Hi team, I'm new in thsi furum, I'm building a f4 powered kart, everything is done, I'm was plugging the fuel lines, but I don't know where is the return line. If somebody has a couple of awnser, i'll manage to fix it.

Is the oem f4 pump running all the time ?
If not, where is the switch/regulator ?
If there is no return line for the system, where does the fuel goes, does it just drops down from the carbs or goes back to the tank ?
What is the fuel pressure required ?

If anyone had a fuel line shematic or can tell me where to get it, it would be appreciated.

It seems very simple but I want to know how the fuel is routed :

Tank -> filter -> pump -> carbs -> ? (carb out to tank - or no exit, pumps stops with a switch)

By the way, I have the shop manual for the 99-00 F4.

tkx,

 

If you pm me your email address i can send you a .pdf file with a load of stuff on the fuel system for the F4 that might be of use to you