These are a free service but the gentleman has done this for years . you have a wealth of info at your fingertips do some planning BUY a manual(thanks recon). I hope you can use these but not required if you feel generous send 'em a buck or two. please note specific years for your machine. This is solely intended to help in time of need or perhaps quick reference.
*oil change
http://www.rockinhorseweb.com/motor_...or_trx450r.htm
*tranny oil change
http://www.rockinhorseweb.com/transm...e_for_trx4.htm
*cam guide
http://www.trx450r.org/forum/index.php?showtopic=51080
*clutch mod's
http://www.rockinhorseweb.com/Clutch_mod.htm
*cam install 04-05
http://www.rockinhorseweb.com/Cam_install.htm
*HRC power up kit install
http://www.rockinhorseweb.com/hrc_po...it_install.htm
*piston install 04-05
http://www.rockinhorseweb.com/Piston_Install_page1.htm
*Online reference materials TRX450r's
http://www.trx450r.org/forum/index.php?showtopic=51329