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Piece of [@#$%&*!] Honda 2004 450

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check for burned or improperly adj valves . use stock jetting to 3000 ft.undefined

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check for burned or improperly adj valves . use stock jetting to 3000 ft.undefined

NOOBIE :D

Your second post was on something guys have been making fun of for months now...

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I would also bet that the valves are already back out of spec. I had the same problem with my '04 CRF450R.

You need to install the Kibblewhite SS intake valves and springs. The exhaust valves are usually fine.

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Have you made any mods to your bike? TrailTech Flywheel?

I have an 04 CRF450R in the shop right now with a run for 5 mins. or so, once warm a steady 1/2 throttle and the thing starts backfiring and dies. Has left me stranded now several times now. The entire ignition has been gone thru and it is now down to the main harness or the throttle position sensor on the carb.

This is the most unreliable motorcycle I have ever owned!! :D

Good luck!

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