Kymco 50 4t no power

[Ketavo]

I just got a kymco people-s 5t and we tried everything, new plug new air filter clean carb, new carb, all the transmission parts, adjusted valves, checked ignition, checked compression, we checked everything and came out ok no apparent issue there but still no power, I ran out of ideas I would appreciate any suggestions, bike will start normally and run very slowly may reach 30 maybe 40ks and going downhill maybe 50ks if I'm lucky if going uphill it won't go over 10 I am just 140 pounds please help and thank you, bike has 5000 ks and it is a 2008

[tortoise]

Insert a plastic drinking straw into the sparkplug hole and verify flywheel indication is aligned when piston is at TDC.  Sometimes the flywheel-crankshaft woodruff key will shear and alter pulser coil timing.

Test ignition coil and pulser coil Ohms with a multi-meter . . section 15 of service manual.

Any chance the muffler is obstructed with rust, carbon, or nesting insects?

[Ketavo]

Thank you I will be getting a multimeter from a friend tonight or tomorrow to check that, and also we cleans the exhaust and tried a different one and no change, i will try to check the flywheel mark I don't know much about how to do it but I'll do my best and I let you know thank you

[Ketavo]

How would I fix the problem,It seems it is not exactly aligned I already checked, thank you