They carry both a front and rear pulley. I think each changes your overall gear ratio about 5% each or 10% for both(more mph per rpm). Have not done the change but from what I read the front is a bit easier to change. The rear change out requires removal of rear wheel. I made a similar change to my wifes Yamaha Vstar chain drive. I have seen some posts that the change moves your tire a bit closer forward but I doubt one pulley change would be enough to notice. Belt tension will of course need to be readjusted after change. I think it partially fixes the speedometer error. My 2009 900LT speedo is about 6-7% off so been looking at doing just the front.
Southern Crusiers, Chapter #6
2009 Vulcan 900 LT Red/Titanium
Kury Iso Grips and Throttle Lock
Cobra Guard w/Kury Foot Rests
Kawa Windshield Lowers
Cobra Luggage Rack
Wolo BadBoy Horn
Last edited by TNCarters; 11-10-2009 at 06:45 AM.