THIS MAY REQUIRE YOU TO FIT A NEW THROTTLE CABLE ON YOUR TRX90 IN ORDER TO USE THIS CARBURETOR!! THERE IS A CHANCE YOU WILL HAVE TO USE THE THROTTLE SLIDE CAP OFF YOUR OLD CARBURETOR. WE HAD TO FOR OUR 79 ATC110. YOU ARE BUYING: 1 new aftermarket high quality carburetor. Comes with fuel filters, Fuel lines, Fuel hose clamps. THIS CARBURETOR FITS HONDA MODELS: - 1993 to 2014 TRX90 Four Trax (THIS MAY REQUIRE YOU TO FIT A NEW THROTTLE CABLE ON YOU TRX90 IN ORDER TO USE THIS CARBURETOR!!) - MAIN JET IS: 78. - IDLE / PILOT JET: 32 PLEASE MEASURE YOUR OLD CARBURETOR COMPARE TO THAT BELOW: - MOUNTING BOLT HOLES ARE 48 mm CENTER TO CENTER. - AIR BOX SIDE FITS A 40 mm BOOT / TUBE. - HEAD SIDE OF CARBURETOR IS 22 mm INSIDE DIAMETER. YOU MAY HAVE TO CHECK RE-JET THIS FOR YOUR BIKE DUE TO CIRCUMSTANCES / MODIFICATIONS OUT OF OUR CONTROL, SUCH AS: - YOUR ALTITUDE / ELEVATION - EXHAUST PIPE - INTAKE SYSTEM - ENGINE HOP-UP / BIG BORE KITS - STROKER CRANKS - MODIFICATION WORK - HEAD WORK (PORT / MILLING / VALVE WORK / ETC...) WE HAVE INSTALLED ONE ON A 1979 ATC110 IT RUNS OUR MACHINE GREAT, BETTER THAN THE STOCK ONE DID. WE HAVE THIS IN HAND RIGHT NOW TODAY. WE SHIP VERY FAST. BUY HERE WITH CONFIDENCE.