China girl acting like its seized/has too much compression

I've been going through the forum and haven't seen anything quite like this.

So I've had my bike out for a couple runs now that the weather is nice, it's a 66cc china engine and it's been running great. After my last run I gave it some lube, greased the chains, a little wd in the control cables to keep them nice and a little lube on the crank gear (not on the pads).

Now today I went to take it out for a spin and it is extra hard to start, couldn't actually get it going. When pedaling when I release the clutch it feels like the compression has gone way up or that its partially seized. I tried taking the plug out and the piston moves freely and smoothly, doesn't feel like its binding or sticking anywhere. It's a stock engine, no high compression parts or anything. I also sprayed some cleaner down the exhaust, doesn't seem to be clogged Carb is also clean.

So I was wondering if anyone had any ideas why it would take over double the effort to pedal to get it starting?

I know that they will get more compression as there worked in but this is a sudden increase. Last ride was fine easy enough to start now it has so much it will barely turn over.

I checked to make sure the clutch was working fine. The rear tire isn't skidding but since my last run and now it feels like the engine has gotten more compression or that its dragging, just stiffer by a large magnitude. but with the spark plug out it cycles fine. I also had the head off and cheeked in the cylinder There's no signs of scoring or burning or anything. It's got me completely stumped. I've checked everything I could think of.

Clutch isn't slipping, chain rolls easily, back tire spins freely, engine turns freely without out plug, exhaust doesn't appear to be clogged, Carb is clean, plug is normal.

Also 2Door I am getting it up to speed for starting it.

It will turn over but it takes a ton of effort. after getting up to speed and even standing up for maximum effort its so stiff to turn over that it will slow to a stop in about 5 foot that is with the plug in with it out it turns over just fine. Also Legwon I didn't think of checking the crank case. to see if it was flooded I'll do that tomorrow. its raining today.

Also I will try starting with out the muffler on just for due diligence, wont run it with the muffler off just to see if I was wrong when I checked it.