Found by Sake Racer on Flickr, simple, neat and effective build.
Yamaha
Always worth a revisit.
Confusingly, the second bike tagged #1, Left Hand Cycles XS based “Acid King”. You like?
Classic Yams - “After the introduction of the XT500 Yamaha’s Swedish Distributor, Hallman & Eneqvist, came with the idea of building a 4-stroke Motocrosser – the HL500
The concept was worked out initially by Bengt Aberg, former World Champion himself like his Boss, Torsten Hallman, multiple World Champion and Torsten’s partner Staffan Eneqvist, who had been in the World Championship winning Swedish team for the Trophy of de Nations. (Some people with experience………)”
