05 660. I just finished a top end rebuild. 686 kit with CP 11:1 piston and new cylinder, Mudbuster cam, K&N air filter with stock airbox, HMF exhaust, and Dynojet stage 1 kit. I put in the DJ160 main jet and also added a Mikuni 45 pilot jet. Left the valves alone.
Before all of the work it burned oil like crazy but ran ok. Now it starts ok, idles fine (maybe a tad rough?), but has hardly any power. If I mash the throttle from idle there is a very noticeable hesitation before the power comes on. After the hesitation, it accelerates fine up to 10-15 MPH or so. After that point, it’s extremely slow to accelerate and doesn’t want to go much over 20-25 MPH.
I guess where I’m getting crossed up is figuring out whether I put the carb together wrong, if I need to mess with the jetting, or it’s something else entirely. Any suggestions? I’m thinking of taking the carb off to clean and possibly rebuild. Is there anything I can try before I do that or am I on the right track?
TIA
