Product Description
Primary Case Oil is available now from Knobtown Cycle, your Kansas City motorcycle parts specialists.
Key Features
- Same fluid as our famous MTL gear oil
- This product is for use in the primary chaincase with wet-diaphragm spring clutches.
- Improves clutch operation while reducing wear and temperature
- For 1984-to-present V-Twin American motorcycle engines, including Evolution, Twin Cam, and aftermarket engines of similar design
- Where most synthetics are too slippery for clutch operation, this friction-balanced product is balanced to provide less slip, smoother operation, and helps to apply more power in modified engines
Product Specifications
- Part Number: 57-6522
- Brand: Red Line
- Weight: 2.01 lbs
- UPC: 083522429047
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) |
25 |
| Elizabethtown (PA) |
0 |
| Boise (ID) |
25 |
| Midway (GA) |
25 |
| Fresno (CA) |
0 |
| Jessup (MD) |
0 |
| Midlothian (VA) |
25 |
| National Total |
100 |
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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