Engine starts and cuts out when put in gear,sidestand is up,been out on the bike all day,its running fine,

Okay.....I think you have a sidestand switch problem.
Do you notice that if you leave it in gear after it stalls....that even with the clutch in it won't crank the starter?
The sidestand switch is a plunger that presses in when the sidestand is down. The interlocks on the RS require that to start the bike...with the sidestand down, it must be in neutral. If you place it in gear which the sidestand down, it kills the ignition to prevent riding off and snagging the stand on the road etc..
So if you had the sidestand up before placing it in gear.....since the bike sat for a year...I suspect the plunger for your sidestand switch is stuck partially in (its been pushed in for a year!)
Find the switch down by the sidestand pivot....have someone hold the bike or support it so you can raise the stand, and spray some WD40 on the plunger and work it in and out letting it snap out several times then try it again.

To lose the switches job, cut the 2 wires and twist them together, this will complete the circuit and the bike will think the kick stand is up, I did this, and do you know how many times I took off with the kick stand down??? Lots!! They make a kit that will fix this, it will start with the kickstand down, but kill the engine if it is put in gear.

hi...put kickstand up 1st befor putting in gear....as this how bigger hondas work its a safety thing so u carnt ride off with side stand down...but cuts engine if kickstand still down & then wont start as you in gear.....even if kickstand up wont start in gear!!...hope this helps

now you would have to make sure your clutch is not faulty as if the bike slightly jump while putting it in first gear and cuts off , you most probably have a clutch problem .
this is what you have to try first :
start the bike on while depressing the clutch while in gear and see what happens .
if the bike keeps on running , tension the clutch .
if the bike stall , your clutch could be faulty or your oil could be too ,thick and needs changing .
try this first and let me know how you go

Some models have a 'kill switch' if the sidestand is still out. So the contact, telling the bike that the sidestand is it, might be damaged.

Your sidestand switch kills the engine if the bike is put in gear with the sidestand down. If your stand is up and this is happening either the switch is broken or out of position. If it is broken you can twist the wires together until you can replace the switch. If it is just bent out of position you can bend it back carefully.

Your kickstand switch is either broken or out of position. The bike kills the engine as a safety feature if it thinks the sidestand is down and the bike is put in gear while the engine is running.

Sidestand switch broken or moved? If the switch does not detect the sidestand is retracted it will kill the engine when it is put in gear.

Does the bike have a sidestand switch that cuts the power if the stand is left down? If it does, disconnect it and temporarily join the ends together and try starting....

your clutch is draging adjust the clutch cable so that when you are on the bike with the bike off and in gear and clutch pulled in you can move the bike freely that means the clutch is engaged