✓ VERIFIED
Apr 30, 2026
Perfect for the track
Quality product.
MAXIMA
SKU: 78-9916
Maxima Racing 5W Fork Fluid 5-Gallon - Harley & Indian V-Twin
$299.99
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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 fork oil engineered for V-twin motorcycles. This formula delivers consistent damping performance and reduces friction under high-performance riding conditions. The convenient 5-gallon bulk size is ideal for shops, fleets, or riders who service multiple bikes regularly.
Why riders pick this
- Mineral-based racing formula for V-twin forks
- Shear-stable, high viscosity index
- Reduces friction and prevents stiction
- Minimizes foaming and air entrainment
- Conditions seals and prevents corrosion
- 5-gallon bulk size for shops and multiple bikes
Keeping your front end dialed in is critical for control, especially when you're pushing your V-twin hard. Maxima Racing Fork Fluid 5W ensures your forks respond predictably, absorbing bumps and maintaining tire contact. Its shear-stable formula means consistent damping from the first mile to the last, reducing rider fatigue and enhancing confidence.
Consistent Damping, Reduced Friction
- Mineral-based racing formula for reliable performance
- Shear-stable, high viscosity index maintains consistency
- Reduces friction and prevents stiction for smoother travel
- Minimizes foaming and air entrainment for predictable damping
- Conditions seals and prevents corrosion for extended fork life
- Convenient 5-gallon bulk size for shops and frequent service
Optimized for V-Twin Front Ends
Whether you're hitting the canyons or just want a more refined ride, upgrading your fork fluid makes a noticeable difference. Maxima Racing Fork Fluid 5W is designed for the specific demands of Harley-Davidson and Indian Motorcycle front ends, ensuring that your suspension works as intended. This bulk container makes it easy to keep your bikes serviced or to stock your shop efficiently.
Specifications
- Brand: Maxima
- Manufacturer Part #: 59505-5
- UPC: 85121100621
- Viscosity: 5W
- Size: 5 gallons
- Type: Mineral-based racing fork fluid
- Weight: 40 lbs
- Dimensions: 12.4 in L x 12.6 in W x 15.6 in H
Common questions
What motorcycles is this fork fluid designed for?
Maxima 5W racing fork fluid is specifically engineered for V-twin motorcycles, including Harley-Davidson and Indian Motorcycle models, to provide optimal suspension performance.
How often should I service my motorcycle's fork oil?
Fork oil should typically be serviced every 10,000–15,000 miles or annually, whichever comes first, to maintain peak suspension performance. Always refer to your owner's manual.
Why is a 5-gallon container beneficial for riders?
A 5-gallon bulk container is ideal for riders who service multiple bikes, own a shop, or prefer to have a ready supply for regular maintenance, ensuring consistent fluid availability.
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 | 78-9916 |
| WEIGHT | 40.0 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.
