All last year my daughter complained she wanted more power and speed out of her zr120. Over the summer I found a 7hp Honda clone on clearance. Well the old 118cc engine has been pulled and a 211cc electric start engine has been installed. There were only a few problems with shoving the larger engine in. The steering had to be redone to get around the starter and the exhaust port on the new engine comes out of the top instead of the side so I had to weld up a new exhaust pipe. The electrical was easy, I had to run some new wire and get a new key switch. The only thing that needs to be worked on is the chain adjuster. What a POS that came on the sled. The spring can't even hold itself up let along with the chain on it. I have to get some new gears ordered for it. I have a set of CV clutches for it but I'm holding off on those for now. It is the end of December and she is waiting to ride. I hate to be haft way through the project and we finally get snow.
Dane
Steeering mod:
Dane
Steeering mod: