Steel Thunder Custom Cycles - aftermarket motorcycle parts for Harley-Davidson and American custom bikes.
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Steel Thunder Custom Cycles

152 York Drive

Marshfield, MO 65706

417-468-2326

Affordable Ultima® Build-A-Bike® Kits

Display Bikes - Unassembled Motorcycle in a Box

Please review Bike Kit FAQ before sending questions. We do not ship internationally.

NOTICE:  There are some new Ultima bike kits being shown on their website;  the Hot Rod Bobber, the Prostreet & Fat Bastard part 3.  They are NOT availaible at this time, and will not be until next year (if they are at all) according to the people we spoke to at Midwest/Ultima.

PRICES:  Due to the large amount of backordered parts at Midwest/Ultima (typical for all suppliers this time of year) we have raised our prices.  This is to cover the extra cost incurred by having to find and buy the parts elsewhere.  But be assured, when you buy from us, you WILL get ALL your parts. (If you are pricing kits somewhere else, ask them how they handle back-ordered parts;  most places DON'T.)

Free book "How to Build a Kit Bike" and promotional package with purchase of any kit. Or purchase book here or by phone, get refund of price when you buy your kit!

New! Lower prices - we got a better deal, so you do too! You get: free shipping, no handling fees, no hidden costs, no sales tax, and customer support through your entire project! Prices start at $10,575.00 including shipping. Steel Thunder Custom Cycles is a Licensed and Bonded Motor Vehicle Dealer in the State of MO. See Our Credentials.

EPA - It has been determined that the EPA cannot regulate private motorcycle building.

NEW!  Build your own hard saddlebags for your kit! See Hardstreet complete saddlebag kits HERE.

NEW!

All new designed Silver Horse complete bike kit from Ultima - build your own motorcycle!

The Silver Horse Chopper

See Vic's Silver Horse Chopper Kit Build

 

PLEASE NOTE:

Many sites are still using outdated photos of the old (discontinued several years ago) Silver Horse bike kit (they don't even know what they are selling!)

This is the all new design of Silver Horse. 

The Silver Horse Chopper Kit

The Silver Horse Chopper bike kit from Ultima.

The the Silver Horse ® Chopper Showbike build-a-bike kit features . . .
a 107 C. I. El Bruto® Engine (Call for other engine options)
Polished 6-Speed Transmission
Chrome ThunderFire® Starter Motor
3.35" Ultima® Drag Race Style Belt Drive
Ultima® Front End
Ultima® Billet Forward Controls
Ultima® Solo Seat
Ultima® 250 Series Softail Style Frame
and many other chrome accessories & the parts you need to build this motorcycle.

Any Engine Size, same price! (El Bruto 100", 113", 120", 127") Choose style:

Silver Horse with Natural Engine ... $13,345.00 including free shipping!*

Silver Horse with Black Engine ... $13495.00 including free shipping!*

Silver Horse with Polished Engine ... $13,895.00 including free shipping!*

Please note that all our kits come with 6 speed transmissions.

Call toll-free today: 1-866-889-7828.

Click Here to see More Photos

Click here to see changes and upgrade options.

NEW!

American Pirate Bike Kit.  Complete motorcycle kit from Ultima/Mid-West.

The American Pirate; Chopped Bobber style with a Springer Front End.

The American Pirate Bobber

American Pirate complete bike kit from Ultima.  Build your own retro chopper! With spring seat,  turned up pipes and apehanger handlebars.

The American Pirate Bobber Motorcycle Kit come with the following major components and everything else you need to BUILD YOUR OWN BIKE!!

Polished 100 C.I. El Bruto® Engine,
Polished Ultima®6 Speed Transmission, BDL® 3"Belt Drive,
Springer Front End, Ultima® 250 Series Rigid Frame,
Rake 34 Degrees, 4² Stretch in Downtubes,
60 Spoke Ultima® Rear Wheel, 40 Spoke Front,
250 Series Avon Venom Tire,
Ultima® Brake Calipers,
Ultima Saddles® Spring-Mounted Solo,
Big Growl® Pipes, Bullet Headlamp,
Bullet Turn Signals,
Ultima® Round Oil Tank,
Chrome Horse® Forward Controls,
Digital Speedo & Tach & Much more.

Please note that all our kits come with 6 speed transmissions.

Click Here for More Photos

Any Engine Size, same price! (El Bruto 100", 113", 120", 127")  Choose style:

American Pirate with Natural Engine ... $12,835.00 including free shipping*

American Pirate with Black Engine ... $12,985.00 including free shipping*

American Pirate with Polished Engine ... $13,685.00 including free shipping*

Click here to see changes and upgrade options.

 

New Black Cloud complete bike kit from Ultima - old school cool

Black Cloud - old school style

 

See Parts List

SEE BUTCH AND SEAN'S BLACK CLOUD BUILD

See Black Cloud Winners (including Butch & Sean's bike) in November's Iron Works Magazine!

Ultima's Black Cloud - Old School Cool meets New Skool Kool.

