Reply To: Just got my hands on “new” bike and I need help – GT250
Doo a deep dive in your area to find any wrecked 250 EFi, they would be great for parts. Daewoo uses an OEM black pump that has a different pressure rating (harder to find) , Delphi pumps are OEM Blue and have OEM numbers printed on them. airbox EFi has port to slot in the ISC valve (idle speed controller) , and it sends 2 air pipes down to the throttle bodies. The pump splits 1 fuel pipe in to a T-Piece which joins 2 smaller pipes feeding either injector (front + rear )
Okay, but what about the return line? I cant figure it out. Thanks a lot!
have to see what your setup looks like, not all needed and it’s complicated to give a straight answer due to differences between the older and newer pumps and wether the past owners have made modifications to the fuel railing systems such as using a Kemso aftermarket pump or changes to the pressure relief valves on the pumps.
The older black pumps had different pressure ratings and had 1 pipe ==2 pipes ==then single pipe down to the frame == then 2 final pipes to either throttle body where the injector is.
Most of the time , you will see a single hose leaving the pump going to the middle section of the bike frame. It breaks off in to Front Pipe and Rear Pipe after that junction. The 250 is a little less complicated than the 650 thankfully.
You will deal with more air pipes for the throttle bodies , air lines from airbox to Electric Valve Pump which sends even more air down the exhaust pipes (emissions control) (Some bikes out of UK actually have far more , like the american versions for some kind of extra emissions control) , more pipes from either engine cylinder going in to the airbox etc.