The J1 uses a 690cc engine from a KTM Duke as its donor powerplant. That engine was designed to be cooled in a very different vehicle with very different packaging constraints. The challenge was to design a custom cooling system that worked within the J1's unique geometry while maintaining equivalent thermal performance to the original.

Working in Solidworks, Matt designed the complete cooling system layout, including radiators, hoses and expansion tank, within the tight packaging constraints of the J1's custom chassis. A key requirement was matching the equivalent coolant system length of the donor KTM to maintain consistent thermal behaviour. The resulting CAD files were used directly to produce the prototype parts for the homologation build.

The cooling system was delivered within the six week brief and integrated successfully into the homologation prototype. That vehicle went on to debut at the Bike Shed custom motorcycle show in 2023, top Bike EXIF's annual chart and generate coverage across the global motoring press. Not bad for a scooter…