Cutting out problem

Hi all
Im trying to help a friend out whos having problems with his VFR cutting out. Just wondering if anyone recognises the symptoms from experience or can shine a light on common problems that may cause this.
Its a bit of a strange one. He starts the bike on its side stand, no problem but when he picks the bike up it cuts out. Then he restarts and pulls away as soon as he turns it cuts out. Starts straight away without problem but he says after it cuts out he can hear the fuel pump prime as if the ignition has come back on. This will happen 6 or 7 times then the bike will run ok.
Sounds to me like an electrical connection or something? Possibly even fuel issue? Ive told him to bypass the side stand switch to eliminate that for now.
Any ideas welcomed
Thanks

 

Oh and i will confirm when i next speak to him but im sure its a 2007 so 6th gen
Thanks

 

Hi Gazzdid and welcome to the forum:welcome:.

Sorry we are sort of working blind on this. I suspect you know stuff which us folks miles away don't.

Its going to be difficult to offer appropriate advice if you don't tell us what version VFR we are talking about? 400, 500, 750, 800, 1200 there are a lot to choose from. Are there other things we should be aware of? Does it have any aftermarket security like an Alarm linked to the immobiliser? Is it displaying any FI MIL Codes? How many miles has it done? When was it last serviced? Was the bike running Ok before? If the fault is a new problem was any work done on the bike at about the same time?

Obviously at this stage I can only offer a few generic suggestions.

If the bike fires up OK and then just dies, then its probably electrical. A fuel quality problem would tend to cause misfiring not an instant shut off.

If your friend is right and he can clearly hear the fuel pump starting to prime when the cut out happens, then I would focus your attention on electrical things which can shut off/interrupt the fuel pump operation - so check the kill switch, and tip over sensor for loose connections and the switch contacts are good. Track down the wiring diagram for the appropriate VFR and see what circuits could have the impact you observe, and test circuits for chafed wiring damage.

Also if the bike has HISS, then make sure there are no other chip keys in close proximity (on the same key ring) which just might interfere with the HISS key sensor circuitry.

If you can make a YouTube video of the start up sequence and capture the bike cutting out - that would really help. Try to show us the instrument panel - so we can see what if any lights show up and when.

Sorry can't be more help.



SkiMad

 

Yeah im sorry about the lack of info at the moment, i haven't looked at the problem myself yet so can only relay what he told me. I will let you know more info when ive seen it first hand myself, i was just putting it out there to see if this is a regular problem that someone might recognise and save me a day of investigating
For example ive had a look through the forum and there seems to be a common problem with the yellow connector from the lighting loom that gives a cutting out fault? The one with all the green/silver cables. Although it seems that applies more to the 5th gen model, there is a case of a 6th gen one melting on here.
The more bike-specific info im armed with the quicker hes sorted and i can go back to supping beer on my day off ;-)
The only other info i really have for now is its a 750, the problem just appeared and it has no alarm etc just the standard immobiliser.
Thanks for your help theres some bits for me to bear in mind in there, and ill let you know how we get on when ive seen it. :-D

 

When you say it cuts oot when stood up or turned I really would focus on the wiring at the uper triple clamp and any that has movement when the bars are moved. Possibly start the bike up on the center stand and slowly wiggle and pull all the related wiring in an effort to duplicate the issue.

 

Thanks, will do. Ill have a look to find out whether its movement in the handle bars or tilting of the bike thats the cause. Then i can try and locate the problem from there. Ill have a look at the clamp thanks