I have the 2004 raptor 660r with a yoshimura exhaust. I bought a new carb and am wondering what jets would be best for my setup?

 

Hopefully it's an oem carb or if an aftermarket carb the same style jets are used. Some people have noted that some Chinese carbs have different jets and threaded differently. Try first with stock jetting and see how it runs and plug chop. Just get to top speed when warmed up,kill it and stop asap. Let it cool down,pull the plug and check the color. Plug should be a tan to medium brown color if the jetting is ok. If it's whitish in color,jetting is too lean.Jetsrus offers jets if you can't find them locally along with several jets in a kit if needed.https://www.jetsrus.com/a_jet_kit_at..._2001-2005.htm