What is the main purpose of this jackshaft bolt?

This bolt allows you to install a later style starter (1994-2006) on Big Twin models that originally came with an earlier starter (1989-1993), excluding the 2006 Dyna. It bridges the compatibility gap between different starter generations.

What are the specific thread sizes on this bolt?

The bolt has a 1/4 inch shank and a stepped-down 10/32 thread. This specific sizing is what enables the connection between the different starter types.

Does this bolt come with any hardware?

This product is a single jackshaft bolt. Any additional washers or nuts needed for the starter installation would typically be sourced separately.

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Est. 1957

Twin Power 89-06 Big Twin w 10-32 Starter Exc 06 Dyna 1/4 Inch Jackshaft with 10-32 Thread

Specifications

Brand: TwinPower
Part #: 413208
UPC: 887337164687

Twin Power 89-06 Big Twin w 10-32 Starter Exc 06 Dyna 1/4 Inch Jackshaft with 10-32 Thread

Name: Twin Power 89-06 Big Twin w 10-32 Starter Exc 06 Dyna 1/4 Inch Jackshaft with 10-32 Thread
Brand: TwinPower
Price: 9.20 USD
Availability: InStock

$9.20

In Stock

Twin Power 89-06 Big Twin w 10-32 Starter Exc 06 Dyna 1/4 Inch Jackshaft with 10-32 Thread. Allows late style starters to fit earlier models.

Key Features

Fits 1989-2006 Harley-Davidson Big Twin models, excluding 2006 Dyna.
Allows late style starters (1994-2006) to be used in place of earlier starters (1989-1993).
Features a 1/4 inch shank with a stepped-down 10/32 thread.
Made in USA.

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Will this fit your vehicle?

Product Details

Twin Power is known for making reliable parts for Harley-Davidson motorcycles. This jackshaft bolt is a good example of how they help you get the right fitment. It's designed to let you use a later style starter, from 1994 through 2006, in place of an earlier starter on your Big Twin, with the exception of the 2006 Dyna models. This is a common need when rebuilding or upgrading the starter system on these bikes.

The bolt itself has a 1/4 inch shank and a stepped-down 10/32 thread, which is key to making the connection work. It’s made in the USA, so you know it’s well-built. This part is essential for ensuring your starter engages correctly and your bike fires up reliably, especially when you're mixing and matching starter components across different model years.