So I bought this chopper off eBay for $80.00. Unwanted Xmas present with very little use. Ordered a Cyclone 180watt kit direct from Taiwan. The battery mount is thin plywood, held on with cable ties, and not painted yet. The 2 x 12volt 7AHr SLA's I already had. Didn't use the Cyclone crank axle, as this bike's axle is already longer. Took it for a quick blast up the street, ran fine.
Problems at this stage:
1: the freewheel crank slides on too far, and fouls against the bearing cup. I shimmed the square taper with some heatshrink for now, just to get it going. But this will require further engineering to get it right. Possibly some very thin brass shim material.
2: The tubing where the motor is mounted will need some support tubes added through the bolt holes, to prevent crushing. The motor has already rotated, and the chain no longer runs straight over the motor cogs.
3: The rear dropouts are 170mm wide. I found a Sturmey Archer 3 speed hub specially designed for this frame, and am awaiting delivery.http://www.choppersus.com/store/product ... Disc-SLVR/
Original weight 21Kg. Weight now 29Kg.
The intended use is the 6Km trip to work, which is a little bit hilly.