Curvy SV. No engine mods. Various wiring changes inc my own front sub-loom, aftermarket lights (normal bulbs -no HID's) and clocks.
I got stranded with a dead battery last year. New battery fitted and the usual tests confirmed the reg-rec was overcharging. Stator output was OK - somewhere in the region of 60V AC at 5,000 RPM and was the same across all 3 phases. Stator continuity was 0.7ohms - a wee bit out of spec (0.2 to 0.55 ohms according to the manual) but all 3 readings were the same and no path to earth.
New SV shunt reg-rec fitted and getting good stable voltage at tickover and at 5,000 RPM. I also fitted a voltmeter into the headlight bucket to warn of any future problems.
That voltmeter is now telling me that everything is fine up to about 7k RPM at which point it goes a bit mental with the voltmeter needle bouncing back and forward off the stops. At 8,000 RPM and above it shows output voltage at the meter's maximum - something in excess of 20V.
I wonder if the stator output is too high and that's overcoming the reg-rec's capability to regulate voltage - I've no idea how likely or even possible that is.
My thoughts at the moment are I'm going to do the output test again with my multimeter but, instead of 5k RPM I'll need to do it bouncing off the rev limiter (neighbours should love that
). That will confirm, or not, what I'm seeing on the bike's own voltmeter.
I'll then test stator output in the same manner. Is there a maximum safe output that the stator shouldn't exceed?
I might be barking up the wrong tree entirely, of course, so any other thoughts are welcome.