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Custom Hardtail Kits and Hardtail frames for Sportsters and Shovelheads for sale at Throttle Addiction

Hardtail kits versus full custom frames

One of the best ways to turn your stock motorcycle into a chopper is to hardtail the frame. There are many advantages to using a hardtail on your stock frame. The most notable advantage is the avoidance of a special construction title which comes when building a chopper using a full custom aftermarket frame.

Hardtail kits Made in the USA

Throttle Addiction offers weld-on hardtail kits for Harley-Davidson Sportsters, in addition to Big Twin Shovelhead and Panhead frames. Our hardtail kits can be purchased in deluxe form which includes a sissy bar, fender and oil tank, or individually. We offer specific parts that go with each kit so your chopper project can come together as smooth as possible. All of our weld-on hardtails are made by Throttle Addiction at our facility in Eau Claire, WI.

 

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  • Throttle Addiction Deluxe Evolution Sportster Hardtail Kit 1982-2003 Throttle Addiction Deluxe Evolution Sportster Hardtail Kit 1982-2003 Throttle Addiction Deluxe Evolution Sportster Hardtail Kit 1982-2003 Throttle Addiction Deluxe Evolution Sportster Hardtail Kit 1982-2003 Throttle Addiction Deluxe Evolution Sportster Hardtail Kit 1982-2003

    Throttle Addiction

    Deluxe Evolution Sportster Hardtail Kit 1982-2003

    This weld on Sportster hard tail kit will transform you stock swing arm evolution Sportster into a hard tail chopper in minimal time.  This Kit was original designed and manufactured by the Haifley Bros in Phoenix Arizona.  Throttle Addiction...

    $1,299.99 - $1,619.98
  • Throttle Addiction Sportster Chrome K Model Oil Tank Throttle Addiction Sportster Chrome K Model Oil Tank Throttle Addiction Sportster Chrome K Model Oil Tank Throttle Addiction Sportster Chrome K Model Oil Tank Throttle Addiction Sportster Chrome K Model Oil Tank

    Throttle Addiction

    Sportster Chrome K Model Oil Tank

    Finding an oil tank for the early Harley Sportster K model's has been a difficult task until now.  These reproductions have all the accurate stampings and sizing as the originals.  They feature cleaner welds for a more finished look...

    $179.99
  • Throttle Addiction Panhead / Shovelhead Weld-On Hardtail With Cast Axle Plates Throttle Addiction Panhead / Shovelhead Weld-On Hardtail With Cast Axle Plates Throttle Addiction Panhead / Shovelhead Weld-On Hardtail With Cast Axle Plates Throttle Addiction Panhead / Shovelhead Weld-On Hardtail With Cast Axle Plates

    Throttle Addiction

    Panhead / Shovelhead Weld-On Hardtail With Cast Axle Plates

    Throttle Addiction Recently acquired the rights and assets of Haifley Bro's motorcycle frame and parts business.  We are now producing these High quality products in our facility in Eau Claire, Wisconsin.  We are using the same fixtures, jigs...

    $699.99 - $729.98
  • Throttle Addiction Sportster Hardtail Brake Caliper Bracket Throttle Addiction Sportster Hardtail Brake Caliper Bracket Throttle Addiction Sportster Hardtail Brake Caliper Bracket Throttle Addiction Sportster Hardtail Brake Caliper Bracket Throttle Addiction Sportster Hardtail Brake Caliper Bracket

    Throttle Addiction

    Sportster Hardtail Brake Caliper Bracket

    Designed for use with our Evolution Sportster Hardtail Kit. This 3/8" thick weld-on caliper bracket works with the stock 2000-2003 HD Sportster rear disc brake caliper (not included). Includes two piece bracket and retaining hardware. Made 100% in the...

    $49.99
  • Hardtail Sissybar - Tall Hardtail Sissybar - Tall Hardtail Sissybar - Tall

    Hardtail Sissybar - Tall

    These hardtail sissy bars designed for use with our Evo Sportster Hardtail Kit, and 5" flat fender, but can fit on most hardtail frames.  Sissy bars are TIG welded and ready for installation. Constructed of 9/16" round stock with 1/4'" fender...

