When should I replace my motorcycle's fork seals?

You should replace them immediately if you see any signs of leaking oil on the fork tubes or lowers. It's also best practice to replace them anytime you have the front end disassembled, as old rubber can become brittle and fail.

What are the signs of worn-out fork springs?

The most common signs are a "spongy" feeling in the front end, excessive nose-diving when you apply the front brake, or the suspension bottoming out easily over bumps.

Can I ride with a leaking fork seal?

While you can for a short time, it's not recommended. Leaking fork oil can get on your brakes, reducing stopping power. It also causes poor handling and can lead to permanent damage to the internal fork components if the oil level gets too low.

Motorcycle Fork Components

Sort by

Til Death Cycles 39mm Extended Damper Tube Kit- Harley-Davidson Front End
28 reviews $104.95

Lowbrow Customs 39mm Tapered Fork Lowers - Aluminum
1 review $334.04

Timken Neck Post Bearing & Race Set Made in USA
17 reviews $28.14

Til Death Cycles 49mm Harley-Davidson Front End Extended Damper Tube Kit
4 reviews $119.12

Lowbrow Customs 39mm Narrow Glide Fork Brace - Standard Width
3 reviews $149.96

Lowbrow Customs 39mm Tapered Fork Lowers - Black
$334.04

Lowbrow Customs 39mm Fork Shrouds - Black - 1987-Up - Harley-Davidson Sportsters
53 reviews $122.76

Lowbrow Customs 39mm Narrow Glide Fork Brace - For Lowbrow Narrow Trees
2 reviews $149.96

British Standard Triumph Neck Roller Bearing Conversion - modern bearings for your old Triumph motorcycle
34 reviews $73.90

British Standard Triumph Neck Bearing Conversion Kit | Fit Harley or Springer Front End to Triumph
34 reviews $72.00

Drag Specialties Neck Post Bearing and Race Set 1980-13 Harley-Davidson FLT/FLHT 99-13 FLTR/FLHR 60-86 FL/FX/FXWG 84-17 FXST/FLST 99-17 Dyna 82-21 XL
$30.11

Burly Brand Burly Lowboy Fork Lowering Kit - 39mm Sportster- See listing for Fitment
10 reviews $120.56 $133.95

Til Death Cycles 49mm Harley-Davidson Cartridge Eliminator Kit
2 reviews $178.28

Til Death Cycles 39mm Harley-Davidson Cartridge Eliminator Kit
4 reviews $169.10

The Speed Merchant 49 mm Fork Preload Adjuster - Gold Finish
1 review $161.96 $179.95

The Speed Merchant 39 mm Fork Preload Adjuster - Gold Finish
$152.96 $169.95

Cycle Standard Universal Fork Boot Gaiter Set for 41mm Front Forks
11 reviews $43.45

Cycle Standard 39mm Fork Boot Gaiter Set for Harley Sportster's Front Forks
32 reviews $43.71

Drag Specialties Upper Fork Slider Bushings - 39mm - 0.588" - Harley-Davidson OEM #45461-87
2 reviews $15.55

Drag Specialties Lower Fork Slider Bushings - 39mm - 0.778" - Harley-Davidson OEM #W4546587
1 review $15.55

British Standard Stainless Steel Fork Seal Holders 1968-1970 Triumph
2 reviews $153.77

Koyo Bearings Neck Post Bearing & Race Set Made in Japan
$21.95

V-Twin Manufacturing Tapered Neck Bearing Conversion Kit for 1952 - 1977 Harley-Davidson XL
7 reviews $76.57

The Speed Merchant 39 mm Fork Preload Adjuster - Black Anodized Finish
$152.96 $169.95

Cycle Standard Fork Boot Gaiter Set for 1954-1970 Harley-Davisdson Ironhead Sportster XL Models OEM #46001-54
4 reviews $35.37

EMGO Triumph Rubber Fork Gaiters 1963-68 T120 Bonneville TR6 Tiger OEM #97-1645
7 reviews $26.53

Cycle Standard Neck Post Bearing & Race Set Made in China
$15.99

Drag Specialties 41mm Lower Fork Slider Bushing 1984-2010 Harley-Davidson FXST/C 1993-2005 FXDWG 86-17 FLST 84-13 FLHT 11-13 FXS OEM# 45866-84
$15.55

