Charging circuit high voltage

Afternoon.

Since buying the thing ive noticed the starter motor seems to struggle a little then stop after a few seconds held on, the battery voltage was fine at 12.8, and i had fully trickle charged it.

So I switch it out with a friends new battery and its perfect, for some reason the battery must not be putting out enough current.

Anyway, i decide to test the charging voltage and i'm getting a steady 16.58v at idle building up to 16.8v further up the revs

Seems rather high, ill be doing a little research into it later, but i thought id ask those with more experience here too.


Can it damage the battery, any reasons to why its so high?


Thanks all.

[Spanner Man]

Good afternoon.


That's a touch too high methinks. It sounds like the rectifier regulator has gone up the pictures.

Charging voltage should be around the 14.5-15 volts maximum. Any higher will result in irreversible damage to the battery.


Cheers.

Thank you, the manual says the same, ill rip seat surround off and test it cheers!

Should of bought a honda.

Anyone know if rectifier sh535c-12 the original suzuki one? Im replacing it ith one of a honda cbr, but i want to know if this is the genuine suzuki oe first.

TY

I replaced my original faulty reg/rec with a suzuki OEM item; it seems to be a differant design to the one it replaced. so far, so good. I am touching some Pine saying that.