www.chinamotorworld.com
Expert
Paul Funk
Jeremy Hamilton
John Glimmerveen
Paul Funk
Reza Masiha
Dimitri Hettinga
Doug Stabler

SEVEN: A Custom Speedway Racer by LC FABRICATIONS

Date:06-01-2017 Source:chinamotor

LC Fabrications is run by Jeremy Cupp. When I saw photos of him working on his latest build I was blown away by the details, and it didn’t took long for me to give him an email and ask him for the photos of the finished bike.

Jeremy took inspiration for the builds from the Harley-Davidson CAC Speedway Racer, a bike originally released in 1934 due to customer demand for a factory-spec racing motorcycle to compete in speedway events.


The low-slung hard-tail frame, small fuel tank, minimal front suspension and notable absence of a braking system have inspired speedway motorcycles for decades.

Although I’m personally not a big fan of speedway or the bikes it’s performed on, this is something completely else, even think that with a longer fork and normal tires (please people, knobbly tires are only useful/ looking good on off-road bikes) it would make an awesome chopper.

The bike is named Seven, and at first sight the the engine was a bit of an enigma. Jeremy has somehow mated a Ducati head to a Buell cylinder, then paired it with a Triumph gearbox and made it all work flawlessly. This guy seriously knows what engineering is.

To create the feel of the HD CAC speedway racer, Jeremy chose a Buell Blast 500cc engine as his starting point. He mentioned that the Ducati head had to be modified in order to work correctly, which I think is a bit of an understatement – the entire cam chest was modified to use a series of idler gears to drive the lower belt pulley.

Once the engine was sorted, Jeremy started working on a classic Triumph transmission. He used a modern Triumph hydraulic clutch slave and the pre-unit structure of the power-train fits the CAC feel perfectly.

A custom frame was then created from steel tube and a custom oil tank, rear fender, engine shield and fuel tank were handmade from aluminum by Jeremy to complete the look.


Those of you looking at the front suspension wondering what’s happening there will be glad to learn that its an entirely unique design for this bike using a combination of a springer with a Showa upside down fork  (the spring has been removed from the Showa so they only act as dampeners and the springer does what his name says) .


Jeremy is developing a production run on this front fork design that he calls the Hydro-Springer which will bolt on to the the stock Harley-Davidson Narrow Glide frame.

Jeremy’s work has been growing in fame throughout the custom motorcycle community, and this particular build was shown with much approval at famous custom motorcycle photographer Michael Lichter’s latest Sturgis exhibit.

More about Custom Motorcycle Design at : www.paulfunkdesign.com

Back to list>>
Previous:Employees v.s. Employers
Next:The Swedish Longbike Chopper: The S&S Bike and the Longfork I Crashed