Hi all , I have just got a 2021 520 with 2000 miles on the clock and the last couple of days starting from cold it seems to just turn over without wanting to fire.
I normally turn the ignition on , press the priming button, wait for the fuel pump to stop and then press the starter button and then it just takes ages to start turning over and over before eventually starting, once it has started it has no problem starting again that day. the next day it is the same again.
The battery is good and i keep it on a tender when its parked up in the garage.
Also my head lights come on as soon as its starts running even when the switch is in the off position.
Thank you all in advance.

[2015 Z Force 800 53/Trail EPS]

Check the valve lash. If OK take a compression test. If in range test fuel pressure. If Ok Remove, clean and replace engine speed sensor and test it's ohms. It's in there somewhere (the reason). Just have to find it.