Thumper Club Forum

Technical => Bike Problems/Questions => Topic started by: SteveC#222 on April 02, 2023, 12:14:30 PM

Title: Help! electrical problem!! XBR500
Post by: SteveC#222 on April 02, 2023, 12:14:30 PM

Morning all,

I need a little help with my XBR. I am currently getting my trusty XBR ready for sale - For various reasons I've hardly used it in the last 2 years and I would really like to move it on to someone else who can enjoy it.

Now my problem is this - while it has been largely stood for the last 2 years it has developed an annoying electrical problem - I have started it from time to time, but sometimes it won't start - no spark. However if you play around with the wiring in the headlamp it will start and run well and start again at a later date, but then stop sparking again. I suspect either a broken wire/ bad connection or the ignition/ kill switch.

In order to illiminate the problem I want to basically 'hotwire it' - i.e. bypass the ignition/kill circuits to see if it will start. Can anyone tell me the best way to do it or any other suggestion to track down the issue.

Thanks

( alternatively if anyone wants to take it on as is for a sensible price for an otherwise really nice, VERY original XBR you can pm me.)

Title: Re: Help! electrical problem!! XBR500
Post by: iansoady on April 02, 2023, 03:31:13 PM

Hi Steve.

The kill switch actually shorts out the ignition circuit when in the "stop" postion by connecting together the black/white and green (earth) wires. You could test it by disconnecting the black / white which should eliminate that. The ignition switch also shorts out those two wires. I suspect (although am not sure) that if you disconnect the black / white from the CDI then that would achieve both the above. However you will then have no way of stopping it!

The attached should explain.

Title: Re: Help! electrical problem!! XBR500
Post by: tommy on April 02, 2023, 07:01:28 PM

hi steve
The first thing i would do there is take the headlight  off and check the wires in the shell theres not much room in there and wires get pulled apart , and broken tommy

Title: Re: Help! electrical problem!! XBR500
Post by: SteveC#222 on April 02, 2023, 08:17:46 PM

I've got all the wires out today. I know the problem is somewhere on the front end of the loom it's just tracking it down.....I hate electrics!! >:( >:(

Title: Re: Help! electrical problem!! XBR500
Post by: richardeblack on April 30, 2023, 09:24:08 AM

Did you get it sorted? What was it?
Yes, I hate having the headlamp off the XBR. It always takes me ages to get all the spaghetti back in.
As the switch shorts the ignition to earth, I would doubt a bad connection? Perhaps check the kill switch?
Cheers
Richard