Going with everyone's advice, I installed the SE Big Twin Compensator. BIG IMPROVEMENT!!!. After the install, I drove about a mile, everything felt OK and then two days later headed out on a 3000 mile, 10 day trip. We hit nothing but twisty roads in NY, CN, MA, VT, PA, OH, WV, VA, MD, & NJ and the bike, especially the drive train performed perfectly. If you are on the fence about making this change, I highly recommend it.
1) Consistant smooth starts
2) Quiet Primary
3) Shifts much smoother
4) Nice and easy into neutral
5) No more banging in the primary
Oh yea, the inner primary had to be removed to install this, poor design IMO, but not a big deal.
Photo shows SE springs on left, stock springs inside rotor.
Tom P.