How to check alternator on '95 Tiger - Triumph Forum: Triumph Rat Motorcycle Forums
Tiger Workshop (archive) Shop Talk, Ideas, Hints, and Tips for smooth running for the 885 - 885i - 955i & 1050i Tigers (Threads in this sub-forum will be progressively moved to their relevant model sub-forum)

LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 12-21-2007, 10:25 PM Thread Starter
New Member
Production 125
Join Date: Dec 2007
Posts: 5
How to check alternator on '95 Tiger

I've had a defective charging system for the past few months on my '95 Tiger with ~ 62K miles on it - fairly common symptoms - voltage starts off around 12 vdc and steadily decreases as the engine runs - to the point that it dies a little under 8 vdc. Put a new battery in - same issue. I've got both the factory service manual as well as the Haynes. The factory one sez very little about troubleshooting the charging system. The Haynes gives a few tests to try - mostly checking the regulator - based on my results, I went ahead & rolled the dice and ordered a new one - appears to be backordered. I've checked the rotor and it's good - next obvious step would be to check the stator, but due to the way the 3 leads tie directly into the rectifier board, I'm uncertain & leary to do so - anyone have a suggestion for this? I've already checked all connections - appear to be good. Thanks!
gosling1 is offline  
Sponsored Links
post #2 of 4 (permalink) Old 12-22-2007, 10:26 AM
Senior Member
Main Motorcycle: 1966 Triumph 5TA / T100
iansoady's Avatar
Join Date: Jun 2005
Location: Birmingham UK
Posts: 1,722
Other Motorcycle: 2005 Suzuki DL650
This is an excellent fault-finding process which should help...

1966 Triumph 5TA/T100
2005 Suzuki DL650
iansoady is offline  
post #3 of 4 (permalink) Old 12-22-2007, 04:35 PM Thread Starter
New Member
Production 125
Join Date: Dec 2007
Posts: 5
Ian -

Thanks for the link - however, someone else had forwarded it some weeks ago to me - spent a few hours trying to decipher it - came to the conclusion that there's just too many differences with my electrical system in comparison to what is shown for it to be a reliable, effective troubleshooting tool. While the Tiger has a Japanese charging system (Nippon-Denso, IIRC), the layout is different enough from what is shown - worried about shorting something else out and causing more issues!
Was hoping that someone on the forum had successfully tested the stator on a 94-98 Truimph and could specifically relay their technique.
gosling1 is offline  
post #4 of 4 (permalink) Old 01-15-2008, 05:03 AM
Grand Prix 125
Main Motorcycle: Tiger 955i
Patman1200's Avatar
Join Date: Dec 2007
Location: Sarf of Englund
Posts: 31
Other Motorcycle: Bandit 1200
Extra Motorcycle: Yamaha TTR250
What you need is an oscilloscope. Check the wave output from the stator.
The charging on my 2001 Tiger (internal alternator no piggyback) failed a few weeks ago, and with only a multi-meter I was getting completely confusing info. All the readings of ohms from the startor said that all 3 phases were good.
5 seconds with a scop showe 15volts from 2 phases and 1 volt from the third.
Got a brand new alternator from these guys for £79 delivered... better than £325 from Triumph.
Patman1200 is offline  
Sponsored Links

Quick Reply
All posts must adhere to Forum Rules

Register Now

In order to be able to post messages on the Triumph Forum: Triumph Rat Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter your valid email address, that can receive an automated confirmation message. Otherwise, you won't be able to gain full access.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
1050 Tiger alternator output dr_gallup Tiger Workshop (archive) 7 09-24-2009 05:09 PM
Dealer valve check costs 2006 Tiger TIGER1454 Tiger Workshop (archive) 8 10-27-2007 12:04 PM
Noisy alternator on 97 tiger 885 carb model. BIGMICK Tiger Workshop (archive) 3 08-22-2007 04:29 PM
Exhaust...check, oil change...check, alarm...check rastataoist Triumph SuperSports 9 03-02-2007 07:17 PM
How do you check the alternator is ok ?? Tiger-G Tiger Workshop (archive) 8 11-22-2006 04:34 PM

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

For the best viewing experience please update your browser to Google Chrome