2006 trx350 fm no top end

[kram2112]

ran like a beast. sat for a couple of years. New cheap petcock, tank wash and cheap carb. bogs half throttle. 300.00 factory carb and the same. moved the needle no help. all new vent lines and battery. wouldn't think yhe timing should change. 

[rgeiser]

did you put all factory air box pieces back in? honda is terrible about messing with the airbox.

[Mech]

So bogs and then just stays the same, struggling to go faster ? Or does it start dying out.. Actually get slower.

Have you checked the fuel is coming right to and through the carb fast enough. You could open the drain bung on the carb and make sure it keeps flowing after the bowl has drained.

Have you checked the exhaust isn't blocked.. 

[kram2112]

will check pipe. pulled the line at the carb. flows fast. drained smelly fuel again and trid fresh ng. bought a coil and cdi box . will try this week end. thanks  for the help.

[Gwbarm]

Wow you have done a lot , it does seem like fuel delivery but you have changed all that, so your on the right track maybe CDI is not advancing timing enough to keep up.

[Mech]

Undo the carb drain bung and make sure the fuel is getting right through the carb. Just because it's getting to the carb doesn't necessarily mean it's getting into the carb.

Have you tried a new spark plug. It could be as simple as that.

And what about this question ...

"So bogs and then just stays the same, struggling to go faster ? Or does it start dying out.. Actually get slower."

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[kram2112]

great thought didn't think of that could be something in the needle valve. got too cold around here lately. will try soon. does not die out just can't go higher than maybe 2k.