Post by dickyh on May 17, 2017 8:26:26 GMT -5
I recently removed an aftermarket EFI and went back to carburetor... The EFI had an electric fuel pump of which when I installed, removed the vacuum petcock and installed a fuel shut of valve.
Now that I am using a carb I have the fuel line connected directly to the carb. Everything seems fine except when increasing throttle under load I feel a surging or pulsing. The carb i put on has a #105 main jet which I suspect is too small (and planning on a #115 or #120), but I am wondering if the absence of the fuel pump is really the culprit. I always thought is what just a safety device that stops fuel flow when the engine is not running.
As a side note: this scooter also has a performance exhaust on it, as the OEM muffler broke and could not find an oem replacement. With the EFI the scooter always ran a little on the rich side.
Any input would be greatly appreciated...
Now that I am using a carb I have the fuel line connected directly to the carb. Everything seems fine except when increasing throttle under load I feel a surging or pulsing. The carb i put on has a #105 main jet which I suspect is too small (and planning on a #115 or #120), but I am wondering if the absence of the fuel pump is really the culprit. I always thought is what just a safety device that stops fuel flow when the engine is not running.
As a side note: this scooter also has a performance exhaust on it, as the OEM muffler broke and could not find an oem replacement. With the EFI the scooter always ran a little on the rich side.
Any input would be greatly appreciated...
