Engine cranks over slowly ,is ok when running but very hard to get running .bike was running ok when put away for winter . battery is new and fully charged.

As the summer months start to come in, we all like to get our motorcycles out and start riding them, but i hear a lot of people saying help, my bike wont start! That is because when you last parked it in the shed for the start of winter, then you made no preparations. With a few simple steps, next summer, you can get your bike out, and fire it up without any problems, ready to ride. There are things you must do when you go into storage, and a few things to do when you bring your bike out.
OK,so winter is approaching, and you want to put your bike away in the shed.
First thing you need to do is drain some fluids. Drain your engine oil. Then drain your gas tank and carburetors. It is important to drain the carbys, as the fuel left in the float bowl will go bad. You can choose to totally drain your gas tank, or fill it to the top with gas. Storing a tank full with gas, leaves no room for moisture to form, causing rust on the inside of steel tanks. Next, you need to also disconnect one lead from your battery, or even better, if you have a trickle charger hooked up to it. Thats about it really. Also,if you are confident in doing so, remove spark plug, or plugs, and spray some penetrating oil down into each cylinder, turn engine over to work it through. This will prevent any moisture or corrosion from forming on the inside of your cylinders. It is also a good idea to clean or replace your spark plugs each year anyway.
Now it's summer, and you want to ride, just roll your bike out. Put in some fresh engine oil, a fresh tank of gas, and a fully charged battery, you are ready to go!