YBR125 Fuel Injected Hard to Start Cold

[adrian1112]

Hi All,

Adrian here and I'm (very ) new to motorcycling so please be nice . I recently bought a used 2011 reg YBR125 and it worked well for the first week or so but I'm now having trouble starting it.

Essentially, when starting the engine from 'cold' (left overnight), it takes several attempts to get the bike started. It takes 5-7 attempts of about 5 seconds each, it's turning over. I'm worried that this will ruin the starter motor eventually. Once the bike is started, I can immediately turn it off and starting is now easy (first time). I thought that maybe it's the spark plug so I've replaced it and I've charged the battery with an Oximiser 900. This has made no difference. If I leave it parked for a few hours, it will turn on fine on the first/max second attempt.

It's fuel injected and has no kickstart. When I turn the ignition on, I can hear the fuel pump whine and there are no engine fault codes flashing.

I don't know where I should go from here so thought I'd ask for advice before going to a workshop with it? Thanks

[jaffa90]

Are you twisting the throttle when cold starting?

[adrian1112]

Hi, Thanks for replying so soon!

Yep, I twist it by about 1/4.

[jaffa90]

You should not touch the throttle when starting from cold, see how it goes for now.

[DrSnoosnoo]

[DrSnoosnoo]

[jaffa90]

Dr Dr , lets keep things simple for now!

[adrian1112]

[adrian1112]

[jaffa90]

As my second post,
you may have a loose connection in the starter button casing.
Needs sorting.

[DrSnoosnoo]

[adrian1112]

Sounds like you're right guys. I also gave the local Yamaha dealer a call and asked and they confirmed that I shouldn't need to touch the throttle at all when starting, he reckons it's something to do with the throttle body assembly.

Thinking back, about 1 week ago, I dropped the bike on to it's right hand side when trying to park it against a wall at home (in my defence, t's a bit of an acrobatics excercise as the gap is so narrow). I didn't think much of it at the time as it worked fine for a few days. Looks like I may've damaged the throttle body in that drop.

Looks like I'll have to get it into a shop as I'd have no idea what I'm doing, annoying as I'm skint from buying motorbiking stuff!! :/

Cheers for the help, hopefully I can get this fixed!

[DrSnoosnoo]

[adrian1112]

[DrDonnyBrago]

[dydey90]

£15 to fix it
____________________
This post is probably not serious and shouldn't be taken literally.
Past: CBR125,ER6f NINJA 650, ZZR600 Current: VFR750

[adrian1112]

[adrian1112]

One more question... I was going out this morning and it just wouldn't start at all despite about 10 attempts. I tried my first bump start so I put into the 2nd and literally walked with it (~5 mph) and let out the clutch out slightly and pressed the starter and it started first time. I didn't even need any throttle on this occasion.

The engine oil looks OK colour wise on the dip stick but could it just be old engine oil which makes the engine to stiff to turn by the starter motor without the assistance from me moving the bike? Yesterday and today are the coldest mornings since I've had the bike so oil will be at it's thickest??

I'll change the oil anyway but want to see if this theory makes any sense to people with experience?

[Riejufixing]

[jaffa90]

Your bike should have safety switches on the side stand, clutch lever and a neutral light, preventing start ups.
I suggest you read the handbook available in google.