How can I know my fork springs wear out?

You can tell if you front springs are worn out by how much resistance they give you when you hit the front brake or when you hit a bump. If you notice your front end is diving in the corners and you feel the bike bottom out when you hit a bump, it is possible that your front fork springs are worn out. Another sign is if you notice your motorcycle is not sitting evenly, or your motorcycle tires are not wearing evenly. These are also signs your fork springs may be worn out.

How do I know if your steering / neck bearings are loose?

The best way to check your front steering bearings is to get the front of the motorcycle off the ground. You don’t want any weight on the front of the motorcycle. Next move your motorcycle handlebars from side to side. Everything should feel smooth and consistent. If you feel any hesitation or vibration coming through the bars, your bearings might be damaged. Also pay attention for any spots where the front end hesitates when you turn the bars side, to side; this could be a notch in the bearing race from wear. In this case you should replace your neck bearings and races. Another way you should check to see if the bearings are loose is by grabbing the forks and trying to move them side, forward and back. If you feel them wiggle and there is play at the steering head, tighten your bearings to spec and then test them again to see if they operate smoothly. If they don’t, it is probably time to change your bearings. You can also gauge the tightness of the bearings by, with the front of the motorcycle off the ground, aligning the wheel straight forward and seeing how easily it 'flops' to the side. It shouldn't slam to the side, it should be a nice even movement.

When should fork seals be replaced?

Fork seals should be replaced if you notice that they are cracked, or if you notice that they are leaking. When fork seals are leaking it could be some fluid on the fork tubes, or if they are really bad it could be actively running down the lower legs. You need fluid in your front forks for them to operate properly. The fluid is there to allow some control of the compression and rebound of the forks. It is also there to keep everything cool while the forks are in motion. If you loose too much fluid, you can seriously damage your forks, or cause handling and stability issues.

Can I ride with a leaking fork seal?

Yes, you can ride for a period of time with a leaking fork seal, but you should fix it as soon as possible. You need the fork oil to keep your forks from sustaining damage during use, and to ensure the motorcycle handles as it should. If one fork leg is losing fluid, and the other isn't, it can cause an imbalance that can lead to stability issues. Safety first!

Harley-Davidson Motorcycle Fork Components

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Lowbrow Customs 39mm Narrow Triple Trees Kit
$399.99

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

V-Twin Manufacturing Chrome Fork Neck Cup Kit with Fork Stops for Harley-Davidson Big Twins
9 reviews $78.22

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

Cycle Standard Smooth Stainless Steel Hidden / Internal Fork Stop Kit 1949-1987 Harley-Davidson Big Twins
$106.07

V-Twin Manufacturing Chrome Fork Neck Cup Kit for Harley-Davidson Big Twins
10 reviews $78.37

Lowbrow Customs 39mm Tapered Fork Lowers - Aluminum
$334.04

Mullins Chain Drive 35mm Super Narrow Tree Set
3 reviews $500.00

The Speed Merchant 39mm Speed Triple Trees - Black - 1991-05 Harley-Davidson FXD 1988-20 XL 1988-00 FXR
$836.96 $929.95

Lowbrow Customs 39mm Narrow Glide Fork Brace - For Lowbrow Narrow Trees
$145.59

Cycle Standard Grooved Stainless Steel Hidden / Internal Fork Stop Kit 1949-1987 Harley-Davidson Big Twins
$106.07

Lowbrow Customs 39mm Tapered Fork Lowers - Black
$334.04

V-Twin Manufacturing Chrome Neck Cup Hidden / Internal Fork Stop Kit 1957-1981 Harley-Davidson Sportsters
1 review $88.14

V-Twin Manufacturing Ironhead Sportster Neck Cup Conversion 7/8 inch to 1 inch
5 reviews $120.43

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

Lowbrow Customs 39mm Fork Shrouds - Raw Steel - Harley-Davidson Sportsters
18 reviews $119.01

Lowbrow Customs 39mm Narrow Glide Fork Brace - Standard Width
$145.59

Cycle Standard Universal Fork Boot Gaiter Set for 41mm Front Forks
10 reviews $41.38

Cycle Standard Hidden / Internal Fork Stop Kit Harley-Davidson Big Twins
$77.54 $103.38

Cycle Standard 39mm Fork Boot Gaiter Set for Harley Sportster's Front Forks
28 reviews $41.63

Pro One Performance Products Hidden / Internal Fork Stop Kit 1989-1999 Harley-Davidson Softail
$104.45

