49cc 4 stroke stalls and blows smoke out of intake

[Chainlube]

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Looks like it to me, the motor is a gxh50 from a 2010 post and you can see the gov has been mounted in the same place as the huasheng "timing gear". The sidecover is still on and he removed the flywheel side case cover.

You're showing two different gears, your second picture is a gov. The first one looks like an advance.

 

[Will'smotobikes19]

You're showing two different gears, your second picture is a gov. The first one looks like an advance.

No if you look at the picture below the first 2 (my picture) it has a cupped shape on top the one in the 1st pic is upside down it's the same thing as in the 2nd picture without plunger and flyweights. I can't see why they would put an advance gear where the original honda governor goes on the clone. Ran good until I took the sidecover off. I was just checking what the internals were and tapping the side bolt holes on mount. If you look at the first pic of the "timing gear" you will see 4 rectangular holes that could hold those flyweights.

 

[mark20]

Have you tried talking to it nicely? Maybe its relationship with the side cover might be non EPA complaint

 

[Will'smotobikes19]

Well the gentleman from california can have his under 4hp engine unless I figure out the backfiring through carb.

 

[Will'smotobikes19]

The 2 side bars on beach cruiser frames must be so you can't adjust your valves. I have noticed before if the rocker has any pressure on the valve it can throw off valve timing. The intake looked like it was pushing down a little compared to exhaust which was higher. Torx bits and a wrench might work and an 8mm box wrench

 

[Chainlube]

The 2 side bars on beach cruiser frames must be so you can't adjust your valves. I have noticed before if the rocker has any pressure on the valve it can throw off valve timing. The intake looked like it was pushing down a little compared to exhaust which was higher. Torx bits and a wrench might work and an 8mm box wrench

If your engine is at TDC both rockers should be loose a tiny bit, a small amount of wiggle room. If either(ha ha intake in your case) is tight then it won't close all the way and let A/F out and back down the carb.
Did you disturb either of the bolts on your coil?

 

[CrazyDan]

The intake looked like it was pushing down a little compared to exhaust which was higher.

You might have put your cam in correctly, but as chain said, you adjusted your valves outside of tdc.

 

[darwin]

Another remote possibility is if the keyway on the crank sheared even just a little it will throw timing off.

 

[Chainlube]

Another remote possibility is if the keyway on the crank sheared even just a little it will throw timing off.

If the key broke the timing could be anywhere.

 

[darwin]

Probably not your issue. Ever see a keyway sheer just enough where just a fraction of the key is still holding onto the bottom half? Takes a torque shock to totally separate it.