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I've been doing some pulling apart and testing on my new 1982 Honda CB900 Custom's charging system issues. I couldn't get any of the tests in my Clymer manual to work, so I took the rotor, stator and voltage regulator/rectifier to the local Honda dealer to test. They said the rotor is good, but the stator and rectifier are bad.

They quoted me about $450 for new ones with a 6 month warranty. I've found these parts at http://www.rmstator.com/index.php/Motor ... 00C_Custom for a total of about $230 plus shipping, with a one year warranty. The guy at the dealership told me those are not very good and will not last long (in fact, he thinks that's what the last rectifier was, as the guy I bought it from told me he just replaced it himself).

Has anyone used RMStator products? Do they stick by their warranty? Do they look good?

As it is, I'm broke from buying the bike and have to park it for a couple of weeks, but $230 would get me there quicker and allow me to get some much needed gear at the same time.

Thanks for any info!

Branton

The first thing I would do is ask how he determined that the parts are bad.

Well, I'm not sure about the rectifier, but he the Clymer test on the stator (no black to white wire continuity) failed for me as well. Also, he showed me the melting and discoloration on the windings. It looks bad now that I see it.

Also, none of the Clymer tests worked for me, which means something is definitely wrong. Is there anything else I should try?

First of all you didnt say what problems you were having with the bike. What were the symptoms? And none of the tests worked for you? You need to give more info. As far as going with another stock honda regulator rectifier, dont do it. There known to have problems. Mine went out on my vtr 250 and I replaced it with one from electrex out of cali for 100 bucks. There regulators are better then stock and I think they might also make stators. Before you replace anything make sure the stuff you have is bad.

Yeah theyve got a new stator for your bike for $129 and a new regulator for $100. There stuff is better then stock and they use to replace it for free if it went bad. Dont know anymore. Also theyve changed there name to electrosport. http://www.electrosport.com/electrospor ... onda2.html

Sorry if I didn't give enough info. The problem I was having was a battery that kept dying. I bought a new battery and it worked for a day before dying. I then charged the battery a lot more than the battery shop did and it's lasted longer, but I'm sure there's still a problem, so I was going through all the tests in the Clymer manual.

The tests were checking amperage across the fusable link on the left side while revving the engine. I hardly got 2 amps at 5,000 rpm, where the manual said I should get 8 at 4,000. I then started testing individual pieces, like continuity across some of the leads on the stator and the manual says if there is not continuity between the black and white leads, then it's bad. I got no continuity across the leads. I'm now wondering if I should have had the stator and rotor attached to do the tests properly.

The tests on the rotor worked. They said to check resistance across the slip rings and between slip rings and the core. I had 4.6 ohms across the slip rings and nothing between each slip ring and the core.

Then there was the rectifier. The tests in the book confused the hell out of me, so I'm not sure about it. I was supposed to check about 20 different sets of wires, but I couldn't get readings on any of them. I'm now suspecting that it's because I had the stator and rotor off.

Any suggestions for making absolutely sure that they are bad before I spend the money?

Thanks!

Branton

No offence, I know you're new here, but you might have better results for topics like this in the Total Motorcycle Garage sections which include

1. General Maintenance & Appearance
2. Trouble Shooting
3. Everything Else

Maybe a moderator could move it for you...

Sorry, I didn't see that forum. How would I go about getting it moved?

Branton

Of course they are going to tell you not to buy from someone else, they want your money!

Your battery is either being undercharged or overcharged. Did you check your battery to see if it had any fluid left in it(is it sealed)? If the regulator is bad and the stator is over charging the battery you will smell it burning the fluid out. Put the stator and regulator back on the bike. Make sure your battery has a full charge. Turn the bike on warm it up and rev it up to 5,000 rpm. The voltage across your battery should be 13.5 v to 15.5 volts. If its over 15.5 the regulator is bad. If its lower it could be the stator and or regulator. Heres a troubleshooting diagram http://www.electrosport.com/electrospor ... nding.html.
Good luck