I don't know about the 1050 but on my 2014 1000 I was never able to remove the front cylinder plug without removing the radiator altogether. I think on the older vstrom's you can just remove the plug without taking the rad off. Of course the tank and side plastic's must come off to the reach the rear cylinder centre spark plug. The side plugs are easy to get to with only the seat needing removed.
A 14mm spark plug socket or a 14mm long nosed socket will do the job.
You should have no trouble removing them, they might feel tight the first turn or two till the carbon comes off the lower threads.