Another bogging thread

[MasonMcD]

Howdy.

Recently got a Grubee/Black Stallion 66cc/80cc kit and got it up and running after a couple of days. Fun.

Now a week later, however, the engine is a much softer "pokka pokka pokka pokka" rather than the loud "brap brap brap brap" in the first few rides, no power, doesn't idle, just slowly dies, and dies immediately when I pull the clutch.

I've checked the plug, the fuel lines, I've disassembled and reassembled the carb, checked the seals, float, mixture, idle screw. Put the clip on the second groove.

The clutch is fine, everything seems fine. Maybe the actual engine is flooded? I'm going to try riding with the gas cap off, just to cover all the bases. Nope.

It used to idle. It used to run. It didn't used to die when I disengaged the clutch. What's up all of a sudden?

I know it's getting fuel. I know it's getting a spark (it runs for a while) and the plug is tan.

Ghaaaa!

[stv1jzgte]

Originally Posted by MasonMcD

Howdy.

Recently got a Grubee/Black Stallion 66cc/80cc kit and got it up and running after a couple of days. Fun.

Now a week later, however, the engine is a much softer "pokka pokka pokka pokka" rather than the loud "brap brap brap brap" in the first few rides, no power, doesn't idle, just slowly dies, and dies immediately when I pull the clutch.

I've checked the plug, the fuel lines, I've disassembled and reassembled the carb, checked the seals, float, mixture, idle screw. Put the clip on the second groove.

The clutch is fine, everything seems fine. Maybe the actual engine is flooded? I'm going to try riding with the gas cap off, just to cover all the bases. Nope.

It used to idle. It used to run. It didn't used to die when I disengaged the clutch. What's up all of a sudden?

I know it's getting fuel. I know it's getting a spark (it runs for a while) and the plug is tan.

Ghaaaa!

Start with it running and spray some wd40 around the intaket head and base of the jug if she idles up you got a leak. Check head studs are tight

[Junster]

I agree with STV most likely it's the headbolts.

[MasonMcD]

Where are the headbolts?

[bairdco]

those two things sticking out of frankenstein's neck...

sorry...

the four nuts on the top of your motor. around your sparkplug. DON'T overtighten them, or crank on them while your motor's hot.

[MasonMcD]

Originally Posted by bairdco

the four nuts on the top of your motor. around your sparkplug. DON'T overtighten them, or crank on them while your motor's hot.

Nah. Those were tight. How do you check if the engine itself is flooded? The float in the carb looks like it's doing its job.

[stv1jzgte]

whats ya plug look like?

[Venice Motor Bikes]

Make sure the wires to the CDI & kill switch aren't being pinched & grounding out on the frame or engine.
When you say it "dies immediately when I pull the clutch", makes me think its the wires. (i say this because I had a similar problem)
Also, get rid of the plug in connectors & solder & heat shrink the wires.

[Bikeguy Joe]

Replace the spark plug with a new, quality plug.

[zaviii]

Try increasing the idle in areas 3 and 4 see video. Sometimes you may have to adjust your carburetor settings from the weather changes.

YouTube - Motorized Bicycle Carb Tuning pt 2