From the AMP site:
FEATURES
• Reduces clutch pull effort by 50%
• Hardened steel gears rotate on sealed bearings
• Outer case machined from aircraft-quality aluminum
• Available in high-quality chrome or black finish
• Simple bolt-on installation to the underside of the stock lever perch
• Built-in adjuster for altering the clutch lever’s reach
• Made in USA – AMP Research products are designed, engineered and exclusively manufactured by AMP Research in America.
The only thing I can see is:
A - A bearing going bad or dirty
B - Gears a little dirty
C - Clutch cable starting to seperate.
Have been known to be wrong but sometimes I get lucky. Hope this helps
