So after 11 months, i put in a real 5 hour trail ride on my stock 87 zilla.  Did great,  bit a few issues/ questions now.
Im running stock everything except billet washers/ wiseco piston.  Currently jetted with a 420 main and needle on the 3rd clip. Airbox lid on and riding at 1700 ft.  Bike didnt quite pull on top like i wanted, figured it was rich on the main, no biggie. Better safe than sorry.
Got home, pulled the plug, and yep, rich.  I never run airbox lids normally. Im thinking just ripping this one off and seeing how she runs with the 420. 
Anybody experimented with main jet sizing with box lid on/ off? All other variables the same? 
Also my brakes are in great condition, but they suck for aggressive trail riding.
Is there any benifit to replacing the front master cylinder with a current quads and keeping the zilla calipers n such until i can redo the whole front end?