How do you adjust the governor screw on a Baja Doodlebug?

Answer 1

There is no "governor screw" on a doodlebug. There is a throttle stop screw. If you look at the side of the carburetor you will see a small screw with a spring around it, back that out until the throttle lever no longer touches it when the throttle twisted grip is at full throttle. That won't give very much of an improvement though, because the real governor is still working. To bypass the governor, which limits the maximum revs of the engine you need to go one stage further (which will almost double the top speed of the bike). When you turn the throttle you will see that the cable pulls on a small lever behind the carburetor. If you raise the rear wheel of the ground (so that you can rev the bike without it moving forwards) you will see that when the engine reaches roughly 3600rpm the governor engages. You will see that there is an arm connected to a shaft that comes out of the front engine casing just below the carburettor. That is the governor. That is directly connected to the carb with a long thin steel rod. When the engine reaches 3600rpm that rod closes the butterfly on the carb, restricting the maximum revs to 3600rpm. You need to bypass this mechanism. Attach the governor arm to the throttle arm with a zip tie. This will stop the governor arm from engaging. The engine will rev to about 5300rpm (it's natural limit) instead of 3600rpm. You will see a corresponding increase in your top speed. If you search YouTube you can find a video of someone doing it to a mini Baja 6.5hp. Although the engine is a slightly different design, the governor works in exactly the same way. On the Doodle bug the governor arm and throttle arm are located vertically on the front of the engine, on the Baja Warrior/Heat/MB200 it is horizontal, but it works in exactly the same way. Search for Baja Warrior Mini Bike Easy Governor Bypass. There are several different videos showing how to do it, from using a piece of wire to using a zip tie to using a fishing line to do it. They all do the same thing though. They are all for Baja Heat/Warrior/MB200, but as I said, they all work for the Doodle Bug too.