Being a newbie owner of a 99' YZ400F I need some help in reducing the preload on the rear shock to lower the bike a bit. I'm 5'7" and the bike is too tall for me. I do mostly trail riding no MX very little jumping so not as worried about travel. My question is how do I get a spanner wrench in to loosen the top spring nut. The lock nut was easy . . . one quick tap. Do I have to take the air box assembly out to access the spring or what. I have the bike raised so there is no pressure on the spring but short of using a long screw driver and hammer to back the nut off, I'm looking for suggestion. Thanks in advance . . . This forum has been very helpful in the past.