| Also known as | G20D |
| Listed in parts books | Not catalogued by year yet |
SPRING CUP 6 SPRG CLUTCH
Spring cup for a six-spring clutch assembly, part number 66-3781 (also listed as G20D).
This is a spring cup for the six-spring clutch setup, part number 66-3781, also known under the older G20D designation. Its job is simple: it sits under one of the clutch springs and gives the spring a proper seat to bear against, so pressure gets applied evenly across the clutch plates instead of digging into soft metal or wandering off-center.
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Our records on this one are thin beyond the basic description, so we can't speak to specific model-year fitment here. If you're rebuilding a six-spring clutch assembly and need to know whether this cup matches what's currently in your bike, give us a call and we'll sort out fitment before you order.
These cups are easy to overlook when a clutch is coming apart for a rebuild, but a worn or missing one can throw off spring pressure across the assembly, so it's worth checking each one against a straightedge or fresh cup when you've got the clutch open.
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