Home built BSA B31 -47

Daniel Andersson, Borlänge, Sweden

The Story So Far… This was an idea I got 4-5 years ago. And then I also got the Polycarbonate sheet from a friend who has a glass/window repair shop! The other projects came in the way ( a Triton with Featherbed frame with a modern Triumph Speedmaster motor, a Norton chopper, a Suzuki chopper and the last build a Norton 961 motor in my own chassis). But after the last Norton project had been shown at a lot of places, I ran into a BSA motor, and I saw the picture inside of my head 😊 Now it’s time to go for the BSA glass wheel chopper! I bought the motor and put it in my frame jig, which now was empty 😊 Started to draw up a 1:1 drawing (like I always do) and I could after a short while clearly see that this will be fun 😊 I didn’t want to get any ”rules” in the way for my curiosity, how it was even doable. I just started to bend the tubes, and it continued with the fork in another jig, in the jig… so to say. (I wanted to du the frame and fork I one sweep, therefor it was important to do it all in the jig at the same time) I started to draw the wheels and how it should be done in Solid Works. (Took some hours to get the idea and make it doable!) The hubs are made in 2 pieces and bolted together the Polycarbonate sheet. So is the rim: One laser cut piece is welded onto the rim, and the other is bolted on the outer side of the plastic. (M4 pin screws with nuts) I didn’t want the frame to be wide, and I decided that 17cm is maximum. And so is the tanks and front fork! Because of that, I had to place the rear sprocket on the outside of the frame – The rear wheel bearings are mounted in the frame. And I needed a intermediate gear to keep the motor in centre of the frame. I finally got it on ground and I could see that this would be something special 😊 I contacted a Guy called Bosse Jensen (living legend in custom painting!) I asked if he would like to paint it for me. He saw some pictures and he said Yes of course! It woI wanted it blue – Like the sew on the west coast of Sweden (Where I come from) and a big wave! It blewed my mind when he came to me with the finished result! It was awesome! First show was in beginning of march. Moon Bike Show in Avesta, Sweden. It got a lot of positive reasons and I won the price – Best in Show! Original Year, Make & Model: Home built BSA B31 -47 Engine: Make: BSA Model: B31 Head(s): Stock Barrel(s): Stock Clutch: New Triumph, for BSA shaft Primary Drive: Chain! Gearbox: BSA -54 Ignition: Lucas magneto Exhaust: Open! Frame: Original Year, Make & Model: Made by Daniel Front End: Wheel: Dunlop rims customized and welded by Daniel. Hubs by Daniel. Polycarbonate 10mm thick. Caliper(s): Nope. Forks: Rigid, by Daniel Yokes: Integrated with fork. Brake Lines: —- Handlebars: Integrated with fork. Master Cylinders: ………………………………………………………………………………………………………… Controls: Handles with internal throttle and clutch, from Tolle Engineering. Tyre: 21″ Avon Grips: Aluminium made by Daniel Rear End: Mudguard Struts/Sissybar: Mud guard from Coopersmithing, USA Swinging Arm: Rigid Wheel: Dunlop rims customized and welded by Daniel. Hubs by Daniel. Polycarbonate 10mm thick. Disc: By Daniel Caliper: Tolle Engineering. Master Cylinder: Tolle Engineering Chain & Sprockets/Belt & Pulleys: Tolle Engineering Tyre: 18″ Avon Bodywork: Petrol Tank: Made by Daniel Seat: Made by Mooneyes Sweden/Daniel Tailpiece/Rear ’Guard: Coopersmithing, USA Oil tank: Daniel Electrics: Headlight(s): Bates (Modified by Daniel Tail Light(s): .LED in the rear frame tubes. Paint: Colour(s): …………………………………………………………………………………………………………………. Who Did It? Daniel Andersson , Sweden Paint job: Bosse Jensen (Jensenpaint) Royal blue candy on silver base, and a lot of flake and clear coat. Motive: Swedish west coast sea! Powder-coating: What Parts?: Motor housing, cylinder and head. Gearbox housing. Who Did Them?: Local Powder coating shop. Polishing/Plating: What Parts & By Who?: Local friend and Daniel Engineering: What Parts? Almost all parts. Frame, fork, tanks, controls etc. Who Did Them? made by Daniel