BSA 1971 Thunderbolt SOLD 11-20-12

1971-BSA-001_edited-1Bike designed and built by Decent Cycles.  This is one of a pair of bikes; the second is a 1972 BSA Lightning.  It was intended that these bikes be sold as a pair; they look very similar as you can see. As seen in the month of May 2009 Brit Bike Calendar. Now with new paint work.

The motor was rebuilt by E & V Engineering, Howard City, Michigan.  Special head flow work, cast iron oil pump, SRM oil pressure relief valve, balanced crankshaft, all new bearings and bushings, transmission tuned, positive shifts in all gears, all new clutch plates, new fasteners, new pistons (J&E) .040 over- motor is in A-1 condition.  A new duplex primary chain has been fitted.  A Norton type oil filter has been added, all plumbing is done with auto transmission line, and all the fittings are Oetiker type.  All fluids have been changed three times during a careful break in. Now has 1000 miles on the bike. A fender drop kit has been added.


Brand new cloth wrapped wiring harness, which runs the Podtronics regulator, ISO mounted.  All connections made with professional crimper and are heat shrunk wrapped for strain relief. A Pazon ignition system is installed, with new 6 volt coils and a new key switch. A new halogen light bulb has been fitted to the headlight.  The horn and headlight are operated by relays made for me by Eastern Beaver Co. unseen under the tank. Tail light is LED type bulb, made for positive ground electrical systems.  The system uses real motorcycle duty relays. These take the amperage strain off the handle bar switches and provide a direct fused link to the battery. The horn is loud and the light is bright.  The wire color codes on this system are correct for positive ground.


New fork leg stanchions with new leak proof seals, new phenolic dampener seals, and good BSA gators installed.  Progressively wound springs.  New aluminum fork caps have been fitted.  Black plastic pipe has been cut, fitted, and polished and put on the upper fork tubes between the triple trees to provide an easy to maintain blacked out look.  Brand new handlebars, all the hardware has been renewed for handlebar mounting.  

Frame has been powder coated, as well as the side covers and chain guard.  All wheel bearings have been renewed; wheel hubs have been repainted with tough urethane paint.  The galvanized spokes and chrome rims, nipples are nickel plated brass - all are brand new.  Brake linings have been renewed.  All the cables are handmade nylon lined.    All the rubber items on the bike have been replaced.  

The gas tank is a European version (4 ½ gallon) that has been modified to accept the old style “Gold Star” type badges.  Ross Thomson (metal smith) did this work for me. Tank is been lined with POR15 and the petcocks are new. Custom paint work was done to create the look and feel of a blacked out hot rod and the silver insets have gold like tinge that ties together the gold hand stripe work and the gold in the badges. Now the look of a European bike and the black side covers minimize the visual gap between the seat and the fender, so prominent on these models.  

Much attention to details in the suspension and setup has led to this bike being ready to handle well. The shocks are new NJB’s. The tires used are Cheng Shin by choice; a 325/19 up front, and a 400/18 rear.  They are copies of the K81 Dunlop pattern. The front brake works just great new liners and the cable see to that.