Hardtail Kits

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...

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...

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...

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...

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...

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.

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.

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...

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...

Throttle Addiction

King & Queen Seat For Sportster Hardtail Kit - Diamond Stitch

The Throttle Addiction King and Queen seat is designed to fit perfectly on our Evo Sportster Hardtail.  They pair up perfectly with the sissy bar included with the deluxe hardtail kit.  The front of the seat features a stainless steel tab which...

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...

Throttle Addiction

King & Queen Seat For Sportster Hardtail Kit - Pleated Stitch

The Throttle Addiction King and Queen seat is designed to fit perfectly on our Evo sportster hardtail.  They pair up perfectly with the sissy bar included with the deluxe hardtail kit.  The front of the seat features a stainless steel tab which...

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...

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...

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...

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...

VTwin MFG

3/4" Chrome Rear Axle Kit- 10.25" Long - Fits Shovelhead Hardtail Kit

Rigid style rear axle kit has a 10-1/4" bearing surface length with an outer diameter of 3/4".The rigid frame disc brake rear axle is for use when 1973-up rear disc brake units are installed on rigid frames. Rear axle kit includes 3/4" outer diameter...

Extended Rear Drive Belt for use with Sportster Hardtail Kit

This extended length belt is the perfect size for use with the Throttle Addiction Hardtail Sportster kit.  Our Hardtail kit extends your bike by 2 inches so running the stock belt isn't possible.  If you prefer the reliability and simplicity of...

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...

Drag Specialties

Extended Positive Battery Cable For Sportster Hardtail Kit

This extended positive battery cable is intended to fit perfectly with the Throttle Addiction weld on Evolution Sportster hardtail kit utilizing the Antigravity 12 cell battery. Proper lug size for starter lug and Antigravity positive battery...

Throttle Addiction

Sportster Hardtail Solo Seat Pan

Seat pans are designed to fit perfectly with our Sportster Evo Deluxe Hardtail Kit.  16 gauge steel. 100% Made in the U.S.A.

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...

Throttle Addiction

Sportster Hardtail Cobra Seat Pan

Seat pans are designed to fit perfectly with our Sportster Evo Deluxe Hardtail Kit.  16 gauge steel. 100% Made in the U.S.A.

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...

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...

Paughco

Knucklehead Panhead Shovelhead hardtail Lower Frame Fender Bracket

Nnucklehead, Panhead and Shovelhead hardtail Lower rear frame fender bracket to be welded on for restoration or repair.   Made in the USA   Fitment FL 1941-1957 EL 1936-1952 Throttle Addiction Shovelhead hardtail