You have still time to tweak your engine (with supercharging, hybrid boost, fuel injection, ...)
(Ride-on protects against sharp/pointed stones in the scree field near the top. And don't forget the neccessary ground clearance.)
I'll carry a towing rope and a shovel.
2-3 days each for approach and return:
https://www.google.de/maps/dir/Maastric ... m1!1b1!3e0
1 day for storming the summit:
https://www.google.de/maps/dir/Col+du+S ... m1!1b1!3e0
You won't be the only Dutch, remember http://www.lifeisjoy.nl/Stella-Alpina-NL.php