Fuel Pump Issues on a HOT day

Nagasaki24 · Banned Joined: 25 Feb 2013 Karma :

After some googling I found that the fuel pump on my Yamaha YBR 125 Custom has a history of not working when things get to hot....

I today.

My bike was parked in direct sun light for about 2 hours. Not long but it would not start. I noticed the pump was not priming and after the google search I the hose pipe out and sprayed the tank for 5 mins or so to cool it off and the pump came back to life and sounded fine.

Stopped at tesco on the way home, parked in the shade but when I came out it was pumping but it sounded really rough. I had to walk the rest of the way home (less than half a mile).
I left the bike parked in the shade for a few hours to cool off but the fuel pump sound really bad. Its not a smooth sound. Starts off fine but then struggles and stops.

I will try it again in the morning and see how it is.

I read that people have had the pump work fine once it has cooled off as its a temp sensor that is the issue?? But I dont think a temp sensor would cause the pump to sound bad and not run right.

Whats your thoughts on this?

I can get a new pump for around £20 on ebay or the whole assembly for £80+

Is the pump damaged by the heat some how?
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Yamaha SR-125

Nobby the Bastard · Harley Gaydar Joined: 16 Aug 2013 Karma :

Just buy a 20 quid facet copy and replace it.

I'd be surprised if the pump is in the tank so spraying it with water wouldn't really achieve a lot.
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Triumph Sprint ST 1050

Nagasaki24 · Banned Joined: 25 Feb 2013 Karma :

jaffa90 · World Chat Champion Joined: 06 Apr 2016 Karma :

https://www.bikechatforums.com/viewtopic.php?t=328559

Nobby the Bastard · Harley Gaydar Joined: 16 Aug 2013 Karma :

Hmm, fowlers says the pump is in the tank. That's a bit of a shitter.
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Triumph Sprint ST 1050

P. · Red Rocket Joined: 14 Feb 2008 Karma :

jaffa90 · World Chat Champion Joined: 06 Apr 2016 Karma :

HOW MUCH?
https://www.ebay.co.uk/itm/New-OEM-Replace-Fuel-Pump-for-YAMAHA-YBR125-YBR-125-2007-2015-/111713761851

Nagasaki24 · Banned Joined: 25 Feb 2013 Karma :

Well, Today the fuel pump is a-ok.

Sound perfectly fine and runs no problems.. STUPID HEAT!

Is it still worth replacing it?

I could do with out the expense but needs must.

But if its just heat that's the issue I will leave it for now and get it sorted in a month or two
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Yamaha SR-125

Nagasaki24 · Banned Joined: 25 Feb 2013 Karma :

BusterGonads · Trackday Trickster Joined: 18 May 2018 Karma :

The ebaylink doesn't work. It refers to your own ebay account mate.
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2023 Royal Enfield Classic 350; 2000 Honda CG125; 1997 Honda Nighthawk CB250

Fizzoid · World Chat Champion Joined: 06 Sep 2016 Karma :

Apparently it's a PITA to fit, so I find myself just covering the tank when the bikes parked up for prolonged periods
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Nagasaki24 · Banned Joined: 25 Feb 2013 Karma :

Link fixed!

The bike seems to be ok again today, Will have to park it in the shade when at work.

I might fit the new pump next week if need be.

But wont this issue happen with the new pump? Wheres this temp sensor that's causing all this fuss?!
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Yamaha SR-125

MaybeGuy · Super Spammer Joined: 12 Mar 2007 Karma :

Just sell it on a cold day
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!! Mr. Green

Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

Grubscrew · Scooby Slapper Joined: 23 Dec 2018 Karma :

Sounds like the tank pressurises, and the pump cannot kick in due to the pressure.
It shouldn’t happen, as I suggest the tank breather (possibly in the cap,) is the culprit, find it and clean it.
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FJR1300/CBR1000F

Fizzoid · World Chat Champion Joined: 06 Sep 2016 Karma :

If it was a pressure issue then taking the fuel cap off would allow the bike to start?

Because that doesn't work
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Rogerborg wrote: It'd certainly make it easier to ego-find my own posts on pages, given the number of fags (gay like traps) who insist on putting my name in their .sig