Lifan Engine Swap - Honda Trail - CT90 & CT110 Forum Jan 11, 2011I've put kick start only 110cc Lifan manual clutch engines in a 68 and a 71 CT90 and just last week switched the 68 to a 140cc oil cooled Lifan. It takes some mechanical knowledge, tools, and some work but the results are well worth it IMO. Do join the group in the link that Allen posted, there are examples, wiring diagrams, etc., there. Honda CT90 with Lifan 12 Volt Engine Wiring Diagram - Home Honda CT90 with Lifan 12 Volt Engine Wiring Diagram $ 4. This is Jon’s full color zoomable high resolution diagram. Printable. Includes wiring for kill switch relay, 12 Volt regulator, and CDI. A must have for clone engine installations and custom builders.