KOSO BIG BORE KIT 150CC - Honda Grom / Monkey 125 (2022+) with 5 Speed Transmission. Made from the best components available on the market, the 150cc Big Bore kit is the perfect …

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, …

The Stage 5 kit includes: *KOSO 150cc Big Bore Kit w/ Forged Piston *KOSO Performance Camshaft *KOSO Oversize Throttle Body *KOSO High-Flow Fuel Injector *KOSO Intake …

Address. 673 Rossiter St. St-Jean-sur-Richelieu, QC. Contact. Phone. Order line: 1-877-777-0604. Tech. Support: 1-450-359-0604

Hop up your Grom with this 150CC Big Bore Kit from Koso! This kit will boost the size of your motor by 17% and increase your compression ratio from 10:1 to 11.38:1 providing a noticeable …

Made from the best components available on the market, Koso's 150cc Big Bore kit is the perfect addition to upgrade your performance! The kit includes a black powder coated cylinder, 54 mm …

Koso 150cc Big Bore Kit - (NO Fuel Controller ) FITS: '22-'23+ Honda Grom RR ONLY '22-'23+ Honda Monkey(5speed) ONLY pn: MB640000 This complete kit comes with everything you …

The Koso 150CC Big Bore Kit increases the motor size of a Grom by 17%, stepping up the compression ratio to 11.38:1 from the standard 10:1. This upgrade delivers a marked …

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, …

Enhance your Grom's performance with the 150CC Big Bore Kit from Koso. This kit will increase your engine's displacement by 17% and raise the compression ratio to 11.38:1 from 10:1. This …