SJ50 charge problems

[ntcool]

Hey guys, I've recently purchased an old SJ50qt, the thing is that it's got problems charging.

The battery it came with was shot, so I replaced it. After googling I looked at the possibility it could be the voltage regulator (so I got a working second hand one), swapping it out didn't appear to correct it.

I checked for grounding of the stator (from the regulator plug) found red to be the battery, red/white and yellow go down into the engine (stator?) the Black/white is ground. These all have continuity.

The bike runs, just doesn't charge the battery.

The stator puts out (at the rear of the scooter) max 40v AC

Any ideas?


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[spanner spinner]

check out thread http://www.kiwibiker.co.nz/forums/sh...nition-barrel) as this has wiring diagrams in it which will make it easier to work out what to test. there will be two feeds from the stator to the reg/rec unit (see wiring diagram) these should both put out 40 + volts ac at about 1/2 maximum engine revs. test the earth wire connection to the battery buy running a temporary connection and then test for charge voltage as I have seen plenty of these go high resistance in side the loom but will show a good test with a multimeter as it is working with a low current and will not show up the fault. The reg/rec units also fail on these the only way to test is to swap in a known good unit and test for good charge voltage.