I think the Lifian engines are CDI, so the stock 90 harness would not work as they are for points. I dont think the hi-low fits on the lifian engine either, but not 100 percent on that. Have you tried getting the engine warm and changing the oil? After that, I would try to adjust the clutch engagement. Do a search on clutch adjustment, or read the service manual. It may just be the clutch discs sticking from sitting too long? Also make sure the chain is in good shape. --- Jon.
THE 80's RAGE! Currently owns:
81, 85 Yamaha Tri Moto 125
83 Yamaha Tri Moto 200 x2
82,83 Yamaha Tri Moto 175 project
85 Yamaha Tri Z 250
84 Kawasaki Tecate 250
84 Honda ATC 70
85 Honda ATC 350X
84 Honda ATC 250R
(2) 84 Honda ATC 200x
82, 83 Honda ATC 185s
81 ATC 200
Lots of other parts and bikes