SEE MEASUREMENTS BELOW. QUITE POSSIBLE YOU CAN NOT USE YOUR STOCK AIR BOX WITH THIS CARBURETOR!! SEE THE MEASUREMENTS BELOW. 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 carburetor. Comes with fuel filters, Fuel lines, Fuel hose clamps. THIS CARBURETOR FITS HONDA MODELS: - 125 cc BIKES (SEE MEASUREMENTS BELOW) - 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. THE COIN PICTURED IS FOR SIZE REFERENCE ONLY, IT IS NOT FOR SALE AND IS NOT INCLUDED IN ANY PURCHASE EVER.