I spotted this Maico Letta at Stafford Show, I saw the front disc brake, then noticed the louvered front panel that lets air into a small radiator mounted inside the glove box with electrically operated fans for the water cooled single cylinder four stroke engine iirc the engine has 5 valves in the cylinder head. I've forgotten the make of the engine he fitted - it's based on a rotax type engine he said.
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PXL_20241013_104259538 by
Macabe Thiele, on Flickr