There is no test for a reg/ rectifier. stator can be checked for resistance and static tested for output. factory service manual will provide details. if stator passes both tests then replace regulator.
SOURCE: Faulty regulator rectifier- can't start the bike
I have a '07 C90T.
I have just replaced my stator. I replaced the reg/rectifier earlier this year. I replaced the battery one year ago in October.
I firmly believe what started the problem. Two guys that I told I didn't need help, but they pressured me to let them help. They hooked a battery backwards to my bike. A lot of people believe that's what shortened the life of the rectifier and stator.
But keep this in mind. The connections for the regulator/rectifier are not waterproof. I had done a lot of rainy riding and I first found a burnt connector on the discharge side of the reg/rect. My mechanic told me I needed to replace the reg/rect so I did but I soldered the wires and made them waterproof. I didn't do this on the stator side of the reg/rect and a few months later, when the bike quit charging again, I found that connector burnt, so I cut it out and soldered and waterproofed it.
Two days after we got back from a 700 mile round trip to Red River, NM, my bike quit charging again. This time though, I have a voltage meter on the bike, so I was aware of the problem before the bike could strand me someplace. Get one of those btw.
When I checked the old stator after I replaced it, I found the stator good but the pulse signal generator bad. It's required that you replace both btw. You have to, they are joined at the grommet.
Ok well, the battery cost $60 last year and I replaced it myself.
The reg/rect cost $140 through my mechanic and I replaced it myself.
Got the stator online for $173 shipped and they advertise a better stator that puts out 20% more power.
Not counting little things like solder, tape, heatshrink and such, I'm out a little less than $375 on my charging system.
I hope it's a done deal.
Again, some think the problems began when the battery was hooked up wrong, but I lean to believe the sub-standard Suzuki connections may have a hand in this.
Hope this helps. . . Joe
SOURCE: 2006 Suzuki C90T Boulevard will not charge
the altanator is under the left side cover that bulges out, to test the out put with a meter find the plug with the 3 yellow wires that comes from that cover and test with meter set on ac volts 0 to 100 range. put the leads between the wires with them unplugged from harness, test all combantions and you should get about 60 ac volts when you rev motor to 3500 rpm. if this checks good you need the rectifier/regulator not the stator.
SOURCE: can't find dip stick to check oil on suzuki motorcycle c90t
There is no dipstick on suzuki . Stand beside your bike and look on the bottom right side of your crankcase . look for a little site glass window . That is how you
check . if the oil is half way up the glass when you stand bike straight up . . change every 3000, plus filter
SOURCE: no charge happening on my 2007 boulevard c90 seems
the stator is behind the front cover on KS side, must drain oil and will need new gasket, normally when it burns out it takes the rectifier/regulator with it!!
Recommend Ricks Stators on line this is a better replace ment than OEM, mine has lasted 2 1/2 years so far (this was third replacement) Also recommend relocating the regulator to the bottom front of the battery box (requires fab a plate and extending wires and solder connections) this allows it to get more air and stay cooler I also added additional grounds
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