JIMS 96385-78A Shift Fork Gauge, Big Twin 4-Speed, Late 1979-1986, Plate-Type Shifters

JIMS 96385-78A Shift Fork Gauge, Big Twin 4-Speed, Late 1979-1986, Plate-Type Shifters

• JIMS 96385-78A is a shift fork gauge for Harley-Davidson Big Twin 4-speed transmissions. It lets technicians check and set shifter fork position so the shifter clutch and gear dogs engage correctly, helping prevent missed shifts and premature wear.
• Features:
  • Purpose-built gauge checks and aligns Big Twin 4-speed shift forks for proper clutch and dog engagement, improving shift quality and gearbox life
  • Engineered for plate-type shifter mechanisms used on late 1979-1986 Big Twin models for model-correct setup
  • Rigid, shop-grade construction maintains dimensional accuracy during repeated service procedures
  • Simple, repeatable setup reduces guesswork during transmission assembly and fork replacement
• Specifications:
  • Manufacturer: JIMS
  • Part Number: 96385-78A
  • Product Type: Shift fork alignment gauge
  • Compatible Systems / Fitment: Harley-Davidson Big Twin 4-speed, late 1979-1986; plate-type shifters
  • Function: Sets and verifies shifter fork position to ensure correct shifter clutch and gear dog engagement
  • Alternate / Cross References: DS-196162; replaces HD 96385-78A in fitment references
  • Packaging: Each
• The shift fork gauge can also be referred to as Big Twin shifter fork gauge, 4-speed fork alignment tool, plate-type shifter gauge, transmission fork position gauge, and JIMS 96385-78A tool.

JIMS manufactures precision service tools and performance components for Harley-Davidson motorcycles, providing professional-grade fixtures and gauges that improve accuracy, speed, and repeatability in engine and transmission work.

Q: Which transmissions does this gauge fit?
A: It is for Harley-Davidson Big Twin 4-speed transmissions with plate-type shifters used on late 1979-1986 models.

Q: What problem does the gauge solve?
A: It sets and verifies shifter fork position so the shifter clutch and gear dogs line up correctly, reducing missed shifts and gear edge wear.

Q: Is there a different gauge for drum-type shifters?
A: Yes. JIMS specifies a separate gauge for drum-type applications; use 96384-39 where a drum-type shifter is fitted.