Hey guys I bought a scooter for restoration and I’m completely clueless about that problem, that scooter I bought is a CPI Hussar JR 50 from 2002.
The CPI stood still for like 2 years I think, so as it, was the complete Fuel system rusty bec of the metal fuel tank.
So today I cleaned the whole system up. Old rusty fuel out setted a new fuel filter between that tank and the carburetor and new fresh fuel in. The sparkplug is completely black, so in that process I also cleaned that one too (new one is coming soon)
I changed the intake manifold to a new one and I changed the membrane block aswell because everything was dirty, rusty and porous.
For now I didn’t check the engine yet, tomorrow I will do a compression test and take the head apart to take a look at the inside.
Maybe someone knows something more about that problem.
Thank you guys for ur help!