21-03-13, 02:06 AM
Ccommon problem usually made by people who have no idea what the screws are for. On many of the older pre vaccum type carburettors the screws controlled the air setting not the fuel setting and were set to 2.5 to 3.5 depending on the model of bike.
Normally if the screw are on the air box side of the carb they control the air and on the engine side (like the fazer) they control the fuel
Take them down to 2 and work from there. Make sure your air filter is clean and clean up the plugs if you cannot afford new ones. Soak the plugs for about 15 minutes in petrol and then brush off any soot deposit with a stiff tooth brush and they should be ok for testing. Start it up, take it for a spin and get it good and hot. Should be a big improvement when you come back. Now balance the carbs set the idle and finally set the TPS
Normally if the screw are on the air box side of the carb they control the air and on the engine side (like the fazer) they control the fuel
Take them down to 2 and work from there. Make sure your air filter is clean and clean up the plugs if you cannot afford new ones. Soak the plugs for about 15 minutes in petrol and then brush off any soot deposit with a stiff tooth brush and they should be ok for testing. Start it up, take it for a spin and get it good and hot. Should be a big improvement when you come back. Now balance the carbs set the idle and finally set the TPS