Here's a daft one I have encountered a few times during the past thirty years. Some owners like to tidy up the carb rubber pipes. They connect the two pipes which vent the float bowls thinking it enhances balance. This stops or retards fuel supply to the float bowls because the breather pipes are no...

Fitting appropriate jets is sound advice until you add the four into one pipe. Some work well without too much tweeking. Others are problematical. Do not get bogged down with main jet substitutions and needle heights. All problems go away when air constrictors are installed in the air bleed hole to ...

Hello Rick....My first post was aimed at folk trying their best to remedy difficult and vexing carb snags. I am not expert at everything but you might try pointing an infra red beam at the four header pipes. This will indicate which cylinders are hottest and coldest. Be warned, infra red does not li...

The following facts may help those who experience "makes no difference" when adjusting the pilot mixture screw. Inlet valve opens, piston descends creating depression. Say -15. Atmospheric pressure,say +15. Slide closed means air is drawn through the bell mouth opening to the pilot jet and...