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Koso 4 Valve Cylinder Head Honda Grom / Monkey 2014-2020

Original price was: $378.00.Current price is: $97.99.

SKU: P389262 Categories: Engine, Motorcycle Parts

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Koso 4 Valve Cylinder Head Honda Grom / Monkey

Complete the finishing touches of Koso’s Big Bore Kit with this 4 Valve Cylinder Head. The unique four-valve design increases air flow and performance, providing your mini bike with more power and torque.

Features:

4 Valve head
Increased airflow and performance
Stainless steel 24mm intake valves
Stainless steel 20mm exhaust valves

Specifications:

Cylinder height: 64.2mm
Upper gasket thickness: 0.25mm
Bottom gasket thickness: 0.5mm
Volume: 169.21cc
Squish: 1mm
Cylinder head titration: 13.4cc
Compression ratio: 12.3:1
Valve/tappet clearance: IN: 0.10mm EX: 0.17mm

Note: Requires use of iridium spark plugs. This is an aftermarket part built for racing purposes only. Koso is not responsible for any damages caused to the parts, vehicle or to yourself and others. Engine parts are not under warranty nor is collateral damage or cost of labor in cases of malfunction.