It's an old photo currently Racing a 09 R6 in West Aus
Quick church of the rule book and no Stm's allowed
OEM it is then.. What's the slipper spring Mod?
sweet, the b&w gives the pic a retro look .
I am betting this has been discussed before, check for some older threads..
if you look at the exploded view of the 3rd gen clutch, there are three "Y" springs stacked on top of each other that regulate the slip as it ramps. Lessening the force (less spring pressure) lets the clutch slip a bunch more. So, this can be done in any degree you feel you like. From all 3 springs (stock) to cutting the fingers off 2 of the "Y" springs and only having 1 (lots of slip).. the springs are only about $10 per, so if you cut em and wanna go back some, it's not a big deal.
Some cut 6mm off the middle spring fingers, then 12mm off the top spring.
I run 2 full, and 12mm off the top one.
Keep in mind you should run the remnants of the springs (basically a washer at that point) so the washers push the bottom spring all the way down. The clutch hub nut has a collar on it that goes inside the "Y" springs, this is why you need to keep all 3 parts even if the fingers of the "Y" are cut off..
Keep in mind you can ALSO affect clutch slip by using a thinner clutch plates, or reducing clutch spring pressure (softer springs but these are YEC kit parts/$$$) .
just some fyi for those doin this:
BE CAREFUL to ensure the washer collar is inside the springs before you tighten it or it will smash the springs..
be careful too, that you stack them properly as each spring has a locating tab. these have to alternate and go into a groove of the clutch hub. Those tabs are easily broken off if the install is done wrong. There is a recent thread where a guy (who i had a couple dozen emails back and forth helping out To view links or images in this forum your post count must be 5 or greater. You currently have 0 posts.
) had a new clutch, all in spec, assembled correctly.. but.. one of these little locating tabs had broke off, floated around, and was wedged in a spot that didn't allow the clutch pack to engage properly and it would slip even at mid rpms ..
be sure to peen the lock nut onto the shaft so it won't back off after it's torqued down.