Yamaha SR 125 2003 cutting out in first/idle

[MeanOldWartho...]

New here so apologies if this is in the wrong place, Around a year ago i bought the above as my first bike and it was occasionally cutting out when going into first or when idling over and i simply blamed myself for being brand new etc etc.

However it still does it quite regular and its nearly always when coming to a complete stop then attempting to throttle on and set away. It gets around a quarter turn on the throttle and dies, It also takes a number of attempts to start up again and its not unknown for it to take a good 10-15 seconds before it will let me select a gear and pull away without dying (this is even when the engines hot after running for a good deal of time, not ideal when on a busy 2 lane roundabout and I'm sat there like a lemon cursing the 9 hells) Even when its idling if i don't apply any revs it will die when in neutral and sat still (although I'm not sure if this is simply the age of the bike and a common fault)

Throttle and clutch cable have been adjusted, Passed an MOT a few weeks back and only ever uses Super unleaded petrol. I was thinking perhaps the carb needs a good clean out but being new I'm guessing.

Any help is appreciated TIA

[Nobby the Bastard]

Air leak in the intake.
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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

[Polarbear]

My daughter had one of those and it was a lovely little bike to ride so it's not a fault common to the bike.

Certainly fuel/air related. If Nobby is correct and it's not an obvious split in the carb rubbers try smearing them with vaseline or spraying them with an oil spray. If the fault goes away for a while you know thats the issue.

Other than that I would strip down and clean the carb if it hasn't been done in a while to your knowldge. Check choke linkage while you are at it as if I remember right it's a cable operation. When you have the carb off you can have a really good check of the rubbers for perishing or splits.
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Triumph Trophy Launch Edition

[WD Forte]

I'd whip the plug out and check the colour to see if there are any indications of it tending to run lean or rich.
if not sure post a pic of it here.
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bikers smell of wee

[MeanOldWartho...]

Thanks everyone, turns out the carb and valves are nackered, need to source a replacement and find out how much it’ll cost

Thanks everyone