Husqvarna 50 Workshop Manual page 25

To separate the clutch shoes and spring from the clutch
hub first secure the clutch hub in a suitable vise. Pry one
shoe out far enough to remove the spring.
Check the clutch shoes for wear by measuring the
material thickness at the shoes thinnest point. If the shoe
is worn to less than 1 mm (0.040 in.) of material at the
most worn part, the shoes must be exchanged.
When exchanging clutch shoes, always exchange all
shoes at the same time.
Inspect the clutch hub spokes for wear, Excessive wear
causes a jarring sound and poor clutch operation.
NOTE !