Honda CB125 Episode: 10
Looks semi home built (a modified street bike), the engine is too small to be BSA/Triumph/AMC and is wrong shape for Ducati so that leaves Honda, maybe based on a CB100 (fork shrouds). Plenty of shots of the bike, but nothing identifiable (to me, at least!) I'm more or less convinced it's a little Honda 100-125, something originally a CB/CL/SL (CT's of that era were Cub based), a reasonable shot of the exhaust would help. Only decent shots of the exhaust: Painted-over Honda logo on the tank?
The silencer outlet possibly matches the position for an SL 125, the rest of the bike doesn't I think this is a CB100 or 125 modified as a farm/green lane hack.