2003 Yamaha YZ 450 F "hot" Questions

hot start stuck bike starts, runs then the exhust gets real hot Not good firs to plugs. When exhaust hot the fumes ignite better. Check plugs and coil.

hard to start backfire and gets hot quick but ran its a 2004 450 yzf hard to start backfire and gets hot quick!!!! but ran great when parked?? ive had a few little misshapps in the last week it was ...

red hot exhaust pipe Hi, Anonymous a YZ is a motocross bike designed to run flat out that being said if you are strolling down some scenic trail at a slow pace or letting the bike idle for a few ...

...great when cold. As soon as it warms up it begins to pop and bog and backfire. As soon as it is hot, it stalls. I have to wait until it cools down to restart it. I have cleaned the carb, checked ...

...day we started it up and ran it for about 30 min. and we noticed that the exhuast pipe was red hot and melting the plastic air filter case... Any thought as to why? This has never happened

bike runs ok untill hot, spark weak.. ..tested coil,stator, neutral switch etc...all in spec to manual I would still replace the stator.

EXHUST DOWN PIPE GLOWS RED HOT AFTER BEEN RUNNING FOR A FEW MINITES Perfectly normal mate, a 4stk will boil if you leave it ticking over for any length of time.