Product Description
4 Valve Cylinder Head is available now from Knobtown Cycle, your Kansas City motorcycle parts specialists.
The Koso 4V Head Kit is the ideal engine part to complete the Koso Honda Grom® Big Bore kit. Because of its unique 4 valve design, the air flow and performance are increased. This new designed head is the perfect addition for those who desire more power and torque.
Key Features
- Not legal for use in California on pollution controlled vehicles, race use only in California – waiver available.
- Requires the use of Iridium spark plug
- The 4 Valve Head Kit features a forged piston, stainless steel 24 mm intake valves and 20 mm exhaust valves. Only fits Koso 170cc big bore kit.
Product Specifications
- Part Number: 27-5822
- Brand: Koso
- Weight: 6 lbs
Available at Knobtown Cycle
Shop online or visit our Kansas City showroom. Fast shipping available on all orders! Free Ship to Store!
Part Locations
| Location |
Available |
| Ashley (IN) |
0 |
| Elizabethtown (PA) |
0 |
| Boise (ID) |
1 |
| Midway (GA) |
4 |
| Fresno (CA) |
0 |
| Jessup (MD) |
0 |
| Midlothian (VA) |
1 |
| National Total |
6 |
Stock levels last updated: March 1, 2026 5:07 PM
Professional Installation Available
Knobtown Cycle offers professional installation services. Contact us via a service request to learn more.
Thank you for Shopping at Knobtown Cycle!
When you shop with us, you’re not just buying motorcycle parts — you’re supporting a small, family-run business rooted right here in the heartland of America. Every order helps us keep riders on the road and fuels our passion for serving the motorcycle community.
From all of us at Knobtown Cycle, thank you for choosing local and riding with us.
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