If you do not want to shell out of money for aftermarket reeds, just replace em with OEM. I would go with the Wolfpack reeds(or another company), instead of the V-Force reeds, they're slightly cheaper. Doo's come with very large reed cages from the factory, and i have not seen any gain using aftermarket reeds on doo twins. don't expect a really big dif from reeds, except for throttle response. My freind has a set of Wolfpack reeds in his 700 Summit, and he says that didn't make a bit of difference. two guys here are running V-Force in their sleds(an 800 Summit, and a 600 drag sled) and they did not notice any improvement over stock reeds, if anything it messed up their top end perf.