Well, the good news is, I went and had my motorcycle checked out yesterday and it's not eh stator that's bad.

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Well, the good news is, I went and had my motorcycle checked out yesterday and it's not eh stator that's bad. Turns out the stator is putting out the right amount (of voltage/amps?) and it might be the very less expensive rectifyer. Woot!

Comments

John Nelson (Jónico) said…
Great, I hope it's the rectifier. My bike ALWAYS has a problem producing enough juice to keep the battery charged and the headlight on at the same time. Rumor has it it may also need tweaking the rectifier. So keep us posted!
January 22, 2013 at 3:18 PM
Olaf Fichtner said…
Can a rectifier be tweaked? It should only be a bunch of diodes (or a single diode bridge) plus a capacitor perhaps. I tried to take one apart once, but it was completely sealed, no way to open without damaging.
January 22, 2013 at 5:21 PM
Mike Luca said…
My street triple had a rectifier recall. It got changed to a mosfet style, which is supposed to run cooler.
January 22, 2013 at 8:14 PM
Olaf Fichtner said…
MOSFETs don't rectify, so I suppose the rectifier also stabilizes the output voltage. A MOSFET can run cooler due to lower internal resistance.
January 22, 2013 at 8:57 PM
Jason ON said…
I was just doing some research on SV-portal and SVRider on stators and magnetos and now I'm scared again.
January 22, 2013 at 9:53 PM
John Nelson (Jónico) said…
The electricals are all scary. I am clueless about them. Olaf Fichtner what parts can be tweaked or replaced with others to get more charge to the battery? My mechanic said the alternator is fine...
January 22, 2013 at 11:54 PM
Olaf Fichtner said…
Good question, I should really have googled schematics way earlier. (though I don't have that problem now) From what I've seen, some bikes have single-phase generators, others are triple-phase. The basic difference for rectifier/regulator is in the number of diodes it takes to rectify the voltage.

After that the voltage needs to be "regulated", limited to probably around 14V, because that should be the max voltage for a 12V lead acid battery.

In your case, John Nelson, it could be that either the voltage is set too low or that the transistor they use in the regulator does not allow much current to go through. If your garage agrees, I would suggest to ask if they let you try one of those "MOSFET" regulators for a week. The difference should be obvious.
January 23, 2013 at 12:03 AM
John Nelson (Jónico) said…
Thanks for the clear and logical explanation and the good advice. I'll ask about the MOSFET on Friday at the mechanics and see how it goes.
January 23, 2013 at 12:19 AM
Mike Luca said…
My bad...the piece on my bike was a regulator/rectifier unit, under the seat, next to the exhaust pipe. They would run hot and fail. I'm guessing the mosfet component is on the regulator side. Anyway, the fixed it gratis after the warranty was over.
January 23, 2013 at 4:19 AM
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