I am currently helping a friend work on his sons raptor and we are having the problem with the idle surging (rev up and down) while the bike is in natural. When you put the bike in gear the surging stops. I have already rebuilt the carb. I have read multiple threads with people asking a similar question but I am having a hard time finding an answer or solution to the problem. I am also in need of a few more things. I need the stock carb settings. I am in need of information on how to adjust the timing chain tension.

 

i am also i need of a service manual.

 

I had same issue I deleted the reverse limiter wire and parking brake still had it then changed my CDI and it was fixed