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Thanks for the encouragement

I had a chance to ride the bike today for 7 miles so I could  check the plug.  It is not white but still lean,  the tip is without any residue whatsoever,  and it is metallic grey.  Given,  that the screen,  even though cleaned will somewhat restrict the flow, something else needs doing too,  I guess the next in line is the injector. If that doesn't help,  then I guess sensors.  The reason to buy an injected bike was to forgo fuel line problems,  what a naive tosser I am

Not familiar with that gas cap. However, if opening that cap makes no difference in your problem then that vent is not the cause. Where are you in relation to Gyor? Peter Kapitar (Arrow76) lives in Gyor and rides a Downtown 300i, is very smart and knows some very smart people. Please keep posting each step you take in solving this problem.

Hi Crossbolt,  thanks again...  I have taken the fuel pump out of the tank,  the strainer on the bottom is black with rubbish.  I did try to clean it with carb cleaner and soaking it in kerosene,  a lot of the black stuff came out,  but it is still full.  I should havr but did not try to put the pump back in without the strainer to see,  if that helps,...  Long story short,  this cleaning did not help.  The pump is a Quantum one,  and I'm pretty sure that a lot of other bikes use this setup,  but did not succeed to find a suitable replacement filter.

The release valve in the cap is free of debris (it is as I thought a ball bearing without a spring just resting on the hole,  I guess if the pressure would build up inside,  that would push it up) ,  started the engine with it open,  it did not change a thing. Also thanks for telling me about Peter,  I will get in touch,  as I'm sure he knows,  where to source Kymco parts in these woods

Dear all!

First thank you for letting me in I have just bought a 250AFI Xciting, imported from Italy. The odometer says 25000 kilometers, the outside is nice and she was running fine on the test run, but now I start to see, why people tried to tell me, not to buy an imported bike from a dealer, poor bike has got rust everywhere underneath the tupperware and the engine was most likely neglected all it's life. Every rubber part or hose is hard as a rock (is this a Kymco ailment, or the seaside air hardened everything, whilst rusting the metal?). Now I have changed all the fluids and the main air cleaner, and the spark plug. Whilst replacing the plug, I have noticed, it is completely white, e.g. running very lean, but I did not pay much attention to an old plug. Upon replacing it with a brand new item the bike is still very lean, and as it is not a carbed bike this should be impossible, right? Also with a carburettor bike I would simply enrichen the mixture, but here I do not have that option. I did spray some brake cleaner on the air intake boots of the throttle body, air filter box, etc. checking for leaks (this used to work on carb leaks), but there is no change in pitch, so I guess the vacuum is good. Also this cold spell made the bike start extremely hard to start - meaning 20-30 cranks with no luck, this happened with the new plug, the fuel pump is pumping all right, but I wonder, if I have low fuel pressure? If I prime the engine with the kill switch and waiting for the fuel pum to pressurize 3 times, the bike starts nearly immediately. If I do it twice, I need to crank even a hot engine for 5 seconds, again with only one prime I am looking at long crank times. I somewhat hoped, there is a clogged fuel filter, but there is no fuel filter on the fuel hose leading from the fuel tank (and pump) to the injector. Also strangely enough even though the bike is running ultra-lean, it still smells of unburnt petrol and my fuel economy does not seem to be that great (I do not have a large enough sample, only one fill-up, with 50 or 60 km's with the old clogged up air filter, so I suppose this does not count).

Any idea, what should I check? I disconnected every connector, I could find, sprayed contact cleaner on them, resetted the sensors (with the 8 second full throttle thing), no change...

Thank you!

Regards,

Gabriel