battery de-charging, mosfet replacements, etc
Dave & Tracy Thomas
dave193 at rogers.com
Tue May 22 16:08:48 PDT 2012
looking thru some emails in bike folder, have you tried this yet
Charge your battery. Let it sit a half hour. Check the voltage. If it is
close to 13 volts it's good. If is 12.4 or less, it is shit.
Now, with a good charged battery in the bike, start it and rev to 4000 rpm.
It should read above 14 volts at the battery. It probably won't if you have
the stock SV regulator.
If it reads 13.4 or so, you have a problem. If it reads lower as you rev
higher it is probably the regulator.
Before you change anything, unplug the three wire plug from the alternator
and check pin to pin voltage AC. It should be around 65-70 volts a to b, b
to c , and c to a. If it is, then your regulator is probably bad.
I actually had a bike in a couple weeks ago that had a rotor magnet let go
but that is scarce.
So, under 14 volts DC at the battery, and 60-70 at the alternator? Replace
regulator. Don't put in stock gen one, use a GSXR or CBR 1000.
Ernest Montague: author
From: Jo Rhett
Sent: Monday, May 21, 2012 3:23 AM
To: Suzuki SV650 Mailing List
Subject: battery de-charging, mosfet replacements, etc
So I have finally got my garage set up at the new house where I can work on
the bike. I've still got the de-charge problem, which I have been working
around for 3 months by recharging the battery nightly. It just goes on the
tender immediately when I get home. But I took the bike to Santa Cruz
yesterday and it died a few blocks from my house on the return trip, so the
de-charging issue is clearly getting worse.
I talked to the guy in fremont, but he has no idea when he'll have parts
again. Anyone know of other sources for rectifier replacements?
Also, I thought someone recommended I double-check the coils but I can't
find the e-mail saying how I should check those. Care to remind me?
Jo Rhett / velociRaptor Racing
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