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Have you tested this on your own SV?
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Sorry guys, I know ya'all must love your SV but for some reason, I just don't feel as comfortable on one as I do scraping the pegs on my Goldwing.
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Er, are you having problems with the battery going flat? You haven't said so above. Have you got an alarm or something that is still connected? The odds of having two duff RRs is pretty small, they are quite reliable but obviously some do fail. Also remember that the battery has internal resisitance and the effect of this is greater at higher current. Apart from the voltage dropping as the revs go up, anything else wrong?
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The bike belongs to a friend. He hasn't had any real trouble from the bike since he got it at the dealership he used to work at. (Honda) They had put in a new battery, the wrong one incidentally, and it worked great for about 2 years. It isn't a daily rider, and he has made quite a few modifications to it. The mods really shouldn't have had that much affect on the electrical system but there were some changes to the signals, and at one time he had some kind of jury rigged twin headlight system that has since been replaced with the stock one.
About a month ago now he had to bump start it in the parking lot at work to get it home. When I tested his voltage, it read 12.5 volts. During the load of starting, the voltage dropped to below 3 volts. Seemed pretty obvious to me that it was a battery problem and we replaced it; but not before jump starting the bike to test the charging system.
For those of you who don't know, a bad battery can really screw up a good charging system and can cause incorrect readings. So when I got the voltage drop during the 5000 rpm test I was really sure that the battey was bad. When my friend replaced the battery I wasn't there when he tested it, but he said that the system never got higher than 13.87 and immediately dropped on the 5000 rpm to low 12's volt range. That's when we got the salvaged RR and hooked it up with some voltage improvement but not enough for even government work.
To reiterate:
Battery leakdown test is within specs. <1 mA (.3mA is what I read.)
Battery holds to above 11 volts during start up load. (new)
Stator coil voltage output is above 70 volts AC and resistance across windings and to ground is withing specs.
Voltage charge at idle is between 13.2 and 13.8 regardless of electrical load. (i.e. High Beam, horn and brake light active.)
Voltage charge at 5000 rpm is below 13 volts regardless of load.
All charging readings are from the 'new' RR but are slightly improved over the old one. (tenths of volts)
So me buckos, where to now?