Question about 1984 Moto Guzzi Le mans III

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LM3 Alternator Brushes

My brushes on the LM3 are getting a tad short. Can I buy them locally at a Repco or Auto One shop (ie get them this afternoon) or will I have to go through a Guzzi shop ie Moto One etc and have them later this week. I have noticed the charge light is only fading not going out completely the last few days. An inspection this morning showed the brushes are well worn.

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  • 2,336 Answers

Most likely Alternator or Starter Motor. Perhaps get both lots? Best if you have them out and with you Might also try your BOSCH Auto Electrician if the others don't have them. ,,

Posted on Nov 10, 2008

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Where is the starter on a xj700 maxum and will a starter repair kit fix it?


A couple of thoughts come to mind. First, testing a battery isn't as straight forward as people think. You can have a poor battery that shows your multi-meter 12V. If you really want to know whether your battery is good, bring it to someone who will load test it. In Canada, Canadian Tire will do that for free.

I only mention this because 99% of the time, getting a "click" when you try to start the bike is a sign of a bad battery. But let's assume for the moment that the battery truly is fine. In that case, there are several possibilities.

1) Your starter solenoid (aka starter relay) may sound as if it's engaging (the click) when it isn't actually making a solid connection internally due to corrosion, for instance. If that's what's going on, it's easy to diagnose by simply jumping the solenoid with a screwdriver (ie. shorting it). If shorting the solenoid terminals externally suddenly gets your starter turning then you need a new solenoid.

2) Assuming your solenoid is good (which can be verified with a circuit tester), if it clicks and engages but the starter doesn't turn, often it's because the contact brushes have come to rest between two adjacent contacts on the commutator. If that's what's going on then put the bike in gear (2nd is easier) and rock it forward so as to cause the starter and engine to rotate a bit - the idea is to push the brushes off the dead spot onto the next contact on the commutator. If this works, it's a sign that your starter needs some TLC... probably new brushes.

3) If the battery is good, the solenoid is good and rotating the engine a bit does nothing, then it's possible that a contact brush is no longer applying enough pressure on the commutator contacts. You may need to replace the brushes. But be fore-warned! New starter brushes for the XJ700 come in two ways
A) You can buy both brushes with leads alone in which case you'll find that one brush lead bolts into place but the second lead will need to be welded into place (there's no bolt and the brush plate is made of stainless steel and can't be soldered).
B) You can buy the starter kit which comes with the one bolt-on brush and the other brush already connected to a new brush plate - and you get some other goodies too, like bearings etc....
Of course, the brushes alone are much cheaper - as I recall from when I did it, they cost me about $23 and another $5 for the welding shop to weld the one brush to the brush plate. But if you have money to burn, the kit is obviously easier.

4) There's also a possibility that one of the armature coil windings has shorted out. That can be tested using the procedure in the service manual.... which is part of the XJCD set ( www.xjcd.org ).

5) If you're lucky, the starter has a bad ground or bad power connection. I'd check and clean those before anything else.

6) I've also come across one starter for an XJ700 which someone had had apart and reassembled wrong. Thrust washers and so on were in the wrong places and there was far too much and too heavy grease in the planetary gears which caused so much resistance that the starter didn't want to turn - I just got a click sound until I opened it up, lightened the grease and put all the washers in the right places.

7) If there's just a click, it's also possible that there might be a problem with the starter clutch...although on an XJ700 that particular problem usually manifests differently.

If you plan to rebuild your starter - carefully note washer locations, use the right grease and not too much of it and be especially careful to note the orientation of the brush plate inside the housing. If you don't, you'll have a heck of a time getting it back together and you'll probably find that the leads for the new brushes come dangerously close to the starter housing (ie. ground). Oh yeah - and be super careful not to damage the insulator around the positive terminal on the side of the starter. It has to be removed to get the starter apart fully but when you put it back, it's really easy to over tighten and crack the insulator which might cause it to fall out of place unexpectedly.

