I just read an article in SnowTech magazine on this subject. They say that reed are more beneficial to larger engines than smaller ones. Also, you'll get more out of the reeds if other mods have been done. According to the article, they would not put reeds in a stock or next to stock sled that is a 500 or smaller. Yet on a 700 or 800 they seem to consider it a given. I do not have V-Force reeds on my '00 XC700, but my next one will.