Auto-Advance Mechanism, Cone Motors

For all cone motors:
1970-1999 Big Twins
1971-2003 XL Sportster
 

• The auto advance base & shaft are one piece, machined from 4140 chromoly tool steel, and ground to .0001 accuracy.
• Pivot pins are tool steel & heat treated to 58RC.
• This unit is meant to last a lifetime.