No compression & no fuel on Kymco Grand Dink 50s 2007

[HeartlessShadi]

Hi,
after a crash my 50ccm didn't run so I started testing in the usual order, checking for spark and compression as well as fuel. Spark seems to be fine, tested with a different spark plug too. Compression is around 40-50psi, way to low. There is no fuel passing through the fuel filter, but even with fuel in the carburetor or even directly injected into the cylinder it doesn't want to start. I've replaced the seals on the head and the cylinder and resurfaced the mating surfaces as well as replaced the piston rings. The carburetor is new as the old one was not functional anymore after the crash. It cranks over like it should (starter is a bit weak, but that was already the case before the crash.)

 

[Alan]

Low compression and no fuel together usually means an air leak or timing issue. You can double-check reeds, seals and timing.

 

[HeartlessShadi]

I should specify that it's a 50ccm 1 cylinder 2 stroke engine, so timing is definitely not the problem. Because it's a 2 stroke, low compression should mean something on the upper end, Cylinder Head, Gaskets, Piston rings or something else up there. But I could be mistaken, that's why I'm here