Hi,

My CBR600RR keeps shutting off, usually when cornering slowly. I took it for repairs and they said it was a corroded wire and fixed it but the problem came back. I tried a different garage and they said it was a lose wire which they fixed, but it's still happening.

I've temporarily removed the multi connection terminal to try and understand which wire is faulty but I'm stumped. Please look at this video if you have time. I can cause it to shut off by very gently poking the wires.


Thanks!

 

I think you need to strip the outer protective cover right back to the ignition switch and check all the inner wires. My grandson's Honda CBF 125 had a problem that was only solved by me stripping the outer sleeve of the wiring. I found two wires that had corroded through due to water getting in somehow, but once I had repaired them all was well. It could be that two wires inside your cable sleeve are touching each other as you press against the cable. Try it and let us know what you find. I can't think of anything else it might be, but other members may come to your rescue!

 

Yes you were right, underneath the conduit one of the wires was joined by a poor quality spade terminal which had rusted/snapped. It was only held together by the heat shrink covering it. Real genius piece of work with a multi block connector only inches away with a spare terminal in it.

 

Glad you were able to find the fault! Those spade terminals are real cheapo aren't they? They were the cause of my grandson's problem only he couldn't get his rev counter and fuel gauge to work until I'd repaired the wiring. Good result eh?

 

Hi, the bike was fine after repairing the broken wire but now it won't start at all. It turns over but won't fire up. The battery is charged up (13v+ idle and 10.8v when cranking the engine). Also checked the fuses and they are fine.

The dash lights up and lights/indicators work so it seems not related to the previous loose wire. When that wire was loose the dashboard was dead. Unless I snagged or pulled something else loose?

 

Take one of your spark plug leads off an existing spark plug and plug another spark plug into the lead you have taken off. Making sure the plug is earthed against the cylinder head, crank the engine and look for a spark at the plug earthed to the cylinder head. If you are getting a spark there then I would assume the other plugs should be sparking also. The engine needs to spin over fairly quickly to kick into life, as I have found out in the past, although the voltages you quote seem fine to me. Try jump starting from another battery of the same voltage, say from a car and see if that gets your bike going. Other than that it may be a fuel problem. One more thing you could try is to spin the engine over and then take a spark plug out and see if the electrode is wet with petrol. If it is bone dry then fuel isn't getting through to the combustion chambers. Double-check your wiring as well as you just may have disturbed or disconnected something and it's worth looking at. Let us know how you get on?

 

Thanks for the reply. I tested the spark plugs and they do spark. I've checked and rechecked the wires and can't see any problems. It's not far off the service being due so I'll take it to the garage.