It's really not that difficult but it's wise to make some notes. If you want to see some pictures of an XJ700 starter brush plate and brushes and why there's a bit of difficulty in replacing brushes, you'll find pictures and some more notes here:
http://www.maxim-x.com/pix/starter/brushes/

HAP

Jun 12, 2014 | 1985 Yamaha XJ 700 X Maxim

1 Answer

Goldwing die while running has a new battery jump it but stalled 5 minutes later new brushes in alternator and new battery


check the relay behind the light, pain to get to but usually the problem.
Also, do yourself a favor, take the plug going to stator and splice the wires together, Plugs don't last and if you forget to put the electric grease or put to much, they either short or rust and short) It's under your side cover, 3 wires)

Jun 10, 2011 | 1996 Honda GL 1500 SE Gold Wing

2 Answers

1982 Yamaha XJ 550, the battery will not take a charge. New battery, checked all connections, ran all the tests (stator, brushes, and alternator). Replaced the voltage regulator/recifier. Not sure what is...


It is corrected properly, right? + to the wiring harness and - to ground ... right? Are you certain about the rectifier? Is the battery charged at this time?

You know a alternator cannot make power unless you first put power into it ... right? Alternators (unlike most generators) are not self exciting. If your battery is weak or "dead", the alternator cannot make electricity to charge the battery. I don't know what the rating of your alternator is. Your battery should be fully charged before you do any more tests. If you have a 1 amp charger, allow at least 10 hours for a full charge. Don't cook your battery with a big, powerful, fast charging automotive battery charger.

Good luck with your repair ... I hope you find this response helpful.

Thanks for your question @ FixYa.com

May 02, 2011 | Yamaha XJ 650 Motorcycles

2 Answers

ALTERNATOR NOT CHARGING ... ARE THE BRUSHES REPLACEABLE?


Hi
To answer your question its a yes.Brushes in an alternator are replaceable.
Thanks for using Fixya.

Mar 04, 2011 | 1996 Honda GL 1500 SE Gold Wing

1 Answer

Bike was removed from storage for over twenty years and appears to have an issue with no power to the spark plugs.


You will need to unplug and replug all the connections in the wiring harness. Chances are the fuses all need to be replaced (internal separation).Main switch could have corrosion on internal contacts. You may have to uninstall the points and reinstall them , they are probably shorting to the motor. Remember the motorcycle uses power from the battery to run the motors electrics not from the alternator . If you have charging issues after you get the bike running it could be worn out brushes in the alternator. Check all your electrical connections and you should get spark.

Feb 15, 2011 | 1974 Yamaha XS 650 A

1 Answer

How to rebuild a 84 honda magna vf 700 starter


The only thing you can do is replace the brushes. Honda only sells the complete starter or just the brushes. The plate set and post set of brushes will run $50-$60. Clean the armature contacts with fine grit sandpaper( flat shiny copper). Make sure you only have continuity between every other contact on the armature . If side by side contacts have continuity , buy a new starter(or good used). If any of the magnet coils are burnt or shorted, buy a new starter.

Sep 10, 2010 | Honda V-Twin Magna Motorcycles

1 Answer

How do i repair the starting motor, brushes


If the brushes are badly worn, they will need to be replaced. If there is a starter, alternator repair shop anywhere near where you live, that's where I would start. The brushes themselves are fairly inexpensive, but locating brushes that will fit your starter, can be a rather difficult task. Most dealerships can't even get, just the brushes. They are going to want to sell you a new starter. If you are able to get the brushes, you are probably going to have to solder the new brushes in, which can be rather tough to do, especially if you have never used a soldering iron before, but not impossible.

Aug 27, 2009 | 1997 Honda CBR 1100 XX Super blackbird

2 Answers

Alternator not charging battery on getting 11.5


I had the same problem with my 900 that I just bought, the regulator was fried, so the local kaw shop replaced it with a new one off internet, then it promptly fried the new one, upon further investigation the rotor/armature was reading 1 ohm resistance, supposed toread 4/7 i think anyway, had to have alternater rebuilt , cost 370.00 , works fine now.

Jul 11, 2009 | 1985 kawasaki ZL 900 A1 Eliminator

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