Help needed please..

[garym]

Ok, I have a Kymco Pulsar 125. In the last two or three weeks it's fried 2 voltage regulators/rectifiers, can anyone suggest why?

[Robby]

Two possibilities come to mind:

1. Inferior quality pattern parts. Are they genuine Kymco ones, or very cheap pattern ones off ebay?

2. Poor earth. I assume the reg/rec grounds out through the frame and back to the battery this way. Make sure that the frame earths are clean (not rusted/corroded) where the reg/rec connects to the frame and where the battery negative connects to the frame.

A reg/rec is not meant to fry. To kill it generally needs heat, which is caused by it being place in a very hot place (unlikely if you're mounting it in the original place) or its getting lots of charge in but can't dissipate it (poor earth).

A third alternative is to try fitting a reg/rec from another bike. Kymco are a small manufacturer so probably copy electrics from Honda, Suzuki or Kawasaki. A reg/rec is a fairly generic unit, so you will be able to fit one from another make and model altogether by identifying the wires and fitting a different wiring connector. Honda 250/400 superdream ones always had a repuation of being tough.

[garym]

Thanks for the reply. The problem started when the bike just seemed to stop charging one day. I sourced another regulator from someone nearby, genuine kymco part, and replaced it. This fixed the problem, although I'm now back to square one. I'll check all the earths later. Cheers.

[skatefreak]

Yeah, sounds like an earth problem is more likely,
Kymco used to produce honda parts back in the day and their genuine parts arnt to bad to be hones.

Break out a multi meter and see what you can turn up. Have a google and try dig up a service manual for the bike.

Best regards

-Jvr