Dyna Pulley Question

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Dec 11, 2013 | 03:07 PM

Romprunner714

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From: Yorba Linda

Dyna Pulley Question

I tried to find my answer on search but could not find an answer.

I want a lot more low end power on my 07 fxdb. Whats the highest Tooth Count rear pulley that would fit my bike?

(Changing the front pulley is out of my league and out of my budget to get done at a shop.)

I believe stock rear is 66. Is there a 75 tooth? would i still be able to hit 100mph after doing this? Thanks

Dec 11, 2013 | 03:11 PM

rooti

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From: New Braunfels, Texas

Here is a post you want to read through:
https://www.hdforums.com/forum/dyna-...y-install.html

Dec 11, 2013 | 03:14 PM

02fx4dude

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From: Wisconsin

Pulley from an 06 Dyna is 70 tooth and will fit, but requires replacing the belt, which requires pulling the primary, then you might as well do the front pulley as long as you have it apart.

Dec 11, 2013 | 05:30 PM

Guest

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Quote:

Originally Posted by 02fx4dude

Pulley from an 06 Dyna is 70 tooth and will fit, but requires replacing the belt, which requires pulling the primary, then you might as well do the front pulley as long as you have it apart.

man, that fender really does change the whole look of the dyna, genius!

Dec 11, 2013 | 08:14 PM

8541hog

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From: Ogden, UT

Quote:

Originally Posted by 02fx4dude

Pulley from an 06 Dyna is 70 tooth and will fit, but requires replacing the belt, which requires pulling the primary, then you might as well do the front pulley as long as you have it apart.

This is correct. For reference a 2 tooth rear pulley change is roughly equivalent to a 1 tooth front pulley change.

You won't get much at all changing the rear without changing the belt.

Dec 12, 2013 | 06:00 AM

02fx4dude

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From: Wisconsin

Quote:

Originally Posted by IllusionBlue

man, that fender really does change the whole look of the dyna, genius!

Thanks.

Genius! LOL, can't take credit for the idea.

Dec 12, 2013 | 12:09 PM

nevil

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From: southeast PA

Quote:

Originally Posted by Romprunner714

I believe stock rear is 66. Is there a 75 tooth? would i still be able to hit 100mph after doing this? Thanks

Just remember that whichever way you go to change your final drive ratio you will have to figure out what 100 mph really is, since your speedo reading will be off. I know you're trying to figure out what to do but it will affect the speed that the gauge is telling you.

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Dec 12, 2013 | 02:20 PM

HD Pilot

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From: N Texas

You should get away with a 2 tooth change to your rear pulley without changing your belt. May not be a big enough change for you, only ~ 3%.

2006 International Dyna Pulley = 68T

#40535-06 Black
#40537-06 Silver