Complete kit features 120 horsepower engine with 125 lb ft torque, Ultima 6 speed tranny, Big Growl Snub Nose Exhaust, Massive 10 inch over Fat Bastard Chrome Forks, 250 Series tire, billet Maltese Cross Wheels, Pulleys, and Rotors, super stretched steel tank, round oil tank, Billet Maltese Cross Taillight/Licence Plate, Internal Throttle Controls, billet forward Controls, Ultima Solo Seat, Ultima Drag Race Style Belt drive with outboard support, Large Billet Headlamp, and much, much more. AND NOW YOU CAN MAKE CHANGES TO THIS KIT!

AVAILABLE NOW! 1-866-889-7828

Ultima's Black Cloud  motorcycle kit is old school cool, complete and maxed out with style...

Frame is 1.39' with 38 degree rake, 8" stretch in front downtubes, 5" stretch in the backbone.

Please note that all our kits come with 6 speed transmissions.

Any Engine Size, same price! (El Bruto 100", 113", 120", 127") Choose style:

Black Cloud with Natural Engine ... $14,835.00 including free shipping!*

Black Cloud with Black Engine ... $14,985.00 including free shipping!*

Black Cloud with Polished Engine ... $14,685.00 including free shipping!*

Call toll-free today: 1-866-889-7828.

 

Click here to see Photos & Specs......

We will have prices up soon.  Call or write if you need info now.

Click here to see changes and upgrade options.

Thunder Horse - a stock softail style motorcycle kit

Thunder Horse - stock softail style

Ultima's Thunder Horse complete stock softail style motorcycle kit. Options are available.

Silver Horse Motorcycle Kit - click here for more photos and informationClick for Photos & Specs

We will have prices up soon.  Call or write if you need info now.

Please note that all our kits come with 6 speed transmissions.

Any Engine Size, same price! (El Bruto 100", 113", 120", 127") Choose style:

Thunder Horse with Natural Engine ... $11,075.00 including free shipping!*

Thunder Horse with Black Engine ... $11,225.00 including free shipping!*

Thunder Horse with Polished Engine ... $11,675.00 including free shipping!*

Click here to see changes and upgrade options.

PRICES INCLUDE SHIPPING within continental U.S.A.

 

 

Fat Bastard - a wide drive softail style motorcycle kit

Fat Bastard - wide drive softail style

See Parts List

SEE CHUCK BUILD HIS FAT BASTARD KIT

SEE RICHIE'S FAT BASTARD BUILD

SEE ROCKY'S FAT BASTARD BUILD

NEW! See Ross the Aussie's Fat Bastard Bike Kit Build

See 250 Fat Bastard Below

Ultima's Fat Bastard complete wide drive softail style motorcycle kit. Options are available.

Click for Photos & Specs

Fat Bastard wide drive softail motorcycle kit - click here for more photos and infoWe will have prices up soon.  Call or write if you need info now.

Please note that all our kits come with 6 speed transmissions.

Rake on Fat B frame is 34 degrees, 2 inch stretch, 1.5 inch stretch backbone.

 

Any Engine Size, same price! (El Bruto 100", 113", 120", 127") Choose style:

Fat Bastard with Natural Engine ... $11,575.00 including free shipping!*

Fat Bastard with Black Engine ... $11,725.00 including free shipping!*

Fat Bastard with Polished Engine ... $12,173.00 including free shipping!*

Please note that all our kits come with 6 speed transmissions.

Call toll-free today: 1-866-889-7828.

Click here to see changes and upgrade options.

PRICES INCLUDE SHIPPING within continental U.S.A.

Fat Bastard 250

Similar to the Fat Bastard, with a 250 wide rear tire.

 

CLICK HERE TO SEE C.M.'s FAT BASTARD 250 BUILD

New Fat Bastard 250 -  even wider rear tire!  Click  image to see larger photo.  More photos soon! Ultima's Fat Bastard 250

Now with an even wider rear tire! You asked for it, you got it.

More photos and details.

Any Engine Size, same price! (El Bruto 100", 113", 120", 127")  Choose style:

Fat Bastard 250 with Natural Engine ... $12,600.00 including free shipping!*

Fat Bastard 250 with Black Engine ... $12,750.00 including free shipping!*

Fat Bastard 250 with Polished Engine ... $13,150.00 including free shipping!*

Please note that all our kits come with 6 speed transmissions.

Call toll-free today: 1-866-889-7828.

Rake on Fat B 250 frame is 34 degrees, 4 inch stretch, 2.5 inch stretch backbone.

Kits come with Natural Engines.

Click here to see changes and upgrade options.

Wolf Daddy - a wide drive rigid style motorcycle kit

Wolf Daddy - wide drive rigid style

See Parts List

SEE RON'S WOLF DADDY BUILD

SEE JERRY'S WOLF DADDY WITH SPRINGER FRONT END - just one way to use your options to create your own custom build!

Ultima's Wolf Daddy complete wide drive rigid style motorcycle kit. Options are available.

Wolf Daddy - wide drive rigid motorcycle kit - click here for more photos and informationClick for Photos & Specs

Any Engine Size, same price! (El Bruto 100", 113", 120", 127")  Choose style:

Wolf Daddy with Natural Engine (your choice size) ... $11,795.00

Wolf Daddy with Black Engine (your choice size) ... $11,935.00

Wolf Daddy with Polished Engine (your choice size) ... $12,335.00

Please note that all our kits come with 6 speed transmissions.

