I'm wondering what the down side of eliminating the compensator and going to a solid sprocket would be ?

Does this make you more prone to flywheel scissoring?

I also heard about some rideability issues as a side effect.

 

The bike will be more responsive on and off the throttle almost jerky putting around town.

 

I have been running solid sprocket for the last 9900 miles, I see no down side.

 

Depends what torque you have on your bike.
With low torque values you can in principle ride with a solid sprocket. With high torque high power engines this is not recommended as the the mechanism gets a lot of beating with instant on/off torque forces. The compensator is there to make the transition between fast high torque and low torque more smoother. Eventually you will get metal fatigue at your parts which will break in time. So high power/ high torque motor => compensator, with lower end engines it's still best to have but not such a requirement for the long life. Hope it helps.

 

there is a couple local guys running S&S 124's with sprockets with no problems, thats why I tried it with my 103.

 

I would imagine their also fitted with S&S cranks , that's my biggest reservation , the stock HD crank.

 

I had to go to a belt drive primary and in doing so nobody makes a compensator for the those and you know what, it is nervous and jerky on the throttle without a compensator. If you got one stick with it don't swap it out you might not like it. I think it puts too much stress on specific components. That way it's nice to have a little cushion..... Just so you know I did shear my crank pin on my motor. I don't know if it was in relation to no compensator or not but it happened.....