Bike was starting fine, left in garage 2 weeks, then turns over fine but wont start. is this a naff fuel pump or what ? The model is an SR-50 Di-tech, which is a moped which however does not feature in the model selection.

check fuel filter and shut off in float chamber , if you have spark and gas , still not firing check timing .

Sounds like you are not getting a charge from the alternator. You need to check battery voltage with a meter with the engine off, key off. Then again with it running, and the voltage should increase. If not, it's not charging.

Check your connections with your battery, you probably disturbed or incompletely put your battery cables on. Any chance you accidentally hooked the battery up backwards for a second? I would check your fuses...

you have a bad fuel pump it's in the tank and only comes on in these conditions.
1. ignition switch turned to the run position turns on for two seconds.
2. same as above but when engine starts pump continues to run as long as engine runs. and the safety switch for blow out prevention has not been tripped.

Your problem is the fuel pump and fuel sock and the check valve in the pump. only one way to be sure and that's pressure testing. You hook up gage to fuel rail turn the ignition key to the run position look at pressure should read 40 to 50 psi and should hold for 1 minute, if you drop 5 pounds in one minute pump is bad and even if it started they could verify that the check valve is not holding pressure.
This is caused by the life of the pump by using gas with ethonal in it and your car was not designed for it, so it damages the pump and injectors and destroys the filter in the pump.

check wireing harnes to fuel pump that yr and model were prone to going bad and causeing fuel pump to kick off and on at wrong time

Its your fuel pump if you can't hear it. And its inside your tank. Not a hard fix if you have a book that tells you how to remove it. Alot of procedures to follow to get it right. And yes it does work off a relay.

bad gas possibly?-just a thought

It all seems to be leading to fuel starvation. Have you checked the tank breather is not blocked which can be a small hole in the petrol cap or a tube from under the tank. It could also be a blocked fuel filter. There should be two. One inside the fuel tank under the petcock, another before the fuel pump. Here is the workshop manual where you can find all info you will ever need for this bike.
Hop this has been useful, rate me if it has...?
Thanks and good luck.
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i had the same problem ! i dont know how but there was water mxit in my tank and i dumpd the fuel then it was fine