CB500F Electrical Problems

I_have_a_cb500f · L Plate Warrior Joined: 21 Mar 2024 Karma :

I recently purchased a 2016 Honda CB500F. This is my first A2 bike. The bike has been fine until yesterday when I turned the ignition switch on and the dashboard started flickering. The bike worked fine so I continued home but pulled over into a car park half way just to switch it off and on again to see if that fixed it.

After switching it off, I turned the ignition switch back to on and none of the electrics worked at all. I noticed after I switched it back off the HISS light would continue flashing like normal. I switched it on and bumped it and it was fine but the dashboard continued to flicker.

If I keep revs above 4000rpm the dashboard works fine but with a check engine light. I thought since the bike had been kept in storage for nearly a year the battery would be dead. After charging it it was fine for a few starts but then it started happening again. Do I just need a new battery? My next problem is finding a new battery, all writing on this battery has completely faded but I think it's a yuasa. Any advice on what capacity I need?

Any help would be great thanks.

WD Forte · World Chat Champion Joined: 17 Jun 2010 Karma :

Well done for providing a vid
As it continues to run but the display is erratic
I'll guess its a poor connection or ground in the wiring or possible dry PCB joint inside the clock causing the problem.
I have known ignition switches to develop bad contacts and dry joints
over time too but that usually affects main power where your problem
seem to be confined to the display.

To start with, I'd buy a can of switch cleaner from say Halfords and open all connectors related to the display and check/clean them all to see if that has any effect.
Check all the connector pins are properly located in the shells
and shiny not oxidised, bent or otherwise damaged.
Also check for continuity from all dark green ( ground) wires to the battery neg terminal and frame with a meter.

If it still continues to be erratic after the check/clean you may have to
open the clock for inspection of the PCB
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bikers smell of wee

UncleFester · World Chat Champion Joined: 30 Jun 2013 Karma :

I think i'd be tempted to throw a new battery on too. If nothing else, it's good to have a spare and get yourself an Optimate or some battery conditioner to keep things charged if it's not in use.
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Module 1 and 2 passed - October 2014. Happy owner of a 2017 Z1000SX, ex owner of a YBR125 / CB500 / VFR800.