Description
Red Line V-Twin Primary Oil is engineered for smooth clutch engagement and dependable protection in primary chain cases. Based on the proven MTL gear oil formulation, it balances friction to reduce slip while improving power transfer and lowering operating temperatures. Ideal for 1984-to-present Harley-Davidson® engines and compatible aftermarket builds, it supports consistent performance in wet clutch systems and is also suitable for select older British motorcycles.
Features:
- For 1984-to-present V-Twin American motorcycle engines, including M8, Evolution, Twin Cam and aftermarket engines of similar design
- Same fluid as our famous MTL gear oil
- Improves clutch operation while reducing wear and temperature
- 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
- This product is for use in the primary chain case with wet clutches
- Suitable for primary case in older British bikes






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