Yamaha YBR 125

[TheCraftyBear]

Hi all

In need of some help. I bought an 07 plate YBR 2 weeks back however I am now having issues. The problem Varys however I am assuming it stems from the same issue. One started (starts fine) I’m neutral the revs are low and sound as though they are bubbling a little so obviously not enough revs to go to gear. Once I allow the bike to warm up for 10-15 mins I can go and get into gear however after 100-15 the bike loses power and the revs drop so I have to pull over and allow the bike to cool (I think).
On other occasions in neutral it revs fine however as soon as I drop into 1st the bike cuts out with three short flashes on the engine management light but not always happening.

Any ideas?

Thanks in advance
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Ben Stubbs

[Easy-X]

Let's break it down...

Starting from cold, what does it do? (A bike should only need a few minutes to warm up so you can ride away.)
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Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[TheCraftyBear]

[Easy-X]

Great! So after it's started, is it running smoothly? If it's 2007 I assume it's carb-based and not EFI... manual choke?
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Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[TheCraftyBear]

[WD Forte]

I look after a ybr125 for guy and have got to know them pretty well
YBR Fault codes are in a long flash - short flash format
For instance, one long two short = 12 = ckp sensor

Error code 0-3 doesn't exist
Error code 3-0 is the tip over sensor
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bikers smell of wee

[WD Forte]

BTW I see no mention of oil checking or clutch adjusting
pretty important y'know
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bikers smell of wee