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Display Mesage #92358


Desirous Of Clutch Spring Measurements
Written by ascterransin on 4/18/2010 at 02:57 am

Seth,

I picked up my stock clutch springs today and just measured them. They all did
appear to be 38mm long. Geez the service limit of 36.5mm, 1.5mm difference, is
only about the width of the flattened spring end.

The diameter appears to 18mm or using the coin measurement system, falls exactly
between the diameter of a penny and a dime. I'd peg it closer to the dime
(officially 17.91mm vs the penny at 19.05mm).

Unfortunately I couldn't contrive of a compression measurement as requested. I
tried several different systems but nobody else recognizes the STFU measurement
unit yet (Steve's Thumb & Forefinger Unit- and you thought it was what?) and now
the dogs are all hiding from me and I have a gallon of spilled milk in the
stairway.

My friction disks haven't come in yet so I haven't have the chance to see what
my worn springs measured up to or if they equal the 5 STF of compression the new
ones do.

Steve Johnsen
Matchbook Cover Engineering Park, VA
'94 PC800 "Baiku"

Message Thread for message #92358

unlikelylogi...
4/15/2010, 02:38 am
Desirous Of Clutch Spring Measurements
Winglet's clutch is just starting to slip under heavy load, so I'm contemplating replacing the friction disks and springs. The Service Manual provides the free length for the springs (38.0mm, 1.50in) and the service limit (36.5mm, 1.44in).

    ascterransin
    4/16/2010, 03:55 am
    Desirous Of Clutch Spring Measurements
    I'm picking up a new set of stock springs on Saturday if nobody else comes up with one. I'm hoping to do my clutch then if the darn friction disks come in and can compare old vs new. My clutch has slipped under heavy load since I bought it us

      troy.ohio_pc800
      4/16/2010, 09:13 am
      Desirous Of Clutch Spring Measurements
      Steve, When I rebuilt my clutch at around 80k miles, I fitted new (standard) springs although the old ones had the exact same free length dimension. I figured why take a chance after going to all that trouble.

        ascterransin
        4/18/2010, 02:57 am
        Desirous Of Clutch Spring Measurements
        Seth, I picked up my stock clutch springs today and just measured them. They all did appear to be 38mm long. Geez the service limit of 36.5mm, 1.5mm difference, is only about the width of the flattened spring end. The diameter appe