I Need Your Help Guys :-( - TwoWheelForum: Motorcycle and Sportbike forums
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post #1 of 4 (permalink) Old 05-27-2008, 09:00 PM Thread Starter
Join Date: Jun 2006
Posts: 38
I Need Your Help Guys :-(

Cb400 F Charging Problem
Hello Everyone, I Hope Everyone Is Enjoying The Warming Weather:-)
I Need Some Help Here :-(
We Are 3 Guys, All Have Same Bike, Cb400f 1977
Out Of 3 Bikes, 2 Of Them Have Charging Problem, I Put A Brand New Battery, Starts And Runs Well For A While, Then The Battery Is Dead. It Keeps Doing That . I Know It Could Be Alternator, How Do I Check If Its That Or Not? And What Else Could It Possibly Be?
2 Bikes Do That So It Makes Me Think Something In General With The Model Maybe? I Just Dont Know
I Need Some Advice :-) What Should I Check And How?
Thanks To Everobdy And Ride Safe :-)~~
serkant3 is offline  
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post #2 of 4 (permalink) Old 05-28-2008, 05:48 AM
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Join Date: Feb 2008
Location: Winona Lake, IN
Posts: 131
You 3 should go together and by a service manual that can walk you through checking the stator and rectifier.
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post #3 of 4 (permalink) Old 05-28-2008, 06:04 AM
Join Date: Apr 2007
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Do basic checks before ripping anything apart. Check All fuses. most bikes have an inline fuse from battery to alt or rectifier(somewhere in positive side). if all your fuses are good consider your skill level and decide if you really can get into working on a 77 with possible wiring or partial disassembly for repairs. Most can handle bike repairs but downtime is another problem.
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post #4 of 4 (permalink) Old 05-28-2008, 07:59 PM
Join Date: Apr 2005
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you might wanna look on sohc4.com.
junk yard jon is offline  
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