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2003 750 Magna. Why are voltage regulator wires and the plug in they go to getting very hot?

The wires & plug in are getting so hot you cannot hold on to them long but the battery is charging a little more than 14 volts. I replaced the voltage regulator last yr. but haven't ridden the motorcycle on long trips, just short ones, a few miles or so. Could it be that the home made connectors I have it connected with could be causing this problem ?

Posted by sherman north on


5 Related Answers

francis rivero

  • 958 Answers

SOURCE: Alternator or Voltage regulator

if you can carefully put a metal wrench on the rotating pulley of the alternator and felt a magnetism attracting the metal wrench, then your alternator is charging. if there is no magnetism, then the alternator is not charging...

another test is to measure the voltage on the small wires that went in to the alternator that says "F" for field, it should measure battery voltage...that is the voltage from the regulator..that means your regulator is working...but the altrntor is not..

without that battery voltage, then the regulator is he culprit...

pls be carefull...

hope i was able to solve ur problem..

pls rate me.. tnx, drcool..

Posted on Jul 26, 2008


Scott Albert

  • 10 Answers

SOURCE: no power from transformer

I had the same thing happen on my original Roady2. I suspect the powerplug port on the Roady2 unit is not getting a good connection. Does the transformer plug have a plastic tip? You can try to cut that off with a sharp razor blade. Sometimes that will make a good tight connection. What I did was buy a used Roady2 unit on ebay. Also another cause is

the power connection is not being made by an internal problem or wear caused by constantly plugging and unplugging the power port. I use a Cambridge XM playdock boombox at home. I bet getting a different unit will solve the problem. The only problem is that finding a used unit might take some work. Good Luck

Posted on Oct 27, 2008



  • 125 Answers

SOURCE: 1996 honda VT1100c2 backfiring & missing when accelerating

Replace Fuel Filter.
Test fuel pump output.
Remove and service carburetors.

Posted on Jun 15, 2009



  • 5660 Answers

SOURCE: harley davidson battery went dead after riding


You charged the battery off of the battery charger with a trickle charge. The battery wouldn't charge while you're riding, because your alternator took a [email protected]
(Sorry if I seem gruff, but I'm an old biker, and Harleys are all I ride. I'm also a Harley mechanic.
Shhhh! I don't want that to get around! lol!)

3.Battery is at 13.4 volts now? What is the specific gravity of the acid in each cell? Don't have a hydrometer? Do you have a load tester? No? Since you measured the voltage, do you have a multimeter?

Test the voltage with the bike running. It should be around 14.6 volts when charging, less with the battery fully charged.
Don't get the correct reading, then you better look at alternator replacement. (Regulator is built in)

Posted on Jul 13, 2009


  • 221 Answers

SOURCE: wire connector between stator & voltage reg/rectifier burnt

your voltage/reg. can be tested in a couple different ways check ground res. check res. then revs. bias on diodes you have ac in dc out it sounds like you may have a diode gone bad allowing ac curent to flow causing the wires to get hot

Posted on Jul 31, 2009

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1 Answer

I hava a 2000 honda magna my battery is brend new but for some reason it doesnt charge what are the posible caues for that .

with a voltmeter plugged on the batt. at idle you should have around 13.4 and 15.5 at 5500 rpm if not unplug the neg. pole of the batt. and the plug on the voltage regulator you will see 3 yellow wires with a ohm meter all 3 wires should have the resistance about 5 ohms that will validate the stator if it is good try a voltage regulator hope this will help you

Aug 14, 2011 | Honda VF 750 C Magna Motorcycles

1 Answer

Battery went dead while riding. changed regulator. charging now but stator wires getting hot is that normal?

No this is NOT normal. This is an indication that you are drawing too much current for some reason or that you have a bad connection at the plug where the wires from the regulator plugs into the case. By stator wires, I'm assuming you are talking about the two wires that come from the engine case up to the voltage regulator. The stator is actually inside the primary and you can't get to those wires to feel how hot they are.

Good luck

Oct 08, 2010 | 2000 Harley Davidson FLHTCUI Electra Glide...

1 Answer

Cub cadet 2135 blows fuses, it was fine until I changed the coil, could the voltage regulator be bad? what if I put the wrong coil on? I made jumpers and it gets real hot real fast but when i unhook...

Let me answer each of your questions 1 at a time, why did you change the coil? Was it because it didn't run or for some other reason. What fuse is it blowing? The voltage regulator is only used for your charging system, generally stator is in the flywheel and the armature is bolted to the block under the flywheel. Your voltage regulator is mounted on the engine shroud. Your regulator will get hot / warm to the touch only with the key on it will get hot with the engine not running because there is no cooling air going over the voltage regulator. Your coil is in the ignition circuit it sounds like you have a wire croosed from when you changed out your coil. If this is not the case then you may have a bad coil.

Sep 15, 2009 | Mtd Garden

2 Answers

Voltage regulator overheating, wires getting hot

These regulator get very hot by nature - so difficult to assess whether this is normal behaviour or not. 
Start by measurng the voltage to the battery with engine running, to determine if there is a failure of the charging system. 

The Rectrifier stage may indeed be shorted, which is causing the wires to overheat. Poor connections at the connector plug can also cause this however.

Follow my guide here to check out your chaging system

Apr 02, 2009 | 2004 Triumph Daytona 955i

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