Drag Specialties 35mm Lower Fork Slider Bushing 1984-1987 Harley-Davidson FX/FXE/FXR 84-87 XL OEM# 45416-84
$14.51

Drag Specialties 35mm Upper Fork Slider Bushing 1984-1987 Harley-Davidson FX/FXE/FXR 84-87 XL OEM# 45413-84
$14.51

Drag Specialties 49mm Upper Fork Slider Bushing 2006-2017 Harley-Davidson Dyna 16-22 XL1200X/XS 14-17 FXSB 14-16 Dresser OEM# 4651601
$17.63

Drag Specialties 49mm Lower Fork Slider Bushing 2006-2017 Harley-Davidson Dyna 16-22 XL1200X/XS 14-17 FXSB 14-16 Dresser OEM# 4608001
$15.55

Drag Specialties 41mm Upper Fork Slider Bushing 1984-2010 Harley-Davidson FXST/C 1993-2005 FXDWG 86-17 FLST 84-13 FLHT 11-13 FXS OEM# 45940-84
$15.55

Bare Knuckle Performance 49mm Mid Glide "The Clinch" Fork Brace - Gloss Black
$324.00

Bare Knuckle Performance 49mm Mid Glide "The Clinch" Fork Brace - Raw
$299.00

Bare Knuckle Performance 39mm Narrow Glide "The Clinch" Fork Brace - Gloss Black
1 review $299.00

Bare Knuckle Performance 39mm Narrow Glide "The Clinch" Fork Brace - Raw
$274.00

The Speed Merchant 39 mm Fork Preload Adjuster - Raw Machined Finish
$143.96 $159.95

Gigacycle Garage LeRoy Hooligan Tracker Complete Front End Kit 1982 & Up Harley-Davidson Sportster
1 review $1,895.00

Lowbrow Customs 39mm Fork Shrouds - Raw Steel - Harley-Davidson Sportsters
20 reviews $122.58

British Standard Stainless Steel Fork Seal Holders Triumph 1963 - 1967
8 reviews $150.03

Custom Motorcycle Forks & Components The front end is the face of your motorcycle, and a set of dialed-in chopper forks is key to a perfect custom build. Whether you're doing a full rebuild or upgrading with custom motorcycle fork parts, we...

Custom Motorcycle Forks & Components

The front end is the face of your motorcycle, and a set of dialed-in chopper forks is key to a perfect custom build. Whether you're doing a full rebuild or upgrading with custom motorcycle fork parts, we have everything you need to make your front end look great and perform flawlessly.

Choosing the Right Fork Parts for Your Build

Your front end is no place to cut corners. Here’s how to get it right:

Start with a Solid Rebuild: Before any custom work, start with the basics. A fresh set of fork seals and new oil is the most important step. Don't let a leaky seal ruin your hard work—rebuild it right the first time.
Get the Chopper Look: The classic chopper front forks style is all about length. We offer extended fork tubes to give your bike that iconic stance. Pair them with fork boots for a vintage touch and a clean finish.
Upgrade for a Better Ride: Worn-out fork springs lead to a mushy ride and dangerous front-end dive when braking. Upgrading to a new set of springs is one of the best performance improvements you can make for a more stable and controlled ride.
Dial in the Details: The small details make the build. Upgrading your sportster fork lowers or swapping to low-profile fork caps can clean up your front end and allow for a tighter fit with custom motorcycle handlebars.

Why Choose Lowbrow Customfor Fork Components?

We know that a solid front end is critical for both safety and style. We offer a comprehensive selection of motorcycle fork components, from OEM-quality rebuild kits for Harley-Davidson Sportster parts to full custom parts for your one-off chopper. We only stock road-tested parts that we’d trust on our own bikes.

When you choose Lowbrow Customs, you're not just buying parts; you're joining a community of builders. We're committed to backing you up with:

Free Shipping on all US orders over $99*
90-Day Hassle-Free Returns because we stand by what we sell.
Real-Deal Tech Support from our experienced team, ready to offer expert advice for your projects.

Read less

Motorcycle Fork Components FAQ

STAY CONNECTED
WITH LOWBROW

NO SPAM, EVER. JUST GREAT STUFF. YOUR INFO IS NEVER SHARED.