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

 

Kraft Tech motorcycle frames - made in U.S.A.  Build American from the frame up! Right Side Drive Softail Style Motorcycle Frames

All Kraft/Tech frames are made in the U.S.A. All frames come complete with Manufacturer's Statement of Origin (MSO), shipped separately.

MORE FRAME STYLES

FREE SHIPPING ON ALL FRAMES* Call toll-free to order: 1-866-889-7828.

NEW! Single Downtube Frame

Right Side Drive

Right Side Drive Softail Style Frame for 300 mm wide tire big twin.

Custom Axle Caps.

Fork cups with stops.

HARDBODY RIGHT SIDE DRIVE SOFTAIL STYLE FRAMES FOR 300MM WIDE TIRE BIG TWIN

Designed for use with an alternator type Shovelhead or Big Twin Evolution engine. Includes Manufacturer's Statement of Origin.
Features:
300mm Tire with Rear Belt
1" O.D. Rear Axle with Custom Axle Caps
Welded-in Transmission Mounting Plate
Rubber Mounted Oil Tank with Center Fill Oil Cap
1 3/4" O.D. Curved Single Downtube with .156" wall thickness
1 3/4" O.D. Backbone with .156" wall thickness
1 3/8" O.D. Cradle Tubing with .125" wall thickness
1 1/4" O.D. Rear Fork with .125" wall thickness
Chrome Plated Fork Cups with built-in Fork Stops. Features two different positions for your choice of turning radiuses (requires flat lower fork bracket)
Steel Debris Guard, Custom rear fork Pivot Bolt Covers

Requires:
Right Side Drive Softail type Transmission
10 1/2" wide Right Side Drive Rear Wheel designed for a 1" O.D. Axle
Custom left side mounted Rear Brake designed for a 1" O.D. Axle
Custom flat type Lower Fork Bracket suitable to mount the Slotted Fork Stop Plate to
1986/1999 Softail style Forward Controls
12 1/2" wide Rear Fender and supports
132 tooth 1 1/2" wide Rear Belt with 70 tooth Pulley
Custom fabricated Seat, Gas Tank Mount and Exhaust
1984/1988 or 1989/1999 Softail Shocks
Custom fabricated Fender Supports

Part#:MU20050 42° Rake, -2" Downtube Stretch, +5" Backbone Stretch ... Price $2694.69 including shipping*

Note: As with any frame-up custom build project, it is common shop practice to pre-assemble the entire motorcycle prior to any paint work for compatibility verification of all parts used.

 

NEW! Fits 300 & 330!

Curved Dagger Single Down Tube Frame.

Curved Dagger Softail style frame with hidden axle for 300 & 330 wide tires.

Struts and component kit, including 1" axle.

Curved Dagger Softail Style Frame with Hidden Axle for 300 & 330 Width Rear Tires - Kraft Tech

Frames are made from mandrel bent DOM steel tubing, 2" for the single down tube, 1-3/4" for the backbone and 1-1/2" for the rest. They are designed to accept 300 or 330 width rear tires and any 5 or 6 speed Right Side Drive Softail-Style transmission together with an 1-1/2" rear belt or chain drive.  Engineered with a super strong upper frame design with integral neck webbing that offers unparalleled strength with pleasing aesthetics.  The single down tube merges with the lower frame rails in such a way as to continue the frames smooth lines, often overlooked on other frames.  These beauties are delivered complete with a component kit.  Integral one piece transmission mounting plate is part of the frame structure, assuring unit construction strength and the best possible alignment. Frames are set up with the offset already built in which requires only simple spacing between the engine and inner primary cover as well as additional spacing of engine sprocket or pulley.  Will accept Kraft/Tech oil tanks and our large selection of one piece round top fenders. Made in U.S.A.

Right Side Drive Softail Style Frame for 300 and 330 Width Tires, comes with component kit including 1" diameter axle.  Prices include shipping*. Choose your configuration:

Part #
Rake
Stretch
Backbone Stretch
Price
Buy Now
KW23192
38°
8"
8.5"
$2980.96
KW23193
40°
2"
5"
$2722.86
KW23157
40°
8"
8.5"
$3151.98

NEW!

