Hi all,
2009 YBR 125 fuel injection.
been having some issues, firstly my bike wouldn't start in the heat so changed the fuel pump and now she starts in 35 degrees in the sunshine which is a winner and the pump sounds really strong.
Next I discovered it keeps cutting out at low revs which is annoying at traffic lights or going to pull off etc, now it's just running rough as toast but when you give it some revs and ride it above 5k it seems fine. It's like it's just misfiring so it's had a new spark plug and the air filter is super clean. It's almost like it's hunting and the throttle response is abysmal.
I'm going to check the coil/HT lead, injector check (just visual I assume is all I can do) and valve clearances. Is there anything obvious I should check, I mean it's a simple engine but it's driving me nuts.
Thanks in advance all
Ian