Posted: Fri Oct 20, 2017 1:56 pm Post subject: Suzuki T350 charging fault - advice please!
Hello, I'm new to this forum having recently acquired a 1970 T350 II. The bike is in nice original condition and I took it out for a shake-out ride of some 75 miles last weekend. It ran well except for being a bit smoky. Then towards the end of the ride the indicators stopped flashing, lights got dim and engine misfiring when brake light or indicators in use. Checked battery voltage which was only 10.8V. Re-charged the almost new battery to 12.8V and the bike re-started with all electrics working normally. Checked the installed battery voltages: 12.5V with ignition off, drops immediately to 11.7V with ignition switched on but engine not running, then 11.2V with engine idling. Barely fluctuates from 11.2V when engine revved. I know this should be at least 13-14V with engine running above idle, so there is a charging fault.
I did notice that the Earth (Ground) wire (Black with white tracer) to the Rectifier has melted insulation but the wire is intact. There's been a bit of splicing of wires by a previous owner around the positive side of the battery in the main loom but all joints appear sound.
Please can anyone advise how best to go about checking the charging circuit and components - I guess I should run continuity checks on all wires but how do I check the function of the rectifier and the alternator?
Joined: Oct 26, 2007 Posts: 2951 Location: Greensburg Pa
Posted: Fri Oct 20, 2017 3:37 pm Post subject:
Welcome to VJMOG. I don't know too much about your bike, but here's a link to a manual and if you look at the first few pages there's some hand written notes about checking the charging system. hope this helps, let us know how you make out. http://www.suzuki2strokes.com/forum/viewtopic.php?p=85918
.......Paul _________________ ï¿½77 CB550f
ï¿½75 GL1000-finally finished
68 CB450K1-taking up all my time
Joined: May 14, 2015 Posts: 109 Location: Alberta, Canada
Posted: Sat Oct 21, 2017 5:01 pm Post subject:
From what I've read, the charging system is a weak point for the GS's. But then it may be similar for the T-suzukis. The "stator papers" from the GS forum are an interesting read and may clarify some of the problems you encountered. http://www.thegsresources.com/index.php
You may already be on the right track. Overheated rectifier wire could be a clue. Easy to check, should have continuity one way, none reverse direction. Also, unless PO wire splices are obviously done correctly with good tight crimp connectors or better yet solder and shrink tube, just re-do them. That may or may not fix your charging issues but if not at least you've eliminated a possible cause and will save yourself future trouble.
Not much to go wrong with the charging system really. A bad stator coil is possible but it's more likely that you have a open circuit somewhere due to bad splices or a bad connection at one of the factory jones plugs. If you unplug them, give them a shot of WD-40 and plug them back in a couple times that often fixes them. _________________ Currently - 75 Suz TS250, 02 Kaw ZX-6R
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