This is the GE Series Clutch (Heavy Shoes).
Product Specs:
4 Cycle
3/4″ Bore
#35 Chain
Stock Engagement: 1950 RPM
Stock Spring: Red
Heat Treated Shoes for Increased Durability
Variable Spring Assortment Increases Flexibility in Engagement Settings
Ability to Change Settings Allows Fine Tuning to Different Track Layouts
Improved Stamped Drum Providing Stable and Consistent Runout