Curved Dagger Single Down Tube Frame.

Curved Dagger Softail style RSD frame for wide tires.

Component kit included, has 1" diameter axle.

Detail of frame.

Curved Dagger Softail Style Frame with Hidden Axle for 280 Width Rear Tires - Kraft Tech

Frames are made from mandrel bent DOM steel tubing, 2" for the single down tube, 1-3/4" for the backbone and 1-1/2" for the rest. They are designed to accept 280 width rear tires and any 5 or 6 speed Right Side Drive Softail-Style transmission together with an 1-1/2" rear belt or chain drive.  Engineered with a super strong upper frame design with integral neck webbing that offers unparalleled strength with pleasing aesthetics.  The single down tube merges with the lower frame rails in such a way as to continue the frames smooth lines, often overlooked on other frames.  These beauties are delivered complete with a component kit.  Integral one piece transmission mounting plate is part of the frame structure, assuring unit construction strength and the best possible alignment. Frames are set up with the offset already built in which requires only simple spacing between the engine and inner primary cover as well as additional spacing of engine sprocket or pulley.  Will accept Kraft/Tech oil tanks and our large selection of one piece round top fenders. Made in U.S.A.

Right Side Drive Softail Style Frame for 280 Width Tires, comes with component kit including 1" diameter axle.  Prices include shipping*. Choose your configuration:

Part #
Rake
Stretch
Backbone Stretch
Price
Buy Now
KW23152
38°
2"
5"
$2642.58
KW23154
40°
8"
8.5"
$3151.98

Right Side Drive softail style frame, permits use of 250 rear tire and 1 1/2 inch wide drive belt without offsetting the engine.  The best way to install a 250 series tire!

 

RIGHT SIDE DRIVE

Fits 250 series rear tire and a 1 1/2 inch wide drive belt without offsetting the engine! Best way to install a 250 series tire.

 

 

Right Side Drive Frame for Wide Tire Big Twin - Hardbody by Rolling Thunder

Features:
Right side drive permits the use of a 250 series rear tire and 1 1/2 inch wide drive belt without offsetting the engine. This method is by far the best way to install a 250 series tire. It keeps the mass centralized producing a better handling motorcycle.
Single down tube (from the steering neck to the front engine mount) adds an unmistakable custom look.
1 inch O.D. rear axle designed to withstand maximum torque from a large displacement engine.
Fat look 1 3/8 inch O.D. engine cradle and rear fork tubing made from high strength Drawn Over Mandrel (DOM) steel with .120 inch wall thickness.
The shock mounts are positioned to provide a 1 inch lower than stock seat height.
Built-in fork stop designed to be used with a billet type fork bracket (flat lower tree) or our HARDBODY by Rolling Thunder Springer front end.
Will accept up to .500 inch taller than stock Evolution engine and still be able to remove the rear rocker cover for service.
Flat type debris guard is included.
100% TIG welded construction for maximum strength and durability.
All individual frame components (other than the tubing) are CNC machined from billet steel.
3 1/2 quart oil tank with mounting brackets is included.
Flush mounted rear fork pivots.
Integrated transmission mounting plate.
Hidden axle adjuster bolts.

38 degree rake with no stretch in the front down tubes and 2 inch stretch in the backbone.
Part#:MU20087... $3367.76 including shipping*


 

 

Right Side Drive, Single Loop Frame, Fits 230/280 or 280/300 Rear Tire, depending on frame choice.

Single loop Right Side Drive Frame for Big Twin Engine. By Rolling Thunder.

44° Rake, -2" Downtube Stretch, +6" Backbone Stretch
Fits 230/280 series Rear Tire with 1 1/2" Drive Belt

OR

Rolling Thunder Single Loop Frame fits 280/300 series tire.

35° Rake, 0" Downtube Stretch, 0" Backbone Stretch
Fits 280/300 series Rear Tire with 1 1/2" Drive Belt

 

 

 

 

 

 

 

 

 

Troubadour gas tank fits single loop rolling thunder frame with =6 backbone and -2 downtube stretch.

