1979 CT90 wiring - Honda Trail - CT90 & CT110 Forum The place where fans of the Honda Trail CT-90's & CT-110's help each other. FORUMS. Next; 1979 CT90 wiring 1979 CT90 wiring. Haysie. 11. Haysie. 11. Post Feb 24, 2019 #1 2019-02-25T04:12. Well I have spent two days looking at and Engine Stop Switch and then there is the Br which runs to the Tail & Stoplight Edit: I had posted what was Lifan 125 into ct90- how to? Muffler - Honda Trail - CT90 Hello, I have a 1970 honda trail ct90 k2 with a bad engine. I want to install a lifan 125 semi automatic. Some questions? I want to simplify wiring, can I wire it without a battery, if so is there a wiring diagram? CT90 Resto-Mod | lilHonda I have built a 126cc honda motor from an ATC125M crank, ATC110 cylinder and an ATC125M piston. I had to machine the crank to fit the CT90 cases and the dome of the piston so they wouldn't hit the valves. Finding a cam chain that was the correct length was the most difficult part.