Adjusting clutch pack height for slipper clutch

[ZeePopo]

Question, so I have a STM slipper clutch that calls for 50.2 mm stack height +/- .2 mm. Currently I'm at 50.14. How do I figure out what to change to get it in spec? Seems to require quite a narrow range to work optimally. After the next track day I'm pretty sure I'll be close to 50mm.

 

[Berlin Germany]

my thought at this isssue is:

the minimum thickness of the entire clutch pack at the gen1 standard clutch is 50.5 mm
lower / thinner and the clutch slips

to fix that issue get 1 thicker steel and 1 thicker friction disc as i wrote here - maybe that helps.

 

[ZeePopo]

my thought at this isssue is:

the minimum thickness of the entire clutch pack at the gen1 standard clutch is 50.5 mm
lower / thinner and the clutch slips

to fix that issue get 1 thicker steel and 1 thicker friction disc as i wrote here - maybe that helps.

Do the steels and frictions disc interchange from Gen 1 to Gen 2? I have a Gen 2

 

[Dennis]

Do the steels and frictions disc interchange from Gen 1 to Gen 2? I have a Gen 2

They interchange, but really from what I've seen the difference is in the face width of the friction material. The difference between the thick and thin steels is something around 0.2 mm (from memory, close but not exact) so you can mix and match used fibers and thick/thin steels to get your stack height. This is pretty common in the drag race world. Most guys have a big stack of used stuff and do the mix/match as often as after every pass.

 

[ColdBusa]

^ what Dennis said. Currently in my stack I've got a mishmash of Gen 1/Gen 2 steels/fibers.