    $169.99
  • Drag Specialties Rear Axle Adjuster Bolts 3/8 - 24 TPI

    Drag Specialties

    Rear Axle Adjuster Bolts 3/8 - 24 TPI

    Chrome Rear Axle Adjuster Bolts fit our Sportster hardtail kits.  Sold in Pairs 3/8" X 24TPI X 3" long fits 48-72 Harley Big Twin and custom applications, OEM# 41576-36 Fits our Sportster hardtail kits.

    $12.99
  • Throttle Addiction King and Queen Seat Pan - Sportster Hardtail Kit Throttle Addiction King and Queen Seat Pan - Sportster Hardtail Kit Throttle Addiction King and Queen Seat Pan - Sportster Hardtail Kit Throttle Addiction King and Queen Seat Pan - Sportster Hardtail Kit Throttle Addiction King and Queen Seat Pan - Sportster Hardtail Kit

    Throttle Addiction

    King & Queen Seat Pan - Sportster Hardtail Kit

    This King and Queen Seat pan is designed to fit perfectly with our Sportster Evo Hardtail Kit.  May work on other hardtail models. Get the seat pan, take it to your local upholsterer and let them go wild. 16 gauge steel. 100% Made in the U.S.A.

    $169.99
  • Throttle Addiction Sportster Hardtail Oil Tank Throttle Addiction Sportster Hardtail Oil Tank Throttle Addiction Sportster Hardtail Oil Tank Throttle Addiction Sportster Hardtail Oil Tank Throttle Addiction Sportster Hardtail Oil Tank

    Throttle Addiction

    Sportster Hardtail Oil Tank

    This oil tank is designed to fit perfectly with the Throttle Addiction weld on Evolution Sportster hardtail.  The center opening is spaced such that an a battery can be placed in it.  It is intended to use our Antigravity battery mounting...

    $329.99 - $354.98
  • Throttle Addiction Evolution Sportster Hardtail 1982-2003 Throttle Addiction Evolution Sportster Hardtail 1982-2003 Throttle Addiction Evolution Sportster Hardtail 1982-2003 Throttle Addiction Evolution Sportster Hardtail 1982-2003 Throttle Addiction Evolution Sportster Hardtail 1982-2003

    Throttle Addiction

    Evolution Sportster Hardtail 1982-2003

    Throttle Addiction is excited to announce that we have purchased all assets and rights to production for the Haifley Bros line of sportster hardtail kits and motorcycle parts.  We will continue producing these parts at the highest quality using the...

    $499.99 - $529.98
  • Throttle Addiction DIY Hardtail Sissy Bar Kit - Tall Throttle Addiction DIY Hardtail Sissy Bar Kit - Tall Throttle Addiction DIY Hardtail Sissy Bar Kit - Tall Throttle Addiction DIY Hardtail Sissy Bar Kit - Tall

    Throttle Addiction

    DIY Hardtail Sissy Bar Kit - Tall

    These DIY hardtail sissy bar kits are designed for use with our Evo Sportster Hardtail Kit, and 5" flat fender, but can fit on most hardtail frames.  Constructed of 9/16" round stock with 1/4'" fender strap and mounting tabs. 9" wide between...

    $109.99 - $124.99
  • Throttle Addiction Sportster Raw K Model Oil Tank - Shell Throttle Addiction Sportster Raw K Model Oil Tank - Shell Throttle Addiction Sportster Raw K Model Oil Tank - Shell Throttle Addiction Sportster Raw K Model Oil Tank - Shell Throttle Addiction Sportster Raw K Model Oil Tank - Shell

    Throttle Addiction

    Sportster Raw K Model Oil Tank - Shell

    Finding an oil tank for the early Harley Sportster K model's has been a difficult task until now.  These reproduction shells have all the accurate stampings and sizing as the originals.  They feature cleaner welds for a more finished look...

    $99.99
  • Throttle Addiction Sportster Hardtail Battery Tray/Hold Down

    Throttle Addiction

    Sportster Hardtail Battery Tray/Hold Down

    Battery tray and hold down designed to secure an Antigravity 12 cell small case battery for use with our Evolution Sportster Hardtail Kit. This weld-on battery tray and hold down mounts to the backside of the seat down tube, allowing the...

