Steel Thunder Custom Cycles motorcycle parts

 

Shopping Pages:

Control Section:

Brakes, discs, rotors, dashes & instrument panels, gauge brackets, footpegs, forward controls, grips, throttle control, handlebar controls, handlebars, levers, linkage, levers, mirrors, risers, shift & jockey control.

Drivetrain Section:

Belt drives, belt drive covers, clutch kits, chain drives, drivetrain packages, kick start transmission, offset sprockets, points, derby & ignition coves, primary belts, primary chains, primary covers, pulley & brake combo kit, rear drive belts, Sportster performance parts, six speed conversion, rear sprockets, rotors, transmissions & parts.

Electrical Section:

Battery related, battery tenders, charging systems,coils & mounts, dash/instrument panels, speedos, tachs, terminal kits, electronic ignitions, handlebar switches, headlights, horns, lighted license plate mounts, lighting, starter motors, taillights, turn signals, wiring harnesses.

Engine Section:

Motorcycle engine parts, drivetrain packages, cams & cam side parts, big bore kits, big bore piston kits, Sportster engine parts, motor mounts, drivetrain section, engine mounts.

Exhaust Section:

Exhaust pipes listed by model, exhaust accessories, insulating wrap, mufflers, extensions, high heat spray, heat shields, clamps and mounts.

Frame/Body Section:

Frames listed by style, engine mounts, fenders, struts, floorboards, foot rests, pegs, frame covers, hardtails, highway bars, kickstands, lowering kits, seats listed by model, shocks, sissy bars & pads, swingarms.. Also, Rolling Chassis Kits.

Front End Section:

Complete front fork assemblies, fairings & fairing accessories, fork brackets/triple trees, fork tubes, sliders, fork legs, boots, springer front ends & parts, wide glide kits.

Fuel Section (Gas, Oil, Air):

Air cleaners & covers, breathers, carburetors & rebuild kits, fuel injection control, gas tanks, gas caps, gas tank cleaner/prep systems, oil, oil coolers, oil line kits, oil pressure & tank gauges, oil pumps, oil tanks, , velocity stacks.

Saddlebag & Windshield Section:

Saddlebags listed by manufacturer, windshields

Wheel Section

Tires,  tire size chart, 40, 60 & 80 spoke wheels, solid wheels.

General Merchandise Section:

Catalogs, covers, gift certificates, gift suggestions, goggles & eyewear, hardware, luggage racks, motors, motorcycle covers, security, locks & alarms, tools, trailer accessories, ramps, wheel chocks, trailer hitches to put on motorcycle.

Other Pages:

Fun, Photos & Links Section:

Photos of our customer's motorcycles, including bike kit builds, trike build link, free biker ecards, jokes, banner links, text links, link to us, webmaster's awards.

Tech & Info Section

Tech tips, tire size chart, engine break-in, suspension & shocks info, rake and trail calculator, contact page, frequently asked questions (FAQ), our credentails, terms & conditions of sale, disclaimer, international shipping policy.

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Sitemap and Search Home Page Contact Us Sportster Section Catalogs

Front Forks / Front Ends / Fork Kits

FREE SHIPPING!

Complete Front Fork Assemblies
for your American V-Twin Custom or Harley Davidson Motorcycle
 

NEW!

Neck cup conversion kit for Sportster fits K modesl and XL 1952-1981.  Now early sportsters can cange front ends to springers and more!

Fits K Model & Sportster 1952/1981

NECK CUP CONVERSION KIT FOR SPORTSTER - OLD STF

Use this conversion kit when installing a Big Twin or late Sportster 1" neck fork assembly on your early Sportster.
Allows easy installation of our Hardbody® springers as well.
Simply remove your existing cups and install these steel cups into your frame neck and you are ready for Big Twin forks!
Includes Timken® bearings and races.

Part #: 36652 - Old-STF - Raw Steel Neck Cup Conversion Kit.
Fits K Model & Sportster 1952/1981 ... $122.85

NOW AVAILABLE WITH RAKED TREES!

Big-Un Front Fork Kit

Big-Un front forks, available in single or dual disc styles.  Standard 31 inch length.

 

Single or Dual Disc

 

 

 

Collett & Spanner Nut

Collett & Spanner Nut

 

Internal For Stop With Bearing Race

Internal For Stop With Bearing Race

 

Hidden Axle Mount

Hidden Axle Mount

BIG-UN CHROME PLATED COMPLETE FRONT FORK KITS FOR CUSTOM USE - Single or Dual Disc - Hardbody by Sun Myth

If you're building a ground up custom or updating your existing fork assembly, this is the front end you've been looking for. With fat tube covers and totally smooth trees, custom is what this assembly is all about. Using a collett type locking system to clamp the fork tubes in the trees, no fasteners are visible, enhancing the smooth look. The axle caps on the lower legs are bullet shaped and cover the ends of the axle to hide them from sight. Fender tabs are removable if you choose to run without a fender for a chopper look. The caliper mounting brackets are removable for your choice of single or dual disc. With this high quality assembly, you'll have that high dollar inverted fork look without the high dollar inverted fork price.

