Electrical Problem

Spike_R · Nova Slayer Joined: 30 Nov 2004 Karma :

i noticed my front light was out, then i switched to low beam and that blew aswell, all my dash bulbs have gone pop along with my high beam indicator. what would the problem be?
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Derbi supermoto with cr500 engine, niceee

Git · Brolly Dolly Joined: 17 Dec 2003 Karma :

The first thing I thought of if lots of bulbs blow is an overcharging problem perhaps.

Spike_R · Nova Slayer Joined: 30 Nov 2004 Karma :

its something to do with the rectifier regulator i think Neutral

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Derbi supermoto with cr500 engine, niceee

Git · Brolly Dolly Joined: 17 Dec 2003 Karma :

Your thinking sounds good to me, if the regulator/rectifier is pumping out too many volts this will indeed kill bulbs.
Have you put a volt meter across the battery with the engine running to see what the volts are like?

Spike_R · Nova Slayer Joined: 30 Nov 2004 Karma :

the battery connector was loose will my rectifier now be dead or should it work as normal?

i am going to buy a 30pence dash bulb and put it in tommorow then ride around if its ok i'll put all my main bulbs in ...

hope i dont need a new one !
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Derbi supermoto with cr500 engine, niceee

Git · Brolly Dolly Joined: 17 Dec 2003 Karma :

Spike_R · Nova Slayer Joined: 30 Nov 2004 Karma :

i wired the battery up but its still killing bulbs, the rectifier must be dead Sad

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Derbi supermoto with cr500 engine, niceee

stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

Probably the voltage regulator part of the reg/rec.

Some bikes have a ballast resistor connected in paralell with the headlamp bulb (noteably older CG125s and H100s) if these fail or become disconnected, they will pop bulbs. I doubt your bike has one though as they are pretty old fashioned, I have only ever seen them on 6v direct lighting setups.

As Git says, get a voltmeter accross the battery terminals and measure the voltage with a few revs on. If it is going much above 14.5 volts, the regulator is shot.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

Patto · Derestricted Danger Joined: 29 Mar 2005 Karma :

Hi

Other than wear and tear only two things kill bulbs , over voltage and vibration , so check out them volts, if it is over voltage expect
to see 16-17v at 2500rpm +

Bulbs start popping at around 17-18v dependant on its
susceptibility to vibration oh and how much right hand the bike gets.

duff regulator + mucho right hand = loads of volts and blown bulbs
and if your real unlucky blown condensers , cdi box = (walking)

Can you tell I am talking from painful experience

All the best

Patto