Well I thought it was easy... I read through the section on removing the air filter in my Clymer's manual & had a good look at the parts sheet from www.realoem.com. It sounded straight forward. Well, I thought the part in the manual about removing the starter cover was a bit odd; when I read the section on removing the starter, the first instruction was to remove the air box housing. A bit circular that: to remove the starter, first remove the air box housing then the starter cover but to remove the air filter, first remove the starter cover then the air box housing. Sigh... So. Following most of the manual, I removed the L/H carb induction tube, plugged the carb, removed the screw holding the halves together & presto! It didn't come off! Part of the problem is that the I'm not sure how to remove the crankcase vent line from the housing. In my manual, there is absolutely no mention of removing this line! Which has landed me once again in the gentle hands of this forum. I'm thinking this can't be brain surgery so I am obviously missing something. What is it? As a side question, can I damage the diode board if I pull the starter cover w/o disconnection the battery? The manual is a bit nebulous on this. Thanks!