not many on a stock sled. reeds enhance throttle response when modifications are made. reeds alone gain you a VERY small percentage on HP. when coupled with other modifications, that percentage will increase.
I've done reeds on about a dozen sleds now, a major percentae of them stock. They improve throttle response and crispness greatly. I put Vforce 3's in my Mach , which is stock and it made a great difference in how snappy the throttle felt.
__________________ 1992 Ski Doo Mach 1 (SC-10/2 suspended) March '07 SF.com Sled of the Month!
1993 Ski Doo Mach Z 780 triple
2001 Ski Doo Mini Z