Autonerdz forums

Good morning,

I think the thing to do is back up and take another wide angle look at this situation.

Tell us more about this bike. What model is it specifically?
I found this website with info https://www.montesa.com/en/manuals/

I took a look at the 20/20 Montesa 4Ride Shop manual.

If you have compression and spark the engine should run on an alternate fuel source like carb spray or brake clean.

If the engine does run on an alternate fuel source the next logical step is to verify there is a command from the ECM to the injector to open it.

If there is a command we can make the call that this is a fuel flow related issue and not a ECM or RPM input issue.


Try running the engine on an alternate fuel source. We don't need it to run for minutes or hours just a few seconds will do.

Make a capture of the fuel injector(s). We need to see supply voltage, the control from ECM and in an ideal world we would like to know the current flow through the injectors and some sort of crank position signal.