AndyAndyAndy
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Story behind it is, that previous owner converted this 50cc offroad minibike into 100cc by a bigger head (no idea if it ever run after this upgrade). When he was selling it he told me it starts (no idea if it's true).
Head says "97cm^3 KFM-8" (which is a head from 110cc motorbike). And body of engine says "1P39FMB" (which is a 50cc engine).
Well, it won't start.
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1. Carburetor looks like it's missing a screw? It's a threaded hole.
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2. It has spark.
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3. Trying to start it, carburetor intake actually blows air out. I was trying to put in there a rug soaked in fuel to get it started. And when I'm starting it, it will blow this rug out. Exhaust is blowing air out too though. Exhaust valve is opening/closing when turning engine and by touch it seems that it is set OK. (not too lose, not too tight) I couldn't take off intake valve cover, so I don't how intake valve is moving/doing.
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My first question would be about that carburetor. Is it missing screw, could it be it, why it doesn't start.
My second question would be about carb blowing air out/anybody would know how to check timing? Which mark at what/where/when? Guy said it run. So I don't wan't jump to conclusions to quickly, start tearing apart engine and reset everything. When maybe it's just badly setup carburetor or something.
Head says "97cm^3 KFM-8" (which is a head from 110cc motorbike). And body of engine says "1P39FMB" (which is a 50cc engine).
Well, it won't start.
-----
1. Carburetor looks like it's missing a screw? It's a threaded hole.
-----
2. It has spark.
-----
3. Trying to start it, carburetor intake actually blows air out. I was trying to put in there a rug soaked in fuel to get it started. And when I'm starting it, it will blow this rug out. Exhaust is blowing air out too though. Exhaust valve is opening/closing when turning engine and by touch it seems that it is set OK. (not too lose, not too tight) I couldn't take off intake valve cover, so I don't how intake valve is moving/doing.
-----
My first question would be about that carburetor. Is it missing screw, could it be it, