YamahaEnduro.com  
 



Original YamahaEnduro.com forum (From 2006) 13,185 archived posts


Go Back   YamahaEnduro.com > General Discussion > Maintenance & Repair
Register FAQ Calendar Mark Forums Read

Maintenance & Repair For specific technical questions and help requests

Reply
 
Thread Tools Display Modes
Old 10-11-2017, 11:11 AM   #1
Middlezg
 
Join Date: Oct 2017
Location: Louisiana
Posts: 5
Middlezg May possibly Own a  Yamaha Enduro?


Default AT2 Regulator/battery charging questions

First Post:

I've got an 1972 AT2 with some charging issues. Got new brushes to get that out of the way. Does anyone have a guide to testing the the regulator and the generator? I'm basically able to run 4+ hours on a full battery. im reading 12.5v on the battery when the bike is off and 12.0-12.1 when its running. I have a muti-meter and a feeler gauge so I just need some tips on what to test and what to adjust.

Thanks!
Middlezg is offline   Reply With Quote
Old 10-11-2017, 12:59 PM   #2
Middlezg
 
Join Date: Oct 2017
Location: Louisiana
Posts: 5
Middlezg May possibly Own a  Yamaha Enduro?


Default

Disregard. I found a manual online for a similar year. I will start there.
Middlezg is offline   Reply With Quote
Old 10-11-2017, 08:35 PM   #3
apex
Enduro Master
 
apex's Avatar
 
Join Date: Nov 2010
Location: NoCal
Posts: 1,537
apex May possibly Own a  Yamaha Enduro?


Default

There's a lot to test, but being a 45 year old bike someone has probably had their hands on everything at some point, so for starters verify all connections are correct, especially at the stator as that's a usual spot for confusion/wires misplaced. Then check connectors for corrosion, bullet connectors that have fatigued over time and are not making contact. If you're all good there, the cover is removeable on the regulator, and sometimes the contacts inside (like points contacts) become dirty/corroded and need to be cleaned. similar to points, using a points file and contact cleaner.
In my experience, most often the actual parts are OK, there's something wrong with connections, or dirty connections.
__________________
apex is offline   Reply With Quote
Old 10-11-2017, 08:47 PM   #4
daxiongmao
Enduro Master
 
daxiongmao's Avatar
 
Join Date: Feb 2009
Location: Contra Costa County, Walnut Creek, CA
Posts: 2,645
daxiongmao May possibly Own a  Yamaha Enduro?


Default

.... on these 12v bikes make sure the battery is in very good shape and check and clean the grounds Randy
__________________
daxiongmao is offline   Reply With Quote
Old 10-13-2017, 08:42 AM   #5
Yamamama
Skilled Rider
 
Yamamama's Avatar
 
Join Date: Dec 2011
Location: Up north Wisconsin
Posts: 357
Yamamama May possibly Own a  Yamaha Enduro?


Default

I chased a gremlin on mine and turned out to be a combo of faulty ground AND bum battery I finally went with a Motobatt and all's well in Yamaland. I have had more than 1 battery go south in a matter of weeks, bought cheap, got cheap. Secondly, take a good look at the armature. Needs to be up to spec and clean.
__________________
1969 250 DT1B
1970 125 AT1B
1971 125 AT1C
1972 100 LT2
1972 60 JT2L
1980 XJ650
1975 175 F7
Yamamama is offline   Reply With Quote
Old 10-13-2017, 08:55 AM   #6
Middlezg
 
Join Date: Oct 2017
Location: Louisiana
Posts: 5
Middlezg May possibly Own a  Yamaha Enduro?


Default Update

I tested continuity from the timing plate to the regulator and cleaned (a very dirty) armature. Also, i checked the gaps on the regulator. I should be able to test this weekend and find out if i'm finished yet or not. I'm suspicious of my battery because I got it from a Batteries and Bulbs place for around $30 and the kid that filled it said it was his first one. I will update with results.
Middlezg is offline   Reply With Quote
Old Yesterday, 09:14 PM   #7
lha
Enduro Master
 
lha's Avatar
 
Join Date: Apr 2011
Location: Tennessee
Posts: 2,628
lha May possibly Own a  Yamaha Enduro?


Default

You should have around 13.5-14v at around 2000 RPMs,or at least mine does. My battery has 12.75-13v with key off.
lha is offline   Reply With Quote
Old Yesterday, 10:37 PM   #8
Middlezg
 
Join Date: Oct 2017
Location: Louisiana
Posts: 5
Middlezg May possibly Own a  Yamaha Enduro?


Default Thanks

I managed to get an old manual and test the regulator lead. The adjustment screw on the regulator was about 2 turns out.
Middlezg is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -5. The time now is 05:02 AM.

          

Donations  
             Current_Site_Fund   vBulletin or XenForo?


Powered by vBulletin® Version 3.6.10
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.