Just one quick note on "loose" belts.
When the cogs of the belt are fully engaged into the sprocket, as in running on the "tight" side, you get just a straight pull on the belt and it does what it's supposed to do.
But when a belt is allowed to run looser, the cogs can ride up the sprocket flights and as they come up and the round of the belt cog gets close to the top of the sprocket tooth, it works like a lever and can actually put a LOT more stretch pressure on the belt. This has been proven over the years on Harleys with broken belts.
As all here know, the correct tension of a belt is very subjective and finding the sweet spot is not too easy.
A rule of thumb on the Harleys is that if you can grab the belt in the middle bottom and with your fingers twist it 90 degrees, its about the right tension. If the belt is too loose you can twist it past 90 and of course if it's too tight, you cannot get 90 out of it.
I would just tread lightly about running belts "loose" versus a bit more on the tighter side.
Just my opinion, but wanted to throw it out there for more information.
When the overlay sprocket information hit my computer some time back, I did a quick review of the site and it looked promising and I too will be very interested in knowing how well it works.
But after riding belt driven Harleys now for some time, I can say that belt wear, pulley wear and belt noise never comes up as a problem or even an annoyance in person or on any of the forums I participate in. Just say'n!
