Headlight issue - Motorbike rather than Lotus

[ed]

One for Robin perhaps.....

I am having issues with my bike headlight. (CB500F Honda)

At the moment at low revs and low speed the headlight cuts out occasionally. Higher speed it never happens. I do not believe it is a loose connection.

My bike headlight has a relay that kills the power to the headlight when the ignition is pressed. Could a faulty relay kill the power during low speed low rev scenarios?

[robin]

My guess is that your battery is dying. When the alternator is at low revs its output drops off. Normally the battery would keep the light on anyway, but if it's a bit crap it might not be able to (could be the relay dropping out for pretty much the same reason).

Happy to take a look if you want to pop round one day/evening.

Cheers,
Robin

[mckeann]

Honda Regulator Rectifiers are notoriously crap so may not be outputting 14V to the battery.

Give Davie at bells burn a calll, he might be able to diagnose over the phone if it’s a common fault

[ed]

Thanks both, Bike going in for a service next week so ill get him to look at it.