I have a 2007 trail boss 330. The CDI failed. I bought a cdi off of a 2005 polaris sportsman 500. The plugs were different, the 07 was a 8 pin connector with 6 wires and the 05 has a 6 pin with 6 wires. I compared both wire schematics and got the 05 cdi to work.

The problem is, it starts and idles fine with the 05 cdi but when you go full throttle it has no power. It cant climb a hill and it tops out at 25 mph. Other then driving like its a 50 cc quad, it runs great. What is the reason the the cdi doesn’t work? I know the power curve is different but I thought it might operate better.