2011 Speed Triple Wont Start After Sitting In Garage For A While

Although it was on a tender, it's not unusual for a battery to still not have enough cca's to fire up the engine (despite voltage being correct) so that would be my first look. Try/borrow one for test?
Side stand and clutch switches checked too as they could also stop it.
And, weirdly, headlight bulbs can stop it starting also. Check them?

 

In the assumption 2011 is carbs (or even if FI) a year with modern ethanol infused petrol in the pipes will almost certainly gum everything up.
My old KTM950SM had to have it’s carbs cleaned every spring after only 3 months of winter rest until I found local ethanol free fuel.
I don’t know if you can get it where you are though.

 

Well first off you dont have carbs but the injectors could be gummed up or even fuel pump. I agree about the battery, you wouldn't be the first, or last, to say the battery is good coz it is on a charger. Check battery at rest with a multimeter, should read around 12.4 to 12.6v. Then press starter and read again, if it drops below 12 v there probably isn't enough in the battery to fire. Can you try jump leads or a known good battery? Don't keep trying with a weak battery, you may bugger up the sprag clutch (starter).
If you can get it running put a dose of fuel additive, redex , lucas, millers or similar in the tank and give it a good run through, if poss a good ride out may sort it.

 

1. Does the motor spin at the usual rpm when cranking?
2. You can hear the fuel pump when turning the key to the on position?