✓ VERIFIED
Apr 30, 2026
Perfect for the track
Quality product.
MAXIMA
SKU: 78-9925
Maxima Racing 5W Fork Fluid 1-Liter - Harley & Indian V-Twin
$17.99
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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.
Maxima Racing Fork Fluid 5W is a mineral-based racing fluid engineered for V-twin motorcycle front forks, delivering consistent damping performance and extended seal life. Formulated with a high viscosity index to maintain film strength under extreme conditions while reducing friction and stiction.
Why riders pick this
- Mineral-based racing 5W fork fluid
- Shear-stable, high viscosity index
- Reduces friction and prevents stiction
- Minimizes foaming and air entrainment
- Eliminates corrosion and conditions seals
- 1-liter bottle for single-bike service
Your V-twin's front end is critical for control and comfort. Maxima Racing Fork Fluid 5W is designed to optimize that performance, providing smooth, predictable damping that responds to every road input. This advanced mineral-based formula helps to eliminate stiction, ensuring your forks move freely and maintain consistent contact with the road, enhancing both safety and ride quality.
Precision Damping for V-Twins
- Mineral-based racing formula for V-twin front forks
- Shear-stable, high viscosity index maintains film strength
- Reduces friction and prevents stiction for smoother action
- Minimizes foaming and air entrainment for consistent damping
- Eliminates corrosion and conditions seals for extended life
- Convenient 1-liter (34 oz) bottle for single-bike service
Upgrade Your Ride Quality
Even a small change in fork fluid can make a big difference in how your Harley-Davidson or Indian Motorcycle handles. Maxima Racing Fork Fluid 5W is an easy way to upgrade your suspension, providing the consistent performance needed for everything from daily commutes to spirited canyon carving. This 1-liter bottle is perfect for a single fork service, ensuring you have just the right amount for your project.
Specifications
- Brand: Maxima
- Manufacturer Part #: 59901-5
- UPC: 851211006202
- Viscosity: 5W
- Volume: 1 liter
- Weight: 2.07 lbs
- Dimensions: 2.65 in L × 5.7 in W × 9.15 in H
Common questions
What viscosity should I use in my V-twin motorcycle forks?
5W is a common viscosity for many V-twin forks. However, it's crucial to check your owner's manual or fork manufacturer's specifications for the correct weight for your specific bike and riding conditions.
Is Maxima Racing Fork Fluid compatible with Harley-Davidson and Indian Motorcycle models?
Yes, Maxima Racing Fork Fluid is designed to work in all V-twin motorcycles, including Harley-Davidson and Indian Motorcycle models, providing enhanced suspension performance.
Will this fork fluid improve my motorcycle's handling?
By delivering consistent damping performance, reducing friction, and minimizing foaming, this fluid can significantly improve your motorcycle's handling, providing a more predictable and controlled front end feel.
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 | 78-9925 |
| WEIGHT | 2.07 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.88
8 RATINGS
5★
7
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✓ VERIFIED
Nov 6, 2025
Fork Oil
Great product for the price, that works as it should.
✓ VERIFIED
Mar 14, 2025
Fork oil
Fork oil. It goes in the forks. Easy to use.
✓ VERIFIED
May 16, 2022
A good quality fluid and I like the convenience of the container.
✓ VERIFIED
May 4, 2019
Just the right amount of fluid to fill both forks.
✓ VERIFIED
Mar 5, 2015
Put in my KYB fork
Bled my damper with this stuff, and it worked just as it should.
