2004-2005 Honda TRX450R Factory Sevice Manual, Page 48Get this manual
MAINTENANCE
FUEL LINE
Re move th rear fe nd Ipa qe 35 Check th fuel line for et riofOti md.1 mage lo, kaq Rep lace th fue line ,f noccry
THROTTLE OPERATION
Check fo ny dete rioration dam on he th cottie C"h le Checlth th ro ltle le ver tor oo th o""ra tionChe cl th ," the th ronle opens nd outo ma tieally 0I0 5es in al leerin po, it io n" If th th ro ttle leve does no return properly, lub ricate he th rott le cahle and ove rhaul nd lu hrioat th thrott le hou, innIf he th rottle le ver sti ll doe not ret urn prope rty, 'epl8oe th Ih ronle cableW ith the eng ine idlinntur tI'e handl ebar all he way to th right and left to n" re hat the id le peed does not changeIf idl POed inc'ea se sche ck the th rot lle lever fme ptay and th thmtt le C"h le co nnect ion Me ure th hrott le leve Ire loy at he ip of th th rott le le ve L