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Hardtail Kits

Throttle Addiction offers weld-on hardtail kits for Sportster and Big Twin Shovelhead / Panhead frames.  Our kits can be purchased in deluxe form or individually.  We offer specific parts that go with each kit so your chopper project can go together as smooth as possible.  

  • Haifley Bros Evolution Sportster Hardtail Haifley Bros Evolution Sportster Hardtail

    Evolution Sportster Hardtail 1986-2003

    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...

    $559.99 - $589.98
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  • Throttle Addiction Deluxe Evolution Sportster Hardtail Kit Throttle Addiction Deluxe Evolution Sportster Hardtail Kit

    Deluxe Evolution Sportster Hardtail Kit

    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 - $1,344.98
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  • 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
    Out of Stock
  • Sportster Kit Disc Brake Caliper Bracket - Throttle Addiction Hardtail Sportster Kit Disc Brake Caliper Bracket - Throttle Addiction Hardtail

    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...

    $44.95
    Out of Stock
  • Rear Chain Adjuster Bolts Chrome - Throttle Addiction

    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
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  • Sportster Hardtail Sissybar Tall - Throttle Addiction Sportster Hardtail Sissybar Tall - Throttle Addiction

    Sportster 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. Choose from our classic standard height bar or the new "Shorty" bar. Sissy bars are assembled and ready for...

    $169.99
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  • 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
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