starving for air

[yellowquadracer]

Problem is the only way the quad has power is if I disconnect tube that runs from the air filter box to the end of the carb. Other wise the quad just bogs every time I push the throttle. Changed out jets and clean out carb did not help.
It seems to get enough gas but not enough air, any ideas.

[zwark]

is your air filter dirty? stuck float? did do any recent modifications?

[yellowquadracer]

Clean filter, float looks like it is working fine. Quad worked fine until started doing some jumps. Then quad starting acting up.

Rebuild top end new piston, ran 150 laps at track worked great, two weekends later started having problems.

[yellowquadracer]

Anybody have any ideas

[Wheelie]

What mods do you have? What jets are currently installed?


How does the machine run under a load?