49cc 142F HS Air Breather Blow Back Issue

I have a 49cc China mini bike and I was looking at valves and when I took the bottom cover off oil and gas fell out..like not a lot but still way to much the valves won’t budge when I try and move them by hand. Reckon that’s why I have spark but can’t get it to start?
Do you have a picture of what we are looking at?
 
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