  • Available with raked trees
  • Uses a collett type locking system to clamp the fork tubes in the trees leaving no visible fastener
  • Bullet shaped caps on the lower legs cover the ends of the axle
  • Removable fender tabs
  • Removable caliper mounting brackets
  • Hard chrome 41mm fork slider tubes for years of dependable service
  • Top mount internal fork stop/bearing race
  • Inverted fork look
  • Billet aluminum construction (except fork tubes, axle and steering stem)
  • Standard length is 31" from top bearing to axle (same as FXST)
  • Hidden hardware throughout
  • Available in 0 degree raked trees (same as FLH 4 speed), 3 degree raked trees (same as FXWG and Softail) and 5 degree raked trees
  • Includes spanner wrench
  • Requires fork oil (11.2 oz per leg, shipped dry)
  • Use with 1984/1999 11 1/2" brake disc and caliper(s)
  • Use with 1984/1999 Wide Glide wheel hub or equivalent
  • Oversized front forks include installed cover plate on right lower leg for a seamless look.
  • 2 brake caliper mounting brackets are included for single or dual disc applications

Big-Un Front Fork Assembly fits Big Twin 1949/Later (except FLT models), Sportster 1982/Later and most custom frames. Includes spanner wrench. Requires fork oil.

Standard Rake BIG-UN Front Fork Kit, No Rake
PART # LENGTH DISC STYLE PRICE BUY NOW
M36746 Standard 31" Single $1533.15
M36743 Standard 31" Dual $1543.50

BIG-UN Front Fork with Raked Trees for single or dual disc
PART # LENGTH TREE RAKE PRICE BUY NOW
M39955 +2 oversize 3 degrees $1304.70

M39961

+2 oversize 5 degrees $1305.70
M39956  +4 oversize 3 degrees $1304.70
M39962  +4 oversize  5 degrees $1305.70
M39957 +6 oversize 3 degrees $1304.70 
M39963  +6 oversize  5 degrees $1305.70
M39958  +8 oversize 3 degrees $1314.69
M39964  +8 oversize  5 degrees  $1315.68
M39959  +10 oversize 3 degrees $1340.66
M39965  +10 oversize  5 degrees $1341.66
M39960  +12 oversize 3 degrees $1366.64
M39966 +12 oversize  5 degrees $1367.63

Note: Cover plate can be used on right or left side.

41mm Complete Front Fork Kit for Big Twin.  Choice of Smooth or Ball Milled Legs.

Smooth Legs shown.

Smooth Legs

Lower Bearing Cup with built in fork stop.

Optional Fork Cup

CHROME PLATED 41MM COMPLETE FRONT FORK KITS FOR BIG TWIN - Hardbody

Lower legs are machined from billet aluminum and feature screw on dust covers, flush mount axle with hidden hardware and removable brake and fender mounts
The 41mm fork tubes measure 24 1/4" long, are hard chrome plated and are the stock length for the models listed
Front end measures 31" from the top stem bearing to the centerline of the axle
Custom axle spacers are required, use 57333 axle spacer that is 6" long and cut to length
The dual removable brake mounts are designed for 1984/1999 OE or similar brake calipers and 11 1/2" brake discs
See Front End Section for Deuce style fender mounts and 2000/Later style brake caliper mounts
Fork kits are shipped without fork oil. Add 11.2 ounces of fork oil per leg of the weight of your choice. (See our all-in-one oil here.)

Fits Big Twin 4 speed 1949/1986*, Softail 1984/1988*, FXDWG 1993/1999 and Custom applications.
* When used with our MU36671 lower fork bearing cup with built in fork stop (description below).

Smooth Leg Fork Kit - Part#: M39930 ... $827.44
Kit must be assembled by a qualified mechanic.

Optional fork cup: This fork cup has a built in fork stop that cleans up frame neck area for that sanitary custom look. To prevent the cup from twisting in the frame a 3/16" I.D. hole is provided in the fork cup so the frame neck can be drilled by the technician. A 3/16" O.D. staking pin is also included. This chrome plated steel cup is designed to be used with Big Twin frames with removable fork cups. Fits with OEM style FXR or Dyna style lower fork bracket. Also fits custom lower fork brackets with upright fork stop nubs. (Please note our $35 minimum purchase. Purchase with Front Fork, or take advantage of our Flat Rate Shipping for $12.95 per order and get everything you need now.)
#M36671 ... $21.75

FOR SPRINGER FRONT END ASSEMBLIES & ACCESSORIES CLICK HERE.

FOR FORK TUBES & SLIDERS, FORK LEGS, INTERNALS, CLICK HERE.

FOR FRONT FORK BRACKETS/TRIPLE TREES & WIDE GLIDE CONVERSION KITS CLICK HERE.

Fork oil - See our all-in-one oil here.

Don't see what you need?  Contact us.  Chances are we have it.  We have thousands of parts that are not shown online.

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FLAT RATE SHIPPING APPLIES IN CONTINTENTAL 48 UNITED STATES ONLY. AK, HI and APO/FPO will have additional shipping fees. We ship within the U.S.A. and to APO/FPO (military addresses; weight and size restrictions apply.). We do not accept foreign credit cards. Please see our CONTACT page for more information.

Prefer to call in your order to Steel Thunder? Call 603-237-8200.

FREQUENTLY ASKED QUESTIONS

Please note that all prices are subject to change.

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Steel Thunder Custom Cycles

531 Bungy Road

Columbia, NH 03576

Copyright 2002-2013 Steel Thunder Custom Cycles©

 

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