I have logged over 2,000 miles on my BDL 2" open primary belt drive with no problems. There are positives and negatives in changing over from primary chain drive to belt. Positives are engine spools up much quicker from idle due to lack of extra weight on crankshaft. No more compensator knocking. Gears shift with a click in lieu of a clunk even going from neutral to first. No more changing primary fluid, and best of all never to have to purchase another compensator sprocket. Negatives are that the belt drive does not eliminate as much engine pulse as the compensator thus the transmission gears rattle with the pulses under 2500 RPM. You lose the sound deadening effect from the closed primary case so nothing to absorb gear sounds. Neutral with clutch out is noisy due to 32 dry ball bearings spinning around right under your left leg. I have learned to keep engine spinning 2500 RPM and beyond to eliminate all the gear noises. Still wouldn't go back to compensator chain drive. Will check back in another 3000 miles to see if anything changes.