I have two 2001 Sportsman 500s. One (green) I purchased last fall, the second (yellow) last week. I noticed the yellow one hesitates for just a second upon giving it gas from a stand-still, and then it sort of jerks into motion, in both forward and reverse. I can hear a clicking noise when it does this. The green one has a smooth acceleration from a stop.

Is there an adjustment on the clutch or something I could look into to see if I can get the yellow one to start off smoothly? I wonder if there’s some gunk or something holding up the clutch movement and would a shot of WD40 help?

Any thoughts?