1977 harley sportster mechanical speedometer registering wrong speed

SOURCE: Speedometer problem

your speedometer may be streached. or twisted. if this happens you will take the chance on breaking it. i would suggest you replace it.

SOURCE: sportster sport sppedometer problem

replace TSSM this module uses speed sensor to trigger cancel.

SOURCE: Sportster 883 speedometer issue

Check the grounds the are known to vibrate loose.

Rajath Johnny

• 250 Answers
• Posted on Jul 01, 2009

SOURCE: i am looking for a wiring diagram for a 1977

http://www.hdforums.com/m_71595/tm.htm

-sultan

SOURCE: Speedo has stopped working on my Honda VTR 1000

if mechanical, remove cable at front wheel spindle, pull out metal square, see if its snapped.