Troubadour Gas Tank for frame #MU20088

SINGLE-LOOP RIGHT SIDE DRIVE FRAME FOR BIG TWIN ENGINE -
Hardbody by Rolling Thunder

Special Features:
1" O.D. rear axle with totally hidden ends.
Fork stop tab integrated into the steering neck.
Included fork stop plate that bolts to custom fork brackets (flat type lower).
Low profile rubber mounted center fill type oil tank that holds 3 1/2" quarts.
Engine mounts are not offset keeping the weight centralized in the frame.
Welded-in transmission mounting plate for super strength and proper alignment.
Reinforced rear fork provides a swingarm look yet retains the "under the transmission" shock location (2" O.D. main arm & 1 1/2" O.D. brace).
1 1/2" wide drive belt can be used with up to a 10 1/2" wide wheel.
For strength all tubing is made from .125" wall thickness 1020 DOM steel.
100% TIG welded.
Fat look is accomplished by using 1 1/2" & 2" O.D. tubing.
Includes Manufacturer's Statement of Origin (shipped separately).
Includes low seating position, forward control mounts, fork mounted stop for flat type lower bracket and rubber isolated oil tank mounts.

Required Components:
Right side drive Softail style transmission (5 or 6 speed type) can be found in Drive Train Section. (You will receive catalog with purchase.)
Alternator type Shovelhead or Big Twin Evolution engine (any height).
Flat style lower fork bracket suitable for installing the included fork stop plate.
Rear shocks & mounting hardware for Softail 1984/1999 (will also accept large bodied air shocks such as Legends brand).
Sealed type battery (due to the horizontal mounting position in the low profile oil tank) that measures 6 7/8" long x 3 1/4" wide x 5 1/8" tall such as our MU10023.
Rear fork pivot bearings for Softail 1984/1999.
Cut to fit oil lines.
Left side rear brake caliper for 1" axle.
Rear wheel with 1" I.D. bearings.
Fabricated Parts.
Gas tanks & mounts.
Regulator/rectifier mount.
Seat & mount.
Exhaust & mount.
Rear fender & supports.
Debris deflector.

Part#:MU20088 - 44° Rake, -2" Downtube Stretch, +6" Backbone Stretch - Fits 230/280 series Rear Tire with 1 1/2" Drive Belt ... $4144.14 including free shipping*

Part#: MU20089 - 35° Rake, 0" Downtube Stretch, 0" Backbone Stretch - Fits 280/300 series Rear Tire with 1 1/2" Drive Belt Price ... 4144.14 including free shipping*

Note:
These are totally custom frames that require advanced fabrication skills. As with any frame-up custom build project, it is common shop practice to pre-assemble the entire motorcycle prior to paint work for compatibility verification of all parts used.

TROUBADOUR GAS TANKS FOR CUSTOM USE - Independent Gas Tank Co.
Raw Steel, Includes Pop-Up Cap. 5.5. gallon one-piece Tanks provide a smooth flowing look that complements the frame geometry. Made from 16-gauge steel these tanks have a 28" overall length and are 15" wide at the front. Front of the tank is tapped 1/8-27 NPT for a crossover line and has a left side bung for a 22mm (13/16") fuel valve. Tail section is false at seat area for custom seat fitment. Includes hidden mounts and mounting hardware.

Fits Rolling Thunder Single Loop (SLX) Rigid or Softail style Frames with a +6" Backbone Stretch and a -2" Downtube Length - Part#:MU81096 ... $1086.75 including free shipping*.

ETA 12/10/07

MORE FRAME STYLES

Kraft Tech frames are made of DOM steel, TIG/MIG welded, and frames will accept Evolution motors (except Twin Cam unless otherwise noted), Shovelhead & Panhead engines with clearance for cylinder up to 0.200" taller than stock Evolution. Made in USA. All frames come complete with manufacturer's Statement of Origin (MSO). Only frames listed as Kraft Tech are Kraft Tech.

Confused about frame terminology? See tech tip #9. See tech tip #10 for a rake and trail calculator. TECH TIP PAGE

You will receive a free catalog with your frame order, to help you with your bike building project. We will be glad to give you any assistance you need in choosing parts to fit.

*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.

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Please note that all prices are subject to change.