Check out at http://www.quietpowerdrive.com

I had questions about how they would hold up, then I saw the same belt/gears on a 125hp Speed triple...good enough for me!
Go price a replacement Harley front and rear gear, they run $300-$400 just for the rear sprocket! I am a CNC machinist and own my own shop, I still wouldn't try to make this for $850.
I'll have pic's on my install soon. Look for my photo album in 2 weeks.

2005 Speedmaster Staintune Exhaust Ikon 1" lowered rear shocks