Chassis Kits

Redneck Engineering Mutant Buell Frame and Body Kits

We’re proud to be a distributor for Redneck’s Engineering’s full line-up of Sportster and Buell conversion frame and body kits. Available for both the Evolution Sportster (1986-2003) and Buell (1995-2002) engines as well as the new XB style Buell (2003-present) engines and components, these three distinct chassis designs make the perfect foundation piece for nearly any Sportster or Buell chopper conversion, and will help you build the custom of your dreams for a fraction of the cost of most big twin kit bikes or generic bike-in-a-box kits. If you have any questions at all about fitments with your donor bike, or if you’d like to order a Mutant frame and body kit please call give us a call or drop us a line at justin@twobitchoppers.com and we’ll do our absolute best to help you start on the road to owning your very own Mutant.

The Original Mutant Buell Chassis

Long, low and dripping with bloody brass-knuckle attitude, the Redneck Engineering Mutant Buell chassis is the perfect platform on which to build your dream XL-based chopper. With 40-degrees of rake in the neck, three inches of backbone stretch and an inch drop in its wishbone style down tubes, it’s one of the best looking, no nonsense pro-street style frames to come around in ages, and with tig-welded 1.25" and 1.5" inch tubing throughout, it will be around for ages more no matter what you throw at it. Will fit up to a 200-series rear tire in standard configuration with the stock belt drive, but is also available set-up for wide tires up to 300-series. Best of all, it accepts a majority of the larger components off your Buell, including the entire power train, front end, wheels and brakes. Available as a frame only, or complete with pre-mounted body work.

Standard Mutant Frame Only Kit
(Evolution XL/Buell)
$1995.00
Standard Mutant Frame Only Kit
(XB Buell)
$1995.00
Standard Mutant Frame and Body Kit
(Evolution XL/Buell)
$2995.00
Standard Mutant Frame and Body Kit
(XB Buell)
$2995.00
Standard Mutant Drop Stretch Tank Option
( add $500 )
$500.00

Pricing -
Frame Only Kit $2295* - includes frame, oil tank, hidden fork stops, axle, choice of Two-Bit Choppers axle covers and battery tray.

Frame and Body kit $3295* - includes frame, oil tank, hidden fork stops, axle, choice of Two-Bit Choppers axle covers, battery tray, pre-mounted late sporty tank with flush bottom mounts, pre-mounted, internally strutted rear fender, welded steal seat pan.

Frame and Body Kit with Drop Stretch Tank Option $3795* - includes frame, oil tank, hidden fork stops, axle, choice of Two-Bit Choppers axle covers, battery tray, pre-mounted dropped and stretched sporty tank with flush bottom mounts, pre-mounted, internally strutted rear fender, welded steal seat pan.

The New Mutant Bobber Chassis

Looking for a vintage bobber-style look? Then the new Redneck Engineering Mutant Bobber chassis is probably just what you’ve been after. With a line reminiscent of the bobbers and board trackers of the 1930's and 40's, this chassis lends itself to old school springer builds, as well as cool new/old conversions using your existing Buell suspension components, brake system and wheels. The “standard” Mutant Bobber chassis is designed around a 180 or 200 series tire re-using the stock drive belt, but can be special ordered to accommodate tire up to 300 series. Tig welded from 1.25" and 1.5" tubing throughout, this new chassis will sustain decades of abuse, all the while delivering a show stopping custom without the jaw-dropping price.
Pricing -
Frame Only Kit $2795* - includes frame, oil tank, hidden fork stops, axle, choice of Two-Bit Choppers axle covers and battery tray.
Frame and Body kit $4295* - includes frame, oil tank, hidden fork stops, axle, choice of Two-Bit Choppers axle covers, battery tray, pre-mounted gas tank with flush bottom mounts, pre-mounted, internally strutted rear fender, steal springer seat pan.

The Mutant Bobber Chassis Kit
( Evolution XL/ Buell )
$3995.00
The Mutant Bobber Chassis Kit
( XB Buell )
$3995.00
The Mutant Bobber Frame Only Kit
( Evolution XL/ Buell )
$2495.00
The Mutant Bobber Frame Only Kit
( XB Buell )
$2495.00


The New Mutant Curves Chassis

If you’re looking to build a bike that’s guaranteed to get looks wherever you go, then the Mutant Curves chassis is for you. Using state-of-the-art chassis design, the minds at Redneck Engineering have taken their wildly popular big twin Curves frame design and adapted it to accept the Sportster and Buell powerplants to create a four cam chopper frame like the world has never seen. With it’s sweeping, curved backbone, single down tube and extreme drop seat rear section, the Curves chassis is like no other Sportster/Buell conversion frame on the market today. Add Redneck’s one of a kind smooth line gas tank and integrated oil tank/rear fender design and you’ve got a rock solid foundation to build a Sporty/Buell chopper that will make everyone stop and take notice. Can be ordered in an dimensions, including the 3-out, 1-down with 40-degree rake needed to re-use most of your Buell components. Standard Curves frame will accept a 180-200 series tire using the stock Buell drive belt system, but frame can be ordered to accommodate up to a 300 series wheels and tire.

Pricing -
Frame and Body kit $6500* - includes frame, hidden fork stops, axle, choice of Two-Bit Choppers axle covers, battery tray, pre-mounted custom gas tank with flush bottom mounts, pre-mounted, internally strutted rear fender with integrated oil tank, welded steal seat pan.

* - Price includes UPS ground shipping within the continental United States. For international shipping rates please contact Two-Bit Choppers for a quote.