I've had a spare BSA 650 engine for one of my bikes for many years and finally decided to do something with it. I bought an 1970 A65 BSA Firebird frame from a salvage yard. I acquired a blown up Kawasaki 650 for the forks and front brakes, and a Suzuki mono shock swing arm and shock with linkage. The swing arm actually attached to the same pivot points in the BSA frame with machined thrust bushings to adjust the side to side play. The BSA frame steering head was modified with machined adapters to fit where the original ball bearing races were and accept the tapered bearings of the Kawa 650 forks and to set the top to bottom spacing. Since the Mono Shock fit in the space where the BSA Wet Sump Oil Tank fit, I added two one quart Automotive Red anodized oil catch tanks with a BMW 100 oil cooler, in line filter and a computer 12 Volt cooling fan. Engine was rebuilt with .40 over piston and rings, new main and rod bearing, new 200 Watt Stater and Harley Solid State Regulator/rectifier. New Kehin PWK Carbs were used. Sorry for the poor quality of the early build pictures. Later pics are better.
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