Most likely the tires & suspension. When I farmed in IL I was on a gravel rd. I road down 5 mi on the paved rd to where my buddy & cousin on both sides of family was plowing. I road out to the tractor on plowed ground bout a 1/4 mile. What fun. He hopped on & went out for a ride while I continued to plow for him. He came back out & said the bike shifted hard. Didn't use the clutch, no wonder. Didn't use it on his Duc either. Try that on a LM3 w/clip-ons.