Author Topic: Dyna S conversion on a Bridgestone 175  (Read 677 times)

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Offline billdok

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Dyna S conversion on a Bridgestone 175
« on: March 26, 2018, 09:18:12 PM »
I was very impressed with the dyna s conversion that Old Swartout executed. I am new to the Bridgestone world and I am not sure I know the difference between a half speed and engine speed alternator. My 175 has an idler gear - does that make it a half speed. My second question is - does the dyna S rotor for the GL1000 come with 2 magnets as referenced in Old Swarouts pictures and write up?

Offline OldSwartout

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Re: Dyna S conversion on a Bridgestone 175
« Reply #1 on: March 27, 2018, 03:48:01 AM »
With an idler gear, your alternator is the "full-speed" design.  You can use most any of the Dyna S systems with two triggers opposite each other.  The KZ1000 or Suzuki systems seem to be the most popular used on Ebay.  Buying new, just go for any with two trigger units opposite each other, you probably won't use the backing plate anyway.  Here's a write up on the 350 conversion which would be the same as a 175: http://bridgestonemotorcycleparts.com/index.php?topic=3645.0

In another thread, a user also mentioned using a Pazon (New Zealand) ignition which appears to be a pretty simple installation, too. I don't know which model he used.
Karl Swartout
Mooresville, IN
BS175 Roadracer
BS350 GTR

Offline billdok

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Re: Dyna S conversion on a Bridgestone 175
« Reply #2 on: March 27, 2018, 05:49:21 PM »
Thank you for the quick response. I am going to move forward on this and will post my results when finished. Again thank you very much.

Offline billdok

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Re: Dyna S conversion on a Bridgestone 175
« Reply #3 on: March 27, 2018, 06:00:48 PM »
One quick question just to make sure I have not misinterpreted your instructions, the KZ1000 system is a single magnet rotor with 2 pickups. Based on your comments, a single magnet rotor will work correctly on the 175. Again thanks for your help.

Offline OldSwartout

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Re: Dyna S conversion on a Bridgestone 175
« Reply #4 on: March 28, 2018, 08:06:02 AM »
Correct on the single magnet rotor for the later 175's and 200's and the 350.  The early 175's with the half-speed alternator needed the two magnet rotor.
Karl Swartout
Mooresville, IN
BS175 Roadracer
BS350 GTR

Offline billdok

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Re: Dyna S conversion on a Bridgestone 175
« Reply #5 on: March 28, 2018, 08:28:21 AM »
That clears it up. Thanks.

Offline jjwithers

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Re: Dyna S conversion on a Bridgestone 175
« Reply #6 on: March 29, 2018, 02:35:18 AM »
I have that KZ1000 set up on my 175HS and so far, so good.
1967 175 HS
and some BMW's from the 60's and 70's

 


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