| smilo which model is you have as this section covers 748 to 998 and those two have completely different ECUs and can suffer from different problems.
I would start by checking for a spark and if fuel was getting through, easy if you know what your doing not so easy if you don't.
If its cranking over and you have no reason to suspect the ignition/spark then a few drops of fuel down the inlets can often help, if it starts then its the fuel not getting through the injectors for one reason or another.
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