Ducati 907I.E.Memorial Photo Museum

FLOOR B-15

Ducati907I.E. Percolation problem

Inside of tank is just like below;

1.tank
2.Fuel level sensor
3.Fuel pump (always on when Ignition switch on)
4.Degastor(?, separate fuel(liquid gasoline) and gas (bubble generated from gasoline))
5.Filter
6.Injector
9.Pressure regulator
a.Hose A
b.Hose B
c.Breeser pipe

Gas goes like this route;
Fuel pump-Filter-Hose A-Injector-Pressure regulator-Hose B- Degastor-Fuel pump

Why percolation happen?

Hot air from engine goes to throttle body (including injector), hoses, pressure
regulator,and air cleaner. If motorcycle stops, cooling fan starts and hot air attacks them.

How to fix, or improve it?

1.Attaching a heat insulator on the pipes, and on the back-side of tank.
It may work but can't be expected a lot. It may make percolation last longer after it,
because insulator prevent heat but also prevent cool air.
2.shorter the pipes According to construction, it will be hard.
3.Replacing a pipe from degastor(4) in the tank As you see, pipe from degastor
is too close to pump. Hot gasoline including bubble from degastor is easy to be pumped.
To extend a pipe from degastor will be a nice way to prevent a percolation.
(Though it is not a perfect) For your information, a triangle part may be attached on
the degastor from maker-claim.

The author of this article says;
The perfect one is prevent to raise temperature in the coul, not to do something after percolation.

Ducati 907I.E.Memorial Photo Museum