1987 Honda Fourtrax TRX 250X Service Manual, Page 51Get this manual
FUEL SYSTEM Install new a-rings on the float chamber Install the float chamber to the carburetor bodyaligning the overflow pipe with the cutout in the baffleTighten the four float chamber attaching screws
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THROTTLE VA LVE SYNCHRONIZATION
Close the butterfly throttle valve fully Make sure that the piston throttle valve is closed fully and there is no clearance between the throttle link and the piston throttle valve shaft arm