Well after mounting my new Vortex rear sprocket, I can honestly say, "OMG"! It feels MUCH stronger under hard acceleration! I have lost a little top end but thats OK.. It's not like I hit 190 MPH everyday anyways! The only problem I am having is keeping the front end down in first AND second gear.. Everything after 3rd gear is fine.. I am at a cross road in my bikes use. Do I slam it and stretch out the rear swing arm only to achieve a 6.1 or 6.2 time slip or just keep it the way it is, and tear up the twisties! Well, as BAD as I want the bike to be on the drag strip, it is NOT practical for me to dump $700 - $800 dollars into the bike for only .8 or .9 second faster. I would rather use that money to buy EXTRA body work or maybe a little engine work. Besides, I rode 400 miles yesterday, hitting the local twisties with a group of about 40 other riders! That feeling is just about priceless..