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

We Love Sportsters!  Other bikes can eat our dust!We Love Sportsters® - If you do, too, this is the place for you!

GOOD NEWS FOR SPORTSTER OWNERS! We have gathered up products for Sportsters, and put them all in one easy to use area of Steel Thunder Custom Cycles©. We realize how hard it is to find aftermarket products for Sportsters. Never fear, we are here! This area will expand with time, so keep checking back, and remember to refresh your browser. We may not be your best source for all Sportster parts, but we're working on it! Call us if you can't find it here.  We can get kick start conversions, belt guards, mounts, cam parts, etc.  Customize and beef up performance on your Sportster or Nightster!

Scroll down page for new products, photos of Sportsters, and other Sportster stuff. Bookmark This Page!


(Please also see the rest of our site for other Sportster parts & accessories.)

Air/Fuel for Sportster©

Engine Parts for Sportster®

Exhaust Pipes for Sportster

Fenders for Sportster®

Forward Controls for Sportster®

Frames for Sportster®

Gas Tanks for Sportster®

Primary Parts for Sportster®

Seats for Sportster®

Shocks for Sportster®

Baker Transmission Products for Sportster® (91-up XL)




WOW!  Easy Sportster Trike Conversion Kits!

Swingarm trike conversion for Sportsters.




Lots of frame choices, including 2004/L


Springer Front End for Sportster

XL Springers on Springer Front End Page



Kick Start Conversion Kit for 91/03 Sportster!

Retain electric start!

Kick start conversion kit for Sportster
Kick starter conversion kit for 1991-2003 XL Sportster

Kick starter conversion kit includes chrome sprocket cover, transmission mainshaft, chrome kick starter arm, rubber pedal, kick shaft.
Requires the replacment of the transmission mainshaft which is included in the kit. Conversion kit works with stock or aftermarket exhaust systems. Requires transmission mainshaft to be changed, forward controls, and relocation of master cylinder. Will not work with stock mid controls.
Part #V22-0218 - Kickstart conv. kit, fits: XL 1991-2003 5-Speed. SPECIAL ORDER, NO RETURNS* ... $310.73

Shipping policy:  Flat rate $12.95 entire order

*except for manufacturer defect.

**Note: Assembly should be carried out by an experienced mechanic or home hobby mechanic with patience.


Sportster Rigid Frame for 2004 and up Sportster XL

Sportster Rigid Frame for 2004/Later - Kraft Tech

1-1/4" diameter thick wall DOM steel tubing with 1-1/2" backbone.
TIG-MIG welded for strength.
Uses OE engine mounts.
Uses OE width tire and belt.

30 degree rake, 0 downtube stretch, 0 backbone stretch, 130/140 tire.

Made in the USA.




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

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

New Pages:

Skull Page

Brass Page

Indented side style EFI gas tank for late model sportsters.

Smooth EFI gas tank for late model Sportster.


EFI Tanks for Late Model XL!


Kraft Tech stock width rigid frame for Sportster XL

180/200 tire Sportster wide frame



Burly Slammer Suspension lowering drop kit for Big Twin, Dyna and Sportser motorcycles.


Go from stock to slammed in about an hour!
The Slammer is a complete lowering kit in one box.
No disassembly of forks required, they can stay on the bike while you work!
No special tools needed for installation.
The shocks included in the kit lower the rear up to 2 1/2" and the fork springs lower the front up to 2".

Highway Pegs for Sportster

Highway Pegs for Sportster


Sportster Ape Hanger installation made easy! 

Burly Brand Ape Hanger installation wire kit has everything you need to wire up your Sporty after installing apes.  Comes in 12", 14" and 16" kits.

On Handlebar Controls Page

burly brand made in the u.s.a.  wire harness kit for adding apehanger handlebars to your sportster xl

Springer Sportster.

This is Austin of Maryland's Springer Sportster. Nice! Click image to see larger.



Sportster Hand Controls for late model XL motorcycles.

Chrome hand control kits for late model (2004-2010) Sportster models.  Kits include brake master cylinder with lever, clutch perch with lever, switch housings and all necessary hardware.

On Handlebar Controls Page


Sportster wide tire conversion project - totally custom .

Click photo or here to see pictorial of this custom Sportster wide tire conversion project. Please Note: This is a hand-built custom, so please don't write asking about bolt-on parts, because they don't exist.

Larry's Modified Sportster

Click photo or here to see modified Sportster pictorial.

A trike love story ... follow link.

Click here to see the TRIKE that was made from this Sportster.

Michelle's Springer Sportster

Click on Photos to see larger.

Springer Sportster, built by one of our valued customers.

Sportster with springer front end.

There are more Sportster® products in out site, such as triple trees (including wide glide conversion kits) , high torque starter motors, Cam & Gear Sets , Windshields & Handlebar Controls. Check out the navigation bar at the left side of this page or our SITE MAP.


With our black springer front end (+2")

Vern's Chopper with our black 2 over springer front end.

To see more of this bike, click here.

Ricko sent us some photos and this message:

Hi, I'm Ricko from Jakarta, Indonesia. I did get some parts for my 03 Sporty from Steel Thunder Custom Cycles through an international shipping agent.

Below is the list that I had on my 03 Sporty:

1.Screaming Eagle 1200 cylinder
2.Screaming Eagle High Comp Piston
3.Screaming Eagle Ignition Module
4.Screaming Eagle Coil
5.Screaming Eagle Spark Plug Wire
6.Screaming Eagle Bolt In Cam
7.Porting and polish head by Monochrome Indonesia
8.Mikuni 42
9.Joker Machine Velocity Stack
10.Raddi Exhaust
11.Wide Glide Conversion Kit with 3* rake (Steel Thunder Custom Cycles)
12.Kraft/Tech Forward Control (Steel Thunder Custom Cycles)
13.Custom seat by Monochrome Indonesia
14.Stock sportster tank modified by Monochrome Indonesia
15.Braided line ( brake & throttle)
16.Mid USA Chrome Billet 5 ¾ Headlight
17.Joker machine Grip
18.Kuryakyn Levers
19.Arlen Ness Mirror
20.Drag Specialties 6” Riser
21.1 ” Drag bars
22.Chrome control and housing switch
23.Hog Pro Daytona 21x3.25 front
24.Hog Pro Daytona 18 x 5.5 rear
25.MT Tire 21x120 front
26.MT tire 18x200 rear
27.Big Boar Products 200 mm wide tire kit.
28.HD front and read tear drops floating break rotors
24.Chrome 4 piston front and rear caliper
25.Side mount plate and led tail light by Monochrome Indonesia
26.Front fender by Monochrome Indonesia
27.Front Spoiler by Monochrome Indonesia

Thanks, Ricko!

Good looking Sportster!

Ricko's hot sporty, customized with aftermarket parts bought from Steel Thunder Custom Cycles.

Click image or here to see larger

We do international orders through outside shippers.

Brian's Sportster Basket Case  renovation project.

This is Brian's Sportster Basket Case Project.

Nice renovation!

Yup, it's a Sportster!  Ain't she purty?

One FANTASTIC Sportster!

Seen at Cincy V-Twin Expo.

Check out our drag bike.

It's a Sportster!

And a WINNNER - 1st Place at Ozark Raceway Park!

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

PLEASE NOTE: We Do NOT Backorder. If your item is not in stock, you will be notified and given a refund.

15 Percent Coupon, summer promo, Beer Machine

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.


Please note that all prices are subject to change.


Steel Thunder Custom Cycles

531 Bungy Road

Columbia, NH 03576

Copyright 2002-2013 Steel Thunder Custom Cycles©


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