- Used to measure the outside diameter of cam drive gears
- Made in the USA
- There are two basic differences between '90-'99 cam gear sizes and earlier years. The overall range of gear pin measurements (from the largest gears to the smallest) was reduced in '90 from .006" to .003". The large gears are the same size for both '84-'89 and '90-'99 (green and black color codes). Gear size measurements (over pins) are listed in the '90 H-D manual using .108" pins instead of .105" pins (as for earlier years). For the same gear, measurement over .108" pins will be approximately .012" larger than for .105" pins. For '92 engines, stock cam gears are interchangeable with earlier versions but gear outer diameters have been reduced by .025".