i installed the clutch springs last week, and the bike definitely pulls a bit more and holds its speed better at higher speeds.
for example, i have stock gearing, and in 5th, riding thru from 6k to 10k rpm's, it pulls harder. i know 13HP won't rip your arms off,... but you can feel the bike's willingness to rev and the bike just zips along !
i have more confidence riding between 100 and 130 now because i know i can maintain those speeds easily.
for the price, you can't beat this useful mod.
Rating: [5 of 5 Stars!]