PRICES INCLUDE SHIPPING within the contiguous 48 U.S. States. We ship only within the U.S.

Rake on Wolf Daddy frame is 34 degrees, 4 inch stretch.

Kits come with Natural Engines.

Click here to see changes and upgrade options.

PRICES INCLUDE SHIPPING within continental U.S.A.

Want more of a chopper look for your bike kit? We can get you more of a rake by changing the trees and forks, for NO EXTRA CHARGE.

Several ways to navigate this site! Use this navigation bar or go to our SITE MAP for an alphabetical listing and search tool.

Home Page - Steel Thunder Custom Cycles

Bike Kits- Complete Motorcycle Kits & Rolling Chassis Kits
Electrical - Electronic and points type ignition parts & accessories, headlights, taillights, turn signals, license plate mounts, horns, batteries & related, wiring & wiring harnesses.
Frame/Body - Frames, rear forks, fenders, shocks, seats, engine mounts, jiffy stands, footrests, footboards, highway bars, luggage racks, sissy bars, saddlebag supports and related items. Mirrors.
Front End - Front forks, fork brackets, headlight housings & covers, fork tubes, & internals, fork sliders, springer front ends and springer related parts, windshields.
Control - Brake lines & fittings, cables, forward controls, handlebar controls, handlebars & related, speedometers, tachometers, dashes & related, mirrors, rear brake control & related, shift controls and jockey control parts.
Wheel - Wheel assemblies, axles & related parts, brake discs, brake pads, brake calipers & related, brake disc hardware, drum brakes, wheel hubs & related, rims, spokes, tires and inner tubes.
Engine - Engines and parts on and in the engine and started drive parts (excluding electrical, ignition and carburetor.)
Drive Train - Everything for Standard and Wide Tire primary drive train and final drive train, transmissions, shifters, kick starters, clutches, drive chains, chain adjusters, sprockets, belt drives, chain covers, chain guards and all related parts.
Fuel (Gas, Oil, Air) - Gas tanks & hardware, gas tank prep, carburetors, carburetor rebuild kits, nitrous kits, EFI parts, manifolds, oil filters, oil line kits, oil coolers, oil tanks & hardware, oil pressure gauges and oil temperature gauges, oil.
Exhaust - Exhaust systems, drag pipes, baffles, mufflers, heat shields, exhaust gaskets, exhaust studs and hardware, brackets and clamps.
General Merchandise- Tools, Clothing, Books & Manuals, Catalogs, Security, Hardware, Decorative Items, Clearance & Closeout Items, Saddlebags, Trailers.
Motorcycles -Motorcycles For Sale
Tech & Info - contact us, frequently asked questions, our credentials, terms & conditions
Photos, Fun & Links - photo pages, free biker ecards, jokes, banner links, text links, link to us, webmaster's awards
Sportster Pages - main index to Sportster product pages
Site Map - index of web site in alphabetical format. Can't find it? LOOK HERE

OPTION: Upgrade you wheels for as low as $450!

Click here to see changes and upgrade options.

Ultima Engines are MADE IN THE U.S.A. and have a transferable warranty.  100/113" Engines have a 24 month warranty, and the 120/127" Engines have a 12 month warranty.

Ultima engine and Ultima El Bruto engine info.

Frames cannot be changed on kits.  All the parts have been fitted to these frames.

Optional items may cost extra. We will work up a quote for you if you tell us what you want. Please write down the part #'s of the kit, wheels, etc. The available options for these Ultima complete kits are as noted on description pages. Freight charge is included in price. Kits are shipped by truck. Free shipping to continental U.S. only. Preferred payment by wire transfer. Checks accepted, but require 2 weeks to clear. No charge cards.

Steel Thunder Custom Cycles is a Licensed and Bonded Motor Vehicle Dealer in the State of MO. See Our Credentials.

 

or call 417-468-2326  - Please review Bike Kit FAQ before sending questions. We do not ship internationally.

Toll-Free Order Line: 1-866-889-7828 call 9-5 CST M-F

We've got some photos of built kits on our Bikes page.

 

These kits must be assembled by qualified mechanic. They come unassembled and without paint.

BUILD YOUR OWN MOTORCYCLE!

 

Steel Thunder Custom Cycles

152 York Drive

Marshfield, MO 65706

417-468-2326

Come visit our store, North off I-44, behind Prarie Plaza.

Kendon Motorcycle Trailers

 

 

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With God all things are possible.

*FREE SHIPPING APPLIES IN CONTINTENTAL 48 UNITED STATES ONLY. AK, HI and APO/FPO will have additional shipping fees. We ship only within the U.S.A. and to APO/FPO (military addresses; weight and size restrictions apply.). We do not accept foreign credit cards. We do not ship to Puerto Rico.

Prefer to call in your order to Steel Thunder? Call toll-free: 1-866-889-7828. 9-5 CST M-F.

FREQUENTLY ASKED QUESTIONS

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Please note that all prices are subject to change.