I put all of the ratios in the thread on the 850 posts.
gtwitch in wyoming
I've heard other folks say that the belt tensioner crates parasitic loss of hp.There will still be guys who order a sled with the QD2 and switch to TKI for ratios, 1/2 price belt, more belt to gear contact, less parasitic losses due to more flexible belt and less tension etc. So if you wait there will be some QD2's come up in the classifieds.
To clarify the belt with a tensioner is much looser than a QuickDrive belt so the drag is minimal.I've heard other folks say that the belt tensioner crates parasitic loss of hp.
If you think about it, two gears and a belt will take less torque to turn vs a similar system with a tensioner pressing on it.