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-.
