You may be lucky , Stored inside the house, They don't go Rusty,
I have done it for a few years !.
With the Spark plugs out squirt some WD40 down the plug holes,
This can free off the piston rings and valve stems,
As long as the engine is free to turn over ?,
If the engine oil is low in the oil tank ?
You may have wet sumped ?, Sometimes the oil drains down over a Winter,
And over fills the DRY Sump, There is a drain bolt in a big hole in the left side,
Prop stand support plate, Left, When sitting on the bike !!!,
Refill the tank with maybe 30 weight oil to the metal bar inside about 3 inches from the top,
Maybe change petrol feed rubber tubes, Ethanol in petrol can break up the old tubing ?,
Take the rocker caps off and put some oil down there to get to the cams and followers,
Sometimes when a valve is open, The caps start to undo them jam up,
Just turn the engine over a small amount and it will allow that cap to undo,
Same for other caps !!,
Take the brass bigend feed quill out of the Timing case and squirt some oil up the hole
To prime the bigends ?,
Take the plugs out and keep turning the engine over,
Buy some new spark plugs adjust the gaps to 20 thou",
If you get it running , Take the oil filler cap off and Check that the engine oil is returning,
To the tank via a small hole, Just below the filler ,
Good Luck, Bill.
Check the gearbox oil level, via the dipstick , Only want the oil to come to the end of the stick,
Where there is a flat bit,
Also the primary chaincase, Oil can drain via the engine and over fill which will mess the clutch up !!!,
There is an oil level plug, Small bolt !! , About an inch from the bottom of the case,
Take the primary chaincase filler cap off, And look down, The oil only wants to be high enough so the chain dips into it ?.