Maxima Primary Oil - V-Twin Wet Primary & Diaphragm Clutch
About Maxima
Maxima Racing Oils has blended lubricants in California since 1979 and supplies factory race teams across powersports. Its V-twin oils are formulated for the shared-sump and air-cooled realities of American engines.
Keep your V-twin's primary drive running smoothly with Maxima Primary Oil, a mineral-based gear oil specifically formulated for wet primary chain cases and diaphragm spring clutches. This oil is engineered to reduce chain and gear wear while ensuring consistent, positive clutch engagement for Harley-Davidson and Indian Motorcycle engines.
Why riders pick this
- Mineral-based V-twin gear oil
- Formulated for wet primary chain cases and diaphragm spring clutches
- Shear-stable to minimize chain and gear wear
- Reduces clutch slippage for smooth, positive shifts
- Extends primary chain life
Maxima Primary Oil provides critical lubrication and protection for the heart of your V-twin's power delivery. Its shear-stable formula works to minimize wear on the primary chain and gears, extending the life of these vital components. Riders will appreciate the noticeable reduction in clutch slippage and the assurance of smooth, positive shifts, making every ride more enjoyable and controlled.
Optimized Primary Drive Performance
- Mineral-based V-twin gear oil for reliable protection
- Formulated for wet primary chain cases and diaphragm spring clutches
- Shear-stable to minimize primary chain and gear wear
- Reduces clutch slippage and ensures smooth, positive shifts
- Extends primary chain life by reducing stretch and wear
Essential for Harley & Indian Primary Drives
For Harley-Davidson models 1984 and newer with wet diaphragm spring clutches, as well as other compatible Indian V-twin motorcycles, this Maxima Primary Oil is an indispensable part of your maintenance routine. It's designed to handle the specific demands of these primary systems, providing the lubrication needed for optimal performance and preventing premature wear. Always consult your owner's manual for specific fluid requirements and change intervals.
Specifications
- Brand: Maxima
- Manufacturer Part #: 40-04901
- UPC: 851211003300
- Size: 32 oz
- Weight: 2.01 lbs
Common questions
What type of clutches is this primary oil designed for?
This Maxima Primary Oil is specifically formulated for wet primary chain cases and diaphragm spring clutches found in Harley-Davidson and Indian Motorcycle engines.
Will this oil work in my Harley-Davidson primary case?
Yes, it is formulated for all 1984 and newer Harley-Davidson models with wet diaphragm spring clutches, and is also suitable for compatible Indian V-twin motorcycles.
Does this oil help with clutch slippage?
Yes, its formulation is designed to reduce clutch slippage and ensure smooth, positive shifts, contributing to better power transfer.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Maxima |
| TYPE | Chemicals |
| SKU | 78-99924 |
| WEIGHT | 2.01 lb |