Burly Brand Slammer Suspension Kit - 2006- 2017 Harley-Davidson Dyna FXD - Black
$387.86 $430.95

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

Cycle Standard Fork Neck Cup Dust Shield Set for Harley-Davidson Big Twins OEM #43865-48A
16 reviews $8.46

Progressive Suspension Heavy-Duty Fork Springs 1999-2005 Harley-Davidson FXD FXDC FXDL 2004-15 XL Models
2 reviews $139.95

Cycle Standard Fork Neck Cup Set 1948 -1986 Harley-Davidson Big Twin OEM #48311-60
4 reviews $43.29

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

Lowbrow Customs 39mm Fork Shrouds - Black - 1987-Up - Harley-Davidson Sportsters
51 reviews $119.18

Til Death Cycles 49mm Harley-Davidson Cartridge Eliminator Kit
1 review $178.28

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

Progressive Suspension Drop-In Front Fork Lowering Kit - fits 2000-2017 Harley-Davidson FXST FLST
$164.95

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

Progressive Suspension 49MM Heavy-Duty Fork Spring Kit 2006-2017 Harley-Davidson FXD/B/C/L FXDWG 2008-2017 FXDF 2008-2011 FXCW/C
$139.95

Progressive Suspension Heavy-Duty Fork Springs 1999-2005 Harley-Davidson FXDWG
$139.95

Progressive Suspension Heavy-Duty Fork Springs 2006-17 Harley-Davidson FX Models
$139.95

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

Progressive Suspension Replacement Fork Springs 1988-03 Harley-Davidson XL Models
$123.95

Progressive Suspension Replacement Fork Springs 1992-03 Harley-Davidson XL Hugger 883C/1200C
1 review $123.95

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

Cycle Standard Fork Boot Gaiter Set for 1954 - 1970 Harley-Davisdson Ironhead Sportster XL Models OEM #46001-54
4 reviews $33.69

Cycle Standard Replacement Lower 39mm Damper Springs 1987-Up Harley-Davidson XL 1991-2005 FXD 1987-1994 FXR OEM# 45374-87
$15.61

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

V-Twin Manufacturing Replacement Lower 39mm Damper Springs 1987-Up Harley-Davidson XL 1991-2005 FXD 1987-1994 FXR
$14.82 $19.76

Colony #3265-1 Upper Bearing Dust Shield 1949-Up Harley-Davidson Big Twin 4-Speed Pre-2017 Softail Pre-2005 Dyna/FXR to 2005 1980-2013 Touring 1982-2003 Sportster - Zinc Plated
5 reviews $7.26

Cycle Standard Fork Neck Cup Dust Shield - Top - for Harley-Davidson Big Twins OEM #48361-80
11 reviews $8.20

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

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 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 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 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

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

Colony #3415-1 Steering Head Cup Set 1930-1957 Harley-Davidson 1930-1934 C Singles - CAD Plated
$38.50

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
$299.00

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

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

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

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

Progressive Suspension Monotube Fork Cartridge Kit - Standard - 2007 Harley-Davidson XL50 04-10 XL883C 04-09 XL1200R 06-07 XL883R
$316.95

Progressive Suspension Replacement Fork Springs 2004-15 Harley-Davidson XL Models
$123.95

Progressive Suspension Replacement Fork Springs 2016-20 Harley-Davidson XL Models
$123.95

Progressive Suspension Replacement Fork Springs 1999-05 Harley-Davidson FXD FXDL FXDC
1 review $123.95

Mullins Chain Drive 41mm Super Narrow Tree Set
1 review $500.00

Progressive Suspension Drop-In Front Fork Lowering Kit - fits 1988-2015 Harley-Davidson Sportster XL Models
$164.95

Burly Brand Slammer Suspension Kit - 2006 - 2017 Harley-Davidson Dyna FXD - Chrome
$387.86 $430.95

Burly Brand Slammer Suspension Kit - 2004 - 2015 Harley-Davidson Sportster XL - Black
$387.86 $430.95

Burly Brand Slammer Suspension Kit - 2004 - 2020 Harley-Davidson Sportster XL - Chrome
$387.86 $430.95

Burly Brand Slammer Suspension Kit - 1988 - 2003 Harley-Davidson Sportster XL - Chrome
2 reviews $387.86 $430.95

Gigacycle Garage LeRoy Hooligan Tracker Complete Front End Kit 1982 & Up Harley-Davidson Sportster
1 review $1,714.29

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

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