✓ VERIFIED
Apr 30, 2026
Perfect for the track
Quality product.
MAXIMA
SKU: 78-9921
Maxima Racing 10W 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 10W fork fluid in a 5-gallon container is specifically formulated for V-twin motorcycle suspension systems. This mineral-based racing fluid reduces friction and stiction while maintaining consistent damping performance and protecting fork internals from corrosion and wear.
Why riders pick this
- Mineral-based racing 10W fork fluid
- Reduces friction and prevents stiction
- Shear-stable, high viscosity index
- Minimizes foaming and air entrainment
- Conditions seals and eliminates corrosion
- 5-gallon bulk size for shops and multiple bikes
When dialing in your V-twin's suspension for more aggressive riding or heavier loads, Maxima Racing 10W fork fluid provides the stable damping characteristics you need. Its robust mineral-based formula is engineered to prevent fade and maintain consistent fork action, giving you better feedback and control. This bulk container is perfect for busy shops or for riders who perform regular, thorough suspension maintenance.
Stable Damping, Enhanced Protection
- Mineral-based racing fork fluid for V-twin applications
- Reduces friction and prevents stiction for smoother fork action
- Shear-stable, high viscosity index formula maintains consistency
- Minimizes foaming and air entrainment for predictable damping
- Conditions seals and eliminates corrosion for long component life
- 5-gallon bulk size for shops or frequent service needs
Performance for Your V-Twin
Optimizing your fork fluid is a fundamental step in achieving peak suspension performance on your Harley-Davidson or Indian Motorcycle. Maxima Racing 10W fork fluid helps ensure that your front end can handle demanding conditions, providing both comfort and control. This large container is a practical choice for keeping your V-twin fleet or personal bike collection performing at its best.
Specifications
- Brand: Maxima
- Manufacturer Part #: 59505-10
- UPC: 851211006271
- Viscosity: 10w
- Container Size: 5 gallons
- Weight: 40.9344 lbs
- Dimensions (L x W x H): 12 in x 12 in x 15 in
Common questions
How much fork fluid does my V-twin motorcycle typically require?
Most V-twin fork tubes typically hold between 5-10 ounces of fluid per leg. A 5-gallon container will service many bikes or keep a shop well-stocked for multiple maintenance cycles.
Can I mix Maxima Racing 10W fork fluid with other brands or weights?
No, it is strongly recommended to completely flush the fork system and refill with fresh fluid of the same brand and weight. Mixing fluids can lead to performance degradation and unpredictable damping.
Is this fork fluid suitable for both Harley-Davidson and Indian Motorcycle models?
Yes, Maxima Racing 10W fork fluid is designed for V-twin motorcycles, including Harley-Davidson and Indian Motorcycle models. Always confirm the correct viscosity for your specific bike in your owner's manual.
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 | 78-9921 |
| WEIGHT | 40.94 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★
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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.
