Why does my motorcycle bog when I open the throttle fast?
When the bike is at an idle, it will bog if you open the throttle all the way to fast. It is still rideable but sometimes when it happens it is always at the wrong time. My plug is lightly oily and black.
What happens when you punch the throttle on a Honda BF90?
Punch the throttle on the BF90, and the motor gets a big gulp of air. There’s a split-second lag as fuel is drawn through the venturi of each carb, and it then has to travel all the way down the intake runner. By then the motor is starved for fuel and dies.
What causes a Honda BF90 bog boat to die?
That old motor suffered from what I’d call a “lean bog,” a flaw in the carburetion that could cause the motor to sputter and die when the throttle was advanced quickly from idle speed. This could happen when the owner was simply trying to punch the boat on plane, or when a boost of throttle was required to push the boat onto a trailer.
What should the Revs be on a Honda BF90?
Get the revs u p: “The BF90 needs to be propped to run 6000 rpm at wide-open throttle, and that’s with a full load of fuel, gear and passengers,” said Jacoby.
When the bike is at an idle, it will bog if you open the throttle all the way to fast. It is still rideable but sometimes when it happens it is always at the wrong time. My plug is lightly oily and black.
Punch the throttle on the BF90, and the motor gets a big gulp of air. There’s a split-second lag as fuel is drawn through the venturi of each carb, and it then has to travel all the way down the intake runner. By then the motor is starved for fuel and dies.
That old motor suffered from what I’d call a “lean bog,” a flaw in the carburetion that could cause the motor to sputter and die when the throttle was advanced quickly from idle speed. This could happen when the owner was simply trying to punch the boat on plane, or when a boost of throttle was required to push the boat onto a trailer.
Get the revs u p: “The BF90 needs to be propped to run 6000 rpm at wide-open throttle, and that’s with a full load of fuel, gear and passengers,” said Jacoby.