This 2005 Yamaha raptor would not rev up. I thought for sure it was the carburetor because it kept falling on its face when you hit the throttle.
I read several threads about the CDI box issues. DO NOT BUY A CDI BIX ON AMAZON! I first found a broken connector and thought that was the problem and realized I did not have the green and yellow wire that was for the reverse cut out. I ordered a replacement CDI box for $36 on Amazon which was made in China and when I installed it it did not even start correctly at all. The starter and spark were different. I also suspected the coil for the spark plug and replace that as well.
Replacing the CDI box and ignition coil did not fix the problem. After looking closer I found the black wire on the eight pin connector to the CDI box was separated. I also realized someone had already cut all of the Warriors on these connectors and re-connected them. I spliced and forced the black wire into its original eight pin connection location and the four wheeler started up but it still had issues. I then added a ground from the Green and white wire on the four pin connector. With these two corrections the Yamaha raptor 660 R is now able to throttle and I’m planning to test drive it today.
I was unable to find anyone that sells for eight pin connector or the four pin connector for the CDI boxes and I do not want to buy an entire wiring harness. Let me know if anyone knows someone that sells connector