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General Category => General Discussion => Topic started by: guzzifan on February 06, 2015, 12:40:25 AM

Title: 14 amp charging system to 20 amp conversion
Post by: guzzifan on February 06, 2015, 12:40:25 AM

I have a 14 amp system on my 850-T but have collected all the parts for a 20 amp system.  I notice a few more wires are required for the conversion (more electrical terminals on the 20 amp than 14 amp layout).  Can anyone give me a rundown on what wires I need to add and where they go?  Thanks.

Title: Re: 14 amp charging system to 20 amp conversion
Post by: rodekyll on February 06, 2015, 01:25:31 AM

If you're looking at the connector at the "Y" terminal on the alternator stator -- that one doesn't go anywhere.  It's the common point of the three stator coils.  If there is a difference at the regulator you'll have to wait for more answers -- I don't remember there being any different, but I'm old and forgetful.

Installation tip -- install the stator with the brushes in the ~10:00 position.  Urban legend has it that the brushes don't bounce so much at that angle and so the charging is better.

Title: Re: 14 amp charging system to 20 amp conversion
Post by: Antietam Classic Cycle on February 06, 2015, 09:15:28 AM

You can buy a complete new ready-to-install charging system harness from Greg Bender for $56.16.

(http://www.thisoldtractor.com/for_sale/wiring_subharness_tonti_17747450_1.jpg)

http://www.thisoldtractor.com/for_sale_wiring_harness_tonti.html