2019 EFI Keeway Superlight 125

[BERT456]

Hi all,
purchased the above bike last October, done 3500 miles and its been great up to now.
The bike starts and idles fine but if I slowly increase the throttle, at around 3000rpm it will either cut out or if I keep opening the throttle it will run, but a little rough.
If the engines cold it will tend to cut out at 3000rpm
If the engines warm it will run a little rough between 2-3000rpm and then seems fine.? May be under powered?

I know little about EFI, but I'm guessing one of the sensors maybe faulty. I think I have identified its sensors correctly,
1) Idle air control valve. 2) TPS. 3) Intake Pressure, then Engine temp and Lambda.

If anyone has any thoughts on what could be causing this issue I would appreciate hearing them. Thanks very much

[Easy-X]

For a start they run a little lean, it seems more noticeable from cold.

I didn't have it quite as bad with mine but I found readjusting the valve gaps to spec made a difference. Also worth eyeballing the spark plug while you're at it along with the air filter.
____________________
Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[jaffa90]

"""2019 EFI Keeway Superlight 125""
Surely under a warranty?
Also sale of goods act.

[Easy-X]

[BERT456]

Hi guys, thx for the replies, Keeways do come with a 2 year warranty if you have
them serviced every 600 miles or 6 months, I decided to try and do servicing myself.
I have read that the TPS sensor works like a potentiometer (volume control knob)
so there maybe some dirt or a break in the sensor thats causing the stalling.
Guess I'm gonna have to spend some money!!!

[Easy-X]

[BERT456]

Yeah Easy-X your right, its easy to focus on one "problem area". My issues seem to be getting worse. Still idles perfect but starting to run like cr*p through the whole rev range now. Gonna be something small I know.
thx