What's this, by whom, powered by what - for 1 point?:
Remember - solving puzzles using 'Google Search by Image' is BANNED on AutoPuzzles!
Autocykl'1948
Rostislav Dyma
Czechoslovakia
That's right Roman.
Locked for you to answer the remaining question..
Tricar was powered by a single cylinder 500 cc 4T BSA engine, 12 HP
Yes, that's right.
So I'm pleased to award you your 50th point, which makes you an Expert.
No more answering Rookie puzzles for you but it does mean you can now post your own puzzles!
Hopefully you will.
Well done.
Thank you!!!
some technical details: