2004-2005 Honda TRX450R Factory Sevice Manual, Page 104Get this manual
FUEL SYSTEM Check he hot start va lve fa ce fo score s, scratches
or wea rCheck the seal ri ng fo et eriorat ionwear or dam-
age Replace the hot start valve set if necessary
Install the hot start alv into the carburetor and tighten the valve nutTORQUENm (0.3 kgfm2.2 IbUt) Install the rubber cap onto the hot start va lve nut properly