when i did mine i read in verses that there were 2 drain plugs for the cly. heads. so i misunderstood and thought there were 2 plugs for each head. WRONG!!!! so i go looking for 2 bolts and see 2 bolt heads on the rear head and i think those are them. now mind you i just removed the drain plug on the bottom of the block and knew what it looked like and the 2 i am now looking at are so much different. but i saw two of something the same and thought (wrongly) that those were the plugs even though they were much larger than the bottom plug. so i start to loosen one of the bolts and that little voice in my head (the one i usually blow off) says to me "STOP!!!!!!!!!!", which i did without hesitation and re-tightened the bolt with a sense of urgency. good thing i did because i went to my clymers book to find out i was removing the upper cam arm guide bolt. that would have sucked major league. so to make a long story short, make sure they are drain plugs your removing (they are small) and on the bottom half of the cly. heads ( ONE for each head, not two, duh).
well the bike and i survived me draining the cooling system and the cam arm is still where its suppose to be & the engine temp is in the normal range.
do have to admit, i was holding my breath and starting to pucker when i 1st started the engine after that episode, thinking my cam arm guide might be floating around in the block.
so if i could do it and all is well, then anyone can do it. but i do sense my bike gets a little nervous when i am walking towards it with a tool in my hand and after that maintenance adventure, so do i. LOL.
ride safe, john