Engine running on one piston

Hi Guys,

Wondering if you could help me out!

I have a VL800 55 reg, when riding if i turn left it goes onto one piston, if i turn the engine off and back on again it will go back to normal until i turn left again. When i start up from being stood for a while it may do the same but i was wondering if that was because the stand tilts it to the left slightly? 

I have changed the coils and plugs but it is still doing it. I was wondering if it was the tilt sensor but it's baffling me as to why it wouldn't fully cut out if it was?

Any help would be greatly appreciated.

Thanks 

Daniel

I would check the wiring, could be the HT lead that has rubbed through and shorts on the frame when you lean to the left or even a broken wire in the harness that feeds the coils. I have seen intermittent indicators before where the wire has broken in the loom round the headstock and only breaks when turning in one direction. It's time to take the tank off and do some detective work.

 Does it do it when it's running on the side stand in neutral?

I would be having a hard look at any piece of wiring harness that runs under the seat or the fuel tank that may be getting pinched as you lean.

Yep, sounds like an intermittent electrical fault, and as others have said, the most common problem is a broken wire somewhere - but these can be difficult to detect.

As mentioned you will need to take the seat & tank off to have a look for any signs of chaffing/nipping of wires. It would be useful to also carefully check lock to lock on the handlebars to see if any part of the wiring loom is getting tight.

If you have recently installed anything electrical it wsould be worth back tracking on that installation to make sure all connections are still sound & nothing else is 'disturbed'.

You say the bike cuts out when turning left. Now what exactly do you mean ? Is this turning left at slow speed where you are actually turning the handlebars with the turn, or does it include turning left at higher speed where you are banking/weight shifting rather than 'waggling the bars' - only asking this as if it is only at slow speed when turning the bars it would most likely suggest something in the headstock area - or wiring being put under tension in that area.

Hope you have some joy in your explorations.

     Yam

Could it be fuel starvation in this cylinder when it happens?

Are you turning left & putting the indicators on ?  When you say "tilt sensor", do you mean the side-stand cut-out switch ?  That would cut it out completely - I know that from experience.

could you put a tempery wire in to see if it still does it

MTKTF wrote:

 I was wondering if it was the tilt sensor but it's baffling me as to why it wouldn't fully cut out if it was?

It would fully cut out, here's how a tip over sensor works, the bike would have to be basically on it's side for it to kick in.

http://www.ebay.co.uk/itm/SUZUKI-VL800-INTRUDER-C800-2012-06-15-TILT-ANGLE-BANK-SENSOR-FUEL-CUT-OFF-/261916288230?hash=item3cfb6d64e6:g:t-MAAOSwv0tVcXPS