justin1620
Member
hey fellas I would like to get my engagement rpms up a bit to around 3800-4000 rpm and was wondering what the easiest, cheapest way to go about doing this. It engages at around 3400-3500 rpm. I just bought a 99 srx 700 so I am kinda new to this and learning new stuff everyday from this site so bear with me please. I checked out the clutch and found the primary to have an all yellow colored spring..not sure if it is stock or not, stamped 8bw, 8dn-10 weights. The secondary has a hauck magnum roller, tushima (stock?) 38bv helix, and a black spring with a silver mark on it so i am assuming it is hauck's silver spring. It maxes out at around 85-8600 rpm. What would be the simplest way to bring up my engagement rpm without swapping everything out, sled runs hard just want a higher engagement rpm....any advice would be appreciated
Change primary spring is what ya need.
Yamaha never had an all Yellow spring[to my knowledge anyway]. If you could determine the rate of that spring you could then find a spring with the same final spring pressure[to keep your rpms where they are at full throttle] but with a higher initial spring pressure[to give a higher engagement RPM]. It takes a bit of trial + error but hopefully you will hit the right spring pretty quick...in fact someone on the forum will probably tell you exactly the right spring.
kirk700 srx
Member
You can also get a couple engagement shims, they go between the spring and the spider! do not use any more than 3! Someone on here will know the part number
justin1620
Member
thanks. I will try to find out what spring or how many shims to use. I called Hauck they told me to use their black spring. Is it correct that one shim will increase engagement by 100rpm?