I'm having some trouble removing the flywheel on my motobecane mobylette. In the manual it doesn't mention using a flywheel puller, since the flywheel is retained by a threaded cap with a square hole in the centre. It says to lock the flywheel by placing a bar through the connecting rod and support the bar with wood blocks, then use the stock from a 3/8 drive socket in the square hole of the cap. The cap is a left hand thread which i think means turning it clockwise to loosen it. Am I doing something wrong or is the cap just on really tight ? Can I use wd40 somehow to loosen it ? Any suggestions are appreciated.