Engine cutting out when idling

[isutty5]

Hi Guys,

I have an issue that has cropped up recently within the last week. My 2012 YBR 125 has started cutting out when idling. I noticed it the other night which was a fairly cold night. However this is a fuel injected bike which has never had issues starting and idling in the coldest of temperatures.

Basically, I can start up the bike, and it will idle for a few minutes, and then cut out, whether the engine is warm or cold, the same issue applies. It's not doing it all the time, but every now and again I'm having this issue. It even happened yesterday while I was on the road, pulled my clutch in and coasted for a few seconds before changing gear, and as i was coasting, the engine cut out, but it restarted as i let the clutch out which obviously bumpstarted the engine as i was moving.

In terms of electrics, nothing seems to be wrong, one of the bulbs in the dash is flickering but it's just that one bulb so I've ordered a new one. The rest is fine.

I was thinking the spark plug may be wearing and missing sparks, however this plug only has 8000 miles on it with the rest of the bike.

I can give the plug a check but what should i be looking for when checking the plug?

The engine Idles at 1200-1300rpm when up to temp. It was lower than this at one point but I adjusted the idle speed on the injector body a while back.

Oil is fine, chain is fine, and I can't think of anything else I should check.

Any advice would be great.

Thank You.

[DreamytimeEscorts]

You could check the plug, it'll never do any harm. I'd check the air filter as well, it could be clogged and starving the engine of air.

[isutty5]

You could check the plug, it'll never do any harm. I'd check the air filter as well, it could be clogged and starving the engine of air.

 

Thanks DreamytimeEscorts,

But I need to know how to tell a worn plug from a good plug. As I'd always expect a plug to start looking used after a few miles with all those sparks they put out.

The air filter is clean as I regularly maintain my bike and the air filter is one I clean out/check once a month.

[Chrissb6]

Here you go mate simple enough!

http://www.gnttype.org/techarea/engine/plugs.html

Being a 4 stroke your motor is not prone to fowling plugs but as said it's a place to start. You might want to check the tick over adjustment also, if set to low the motor will have a tendency to stall.

[Mr Fro]

See here old bean: http://www.fatheadsmotorcycles.com/wp-content/uploads/2012/08/check_spark_plug_condition.jpg

I would have said to check the idle but you've already done that! Air filter and plug are the next logical progressions.

Which dash light is flickering by the way?

Edit: Beat me to it Chris!

[isutty5]

Thanks Guys,

In my opinion, looking at those images, it looks like my spark plug is closer to normal.

But maybe you guys see an issue with mine? Here are some pictures I have just taken of mine.

Also, it's just the bulb behind the tacho that's flickering every now and then.

[Chrissb6]

The gap looks a bit on the large size from the photo's have you checked it? Colour wise looks a bit on the lean side, but it's a fuel injected motor, not something you can play with to be honest. A new plug and check the gap would be my call.

[cockercas]

Do you have full power through out the rev range?