Knobtown Cycle proudly offers the WOSSNER PISTON KIT HD M-8 107 CID 4.375 STROKE 3.937 BORE. Your Kansas City motorcycle parts experts for over 40 years.
Product Description
PISTON KIT HD M-8 107 CID 4.375 STROKE 3.937 BORE
- Crown is anodized to improve resistance to extreme heat
- Tested and proven to improve thermal diffusivity by up to 10%
- Hardcoat anodize treatment enhances the piston's abilities to manage heat and wear
- Ring groove wear is improved with anodize treatment ability to handle sliding wear as compared to non-treated surfaces
- Kit includes piston, piston rings, piston pin and retaining clips
- Valve Pocket Specifications:
- Intake Diameter: 1.780"
- Intake Depth: 0.200"
- Intake Angle: 27.000°
- Exhaust Diameter: 1.780"
- Exhaust Depth: 0.200"
- Exhaust Angle: 27.000°
Part Locations
| Location |
Available |
| Wisconsin (WI) |
1 |
| New York (NY) |
0 |
| Texas (TX) |
1 |
| Nevada (NV) |
2 |
| North Carolina (NC) |
1 |
| National Total |
5 |
Stock levels last updated: December 22, 2025 12:00 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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