Having stripped my 750 into a million parts the weekend and
with the help from my son to remove the engine decided to take the breather casting off
seized up front screw,the only one i have come across during the strip.
My son showed me a great way to remove it.
Drill a hole in the top 2.5mm dia or so ,tap a torx bit into the hole,attach
ratchet handle and hey presto out it came.
Might be of use if you get stuck.
Good luck Richard
