aprilia rs 125 charging problem

neiloggy1 · Renault 5 Driver Joined: 28 Jun 2009 Karma :

bought an rs 125 for some summer fun, turning slowly into a summer nightmare,
anyways its a 1998 model with dual air intake on front fairing,
the battery was going flat so i bought,filled,charged and fitted a new batterty into the bike,iam lucky as a friend also has an aprilia 125 to compare against,
when he switches his egnition on it reads 21.6v
whe i swith egnition on i get 12.8
but when he starts and revs to 5000 his reads 14.3v
mine however when started and revd goes down to 11.6
and
down even further when i use lights etc
what can be causing this can anyone help i have 3 kids and very small budget please dont suggest a four stroke??????
____________________
98 zx9r

smegballs · World Chat Champion Joined: 28 Oct 2007 Karma :

You sure he gets 21.6V when he turn his ignition on!!!

I didn't know aprillia made 21V electrical systems!

Assuming you meant 12.6V, if he will let you nick his rec /reg and plug it in your bike then see if it works.

If his makes your bike charge then you know your reg/rec is at fault.

If not the problem is elsewhere so you will need to look at loose connections, generator winding outputs etc etc

Rich

neiloggy1 · Renault 5 Driver Joined: 28 Jun 2009 Karma :

cheers will ask him later,r they easy to take off change what does it look like ohh n yes im an idiot 12.6 cheers
____________________
98 zx9r

neiloggy1 · Renault 5 Driver Joined: 28 Jun 2009 Karma :

hi all just done a voltage check
first off did a regulated check on battery
and no rise in voltage

so

i now do an unregulated check on the magneto/altenator
and all is good its pumping out plenty of juice

so does this mean i have a faulty regulator/rectifier
or is it possible of loose connection or broken wires
just need someone to confirm really.
____________________
98 zx9r

80sbiker · L Plate Warrior Joined: 22 Apr 2009 Karma :

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

neiloggy1 · Renault 5 Driver Joined: 28 Jun 2009 Karma :

thanks all for advice all is good now

i tryed my mates regulater and nothing just the same but when i unpluged the regulater i noticed a broken connector inside the connector unit on the bike

so i just bypassed the wire and dada all is good

my batt is now showing 13.1 v and 14.2 v at 6000 revs

sorry for explaination,basically make sure you check all wires and connectors as 1 wire was was broke, i feel so dumb now lol....

but at least i fixed it cheers ne way
____________________
98 zx9r