This Koso accessory is designed to deliver reliable performance, modern styling, and practical functionality for your motorcycle.

*Fits 2022+ models Made from the best components available on the market, our 150cc Big Bore kit for Honda Grom® and Monkey® 2022+ is the perfect addition to upgrade your performance! The kit includes a black powder coated cylinder, 54 mm forged piston, rings, pin and gasket kit.

  • Premium Koso quality and finish
  • Designed for practical motorcycle use
  • Ideal upgrade for style, comfort, or functionality

Specifications

  • Cylinder displacement: 150 cc.
  • Cylinder material: Aluminum / Black powder coated.
  • Piston size: 54 mm.
  • Piston type: Forged.
  • Compression ratio: 11.38:1.
  • Kit includes: piston ring, piston, pin, gasket kit and cylinder.
  • fits Grom® & Monkey® 2022+.

Why Buy From Hurtle Gear?

  • 100% Genuine Parts
    We supply only authentic motorcycle parts and accessories from trusted, authorised brands.
  • Fast Dispatch from Western Australia
    In-stock items ship quickly from our WA warehouse for reliable Australian delivery.
  • Australian-Based Support
    Get help from real riders who understand the products we sell and the bikes they fit.
  • Trusted by Riders Australia-Wide
    We’ve received thousands of positive reviews across platforms including Google, SmartCustomer, TrustPilot, eBay, Facebook and more.
  • Over 13 Years in Business
    Hurtle Gear has been supporting Australian motorcyclists for more than 13 years.
SKU MB640000
Brand Koso
Product Specifications