    $49.95
  • Throttle Addiction Cobra Seat For Sportster Hardtail Kit - Pleated Throttle Addiction Cobra Seat For Sportster Hardtail Kit - Pleated Throttle Addiction Cobra Seat For Sportster Hardtail Kit - Pleated

    Throttle Addiction

    Cobra Seat For Sportster Hardtail Kit - Pleated

    The Throttle Addiction Cobra seat is designed to fit perfectly on our Evo sportster hardtail.   The front of the seat features a stainless steel tab which slides into the open tube on our hardtail and the back has a tab to bolt to the fender...

    $299.99
  • Gardner Westcott Sportster Hardtail Oil Tank Fitting Kit - Chrome Gardner Westcott Sportster Hardtail Oil Tank Fitting Kit - Chrome Gardner Westcott Sportster Hardtail Oil Tank Fitting Kit - Chrome

    Gardner Westcott

    Sportster Hardtail Oil Tank Fitting Kit - Chrome

    This oil tank fitting kit is designed to fit perfectly with the Throttle Addiction weld on Evolution Sportster hardtail tank. Kit includes - One 90 degree 1/4" barb X 1/4" NPT male fitting (Vent) Two 90 degree 3/8" barb X 1/4" NPT fitting male (Feed...

    $39.99
  • Throttle Addiction Cobra Seat for Sportster Hardtail Kit - Diamond Stitch Throttle Addiction Cobra Seat for Sportster Hardtail Kit - Diamond Stitch Throttle Addiction Cobra Seat for Sportster Hardtail Kit - Diamond Stitch

    Throttle Addiction

    Cobra Seat for Sportster Hardtail Kit - Diamond Stitch

    The Throttle Addiction Cobra seat is designed to fit perfectly on our Evo sportster hardtail.   The front of the seat features a stainless steel tab which slides into the open tube on our hardtail and the back has a tab to bolt to the fender...

    $299.99
  • Hardtail Sissybar - Short Hardtail Sissybar - Short Hardtail Sissybar - Short Hardtail Sissybar - Short

    Hardtail Sissybar - Short

    These hardtail sissy bars designed for use with our Evo Sportster Hardtail Kit, and 5" flat fender, but can fit on most hardtail frames.  Sissy bars are TIG welded and ready for installation. Constructed of 9/16" round stock with 1/4'" fender...

    $169.99
  • Throttle Addiction Solo Seat for Sportster Hardtail Kit - Pleated Stitch Throttle Addiction Solo Seat for Sportster Hardtail Kit - Pleated Stitch Throttle Addiction Solo Seat for Sportster Hardtail Kit - Pleated Stitch Throttle Addiction Solo Seat for Sportster Hardtail Kit - Pleated Stitch Throttle Addiction Solo Seat for Sportster Hardtail Kit - Pleated Stitch

    Throttle Addiction

    Solo Seat for Sportster Hardtail Kit - Pleated Stitch

    The Throttle Addiction Solo seat is designed to fit perfectly on our Evo sportster hardtail.   The front of the seat features a aluminum tab which slides into the open tube on our hardtail and the back has a tab to bolt to the fender...

    $249.99
  • Throttle Addiction Solo Seat for Sportster Hardtail Kit - Diamond Stitch Throttle Addiction Solo Seat for Sportster Hardtail Kit - Diamond Stitch Throttle Addiction Solo Seat for Sportster Hardtail Kit - Diamond Stitch Throttle Addiction Solo Seat for Sportster Hardtail Kit - Diamond Stitch Throttle Addiction Solo Seat for Sportster Hardtail Kit - Diamond Stitch

    Throttle Addiction

    Solo Seat for Sportster Hardtail Kit - Diamond Stitch

    The Throttle Addiction Solo seat is designed to fit perfectly on our Evo sportster hardtail.   The front of the seat features a aluminum tab which slides into the open tube on our hardtail and the back has a tab to bolt to the fender...

    $249.99
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