✓ VERIFIED
Dec 27, 2022
Works as advertised long life without breaking down is important in fork oil
MAXIMA
SKU: 78-99927
Maxima Fork Oil - 20wt 32oz
$14.99
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Maxima 20wt fork oil is a mineral-based hydraulic fluid engineered for Harley-Davidson and Indian V-twin fork systems. Fortified with Lubricinol to reduce friction and stiction while maintaining film strength under load and damping cycles.
Features
- Mineral-based formula
- Lubricinol-fortified to reduce friction and stiction
- Shear stable with high viscosity index
- Minimizes foaming and air entrainment
- Conditions seals and prevents corrosion
- Tested in H-D fork systems
Specifications
- Brand: Maxima
- Manufacturer Part #: 50-03901
- UPC: 851211003393
- Viscosity: 20wt
- Size: 32 oz
- Weight: 2.01 lbs
- Dimensions: 2.65 in L x 5.75 in W x 9.15 in H
Fitment
Fits V-twin motorcycles including Harley-Davidson and Indian models that use fork systems requiring 20wt mineral fork oil.
Frequently Asked Questions
What viscosity is this fork oil?
20wt — a common weight for V-twin fork systems. Check your owner's manual or fork spec before ordering.
Is this genuine Maxima?
Yes — this is Maxima 20wt fork oil distributed by Western Power Sports, trusted by Harley and Indian riders.
How often should I change my fork oil?
Fork oil service intervals vary by model and riding conditions. Refer to your motorcycle's service manual for recommended intervals.
Will this work in my Harley or Indian fork?
This is formulated for V-twin motorcycles and tested in Harley fork systems. Verify the 20wt specification matches your bike's fork manual.
| BRAND | Maxima |
| TYPE | Chemicals |
| SKU | 78-99927 |
| WEIGHT | 2.01 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.89
35 RATINGS
5★
32
4★
2
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1
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0
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✓ VERIFIED
Jun 9, 2021
Great fork oil! This exact fork oil comes with Legends Aexo front end kits. If it’s good enough for Legends then it’s good enough for me! Thanks JPC!
✓ VERIFIED
Jul 18, 2019
less than 1/4 the cost of HD
✓ VERIFIED
Feb 17, 2017
Seems to be a good quality oil at a good price. If you need help on how to change your fork oil check out my video explaining how I do it with Maxima oil- https://www.youtube.com/watch?v=1u7w-Rb0HS4
✓ VERIFIED
Jun 1, 2025
Dogger sent me.
Great stuff<br />Fork oil worked perfectly
✓ VERIFIED
May 30, 2025
FORK OIL AND DRAIN SCREWS
REPLACED OLD OIL WITH THE NEW MAXIMA 20W FORK OIL, HAVE GREAT RESULTS ON THE RIDE. THE NEW DRAIN SCREWS WERE EASY TO INSTALL BEING ALLEN HEAD COMPAIRED TO PHILLIPS HEAD SCREWS.
