KOSO Honda Grom/Monkey 61mm 4V Replacement Piston Kit Honda OEM It uses a special Polyurethane

It uses a special Polyurethane Compound that is designed to eliminate that dust and debris that comes off of worn/used belts

this has several different adjustable points

with noiseless profile and two self-lubricating lamellar cast iron piston rings at rectangular sections

Having a stiff spring ensures reduced clutch slipping

KOSO Honda Grom/Monkey 61mm 4V Replacement Piston Kit Honda OEM It uses a special PolyurethaneKOSO's 4V Piston Kit for the Honda Grom Monkey is a complete piston to be installed in a cylinder kit that fits 4V Cylinder Heads. This is a forged piston that measures 61mm and includes a piston, pin, pin clips, and a set of rings. These are completely forged pistons and is highly prefered over cast pistons. The reason is cast pistons are made up of brittle content, over the much more stout forged piston. Although forged pistons are heavier, it makes