Got about 3 of these engines. They were built in wolvohampton England (20 mins from where i live). Only problem is the output shaft being tapered and threaded (roughly 17.5mm) finding a clutch can be a problem.
This one has a modified pocket bike exhaust
[video=youtube_share;QjV3CQL8sy4]https://youtu.be/QjV3CQL8sy4[/video]
This one has a modified pocket bike exhaust
[video=youtube_share;QjV3CQL8sy4]https://youtu.be/QjV3CQL8sy4[/video]