Kibblewhite offers crank bushings with no steel liner...

https://shop.kpmivalvetrain.com/c/british_bsa_a65-1971-1972_bushing-crankshaft


79 T140D, 89 Honda 650NT ,61 A10 .On a bike you can out run the demons
"I don't know what the world may need
But a V8 engine is a good start for me
Think I'll drive to find a place, to be surly"