piston Made in Germany
  • Complete top end rebuild kit for a fresh max horsepower build

This 52.50mm big bore kit pumps your YZ85 up to a potent 105cc for absolutely epic power gains. The premium Nikasil coated cylinder has unmatched heat transfer and durability properties to withstand aggressive use. It's paired with a forged Wiseco piston engineered for the demands of high-RPM race engines. The kit includes everything needed for a complete top end rebuild including piston, rings, clips, pins, gaskets, and stud kit. Transform your 85 into a holeshot-grabbing monster!

Built for the hardcore racer who wants the strongest, most durable power gains possible. The 105cc engine churns out tractor-pulling torque and high-RPM ripping power to rail berms and blast by competitors.

BPRATV - The Best Parts. The Best Performance. The Best Price.


2100781061499530-10114-00RE915M0525093450-16115-00, 93210-84724-00, 93210-56459-00 5PA-11631-00-A0, 4ES-11631-01-A0