Ybr starting issue

[Comfortablynumb]

Seems like a similar problem as the other thread, but don't want to hijack.

Anyway bike was just taken for a 30 mile ride, no problems stop and starting all day. Until I get it home, I was cleaning the bike and want to turn it around. I jump on and there's no usual whirring sound. But the light comes on and goes off as usual.

The bike won't fire, as tho fuel isn't getting in. So I google and see there's a common fault with the temperature sensor in the fuel pump. I figure letting it cool a bit should resolve the issue as it's been a very hot day.

Give it a bit of time to cool, I go to start it up. This time I can hear the pump work, but it sounds totally half assed, like it's dying. The bike fires, but as soon as I touch the throttle it dies. I do this a few times till the pump stops priming again then give up over fear of flattening the battery..

This sounds like a seperate issue, but could both these issues point to a faulty pump?

[Tango]

I was going to ask if your battery is ok? If the problem started after washing the bike could it just be water on the plug cap....

[Comfortablynumb]

It seems the batteries fine, as I just went out to try again and it started up without hesitating.

I'll see if I have the same issue tomorow after a few hours sat in the sun.

[Tango]

I'd say it was some water in the electrics/plug.....and it's now dried out....

[Comfortablynumb]

I actually didn't use water, just polish and some all purpose spray oil not wd40 but similar on the engine parts. So there shouldn't of been any water.

[Adam]

Well the wd40 like product wouldn't have affected it but maybe the polish did? If it starts fine now I wouldn't worry too much about it.

[Ricky]

I thought the YBRs had a faulty fuel pump and when they get left in sun light it can cause them to get a vapour lock?

[Comfortablynumb]

I only used the polish on the fairing. It's the fact the fuel pump wasn't doing it's usual whirring noise makes me doubt it.

The issue is getting to work on it, I don't have much choice regarding parking so it's likely to be sat out in the sun till I go home.

And if it is vapour lock, wouldn't opening the filler cap release the vacuum? Il try it if happens again.

[Comfortablynumb]

Update just tried it again after it being sat in the sun all day. Same issue, gutted. Looks like a trip to the bike shop...

[Ricky]

Park it in the shade for a couple hours and start it, or get a cold hosepipe and cool the tank down?

[Comfortablynumb]

That would likely help I think but not very convieniant in work. opening the gas cap didn't help either

It's going the shop tomorow I'll keep you updated.

[Ricky]

There's no shade at all near your work?

[Ricky]

Apologies, I didn't read your first post properly, I'm basically repeating what you're saying

Get a new fuel pump

[Comfortablynumb]

Yeah there is but they're asses about parking. There's no staff parking for contractors and a little spec out front of the buildings for bikes that's in direct sunlight all day.

[Comfortablynumb]

Got a second hand fuel pump (1000 mile) to the tune of 120 squids with a garuntee... Sad when I've not had the bike for long but all seems well. It's likely the bikes always had the issue and it's probs why the seller got rid after not using it much.

Been to work a few times left it out in the sun and it's starting and priming just fine. This pumps noticeably more noisy. I can hear it running when cruising slowly or stopped in traffic.