KR-1S.co.uk Forum

KR1S (1990) CONTEXT :

Was out on a fast run and suddenly it cut out and died. Plenty fuel, no leaks, Battery was hot and found it was badly needing topped up with fluid. Replaced with new battery, spark plugs were new/clean, fuses in fuse box were all ok (continuity), new battery seemed to be connecting to ignition (via key turn), NO SPARKS at spark plugs! Neutral light blown and also indicator lights blown.

I delivered it to a local garage and they have so far charged me £80 for only 1 hr looking at it! They told me: "We don't know what is wrong and why it won't start". I was shocked they had not sussed out a coil or CDi issue and had not even checked them! I have to decide what to do now.
* Take it back home and leave it to rot ?
* Get them to investigate further at my cost?
* Take it somewhere else that will be able to suss out what the hell needs done?

Any suggestions?

Hi

It sounds like your regulator/rectifier has blown.
They fry the battery and can take out the CDI and Tacho when they go along with a load of bulbs.

Cheers
Bernie

500bernie wrote: ↑Sun Sep 24, 2023 4:57 am Hi

It sounds like your regulator/rectifier has blown.
They fry the battery and can take out the CDI and Tacho when they go along with a load of bulbs.

Cheers
Bernie

yep. this is your problem.

Had the same problem many years ago but only the battery boiled dry, got a replacement regulator / rectifier online for about £50, it's chinese but at least ten years later it's still working fine, you can get a mosfet regulator that is more expensive but also more reliable, btw the regulator / rectifier is located under the petrol tank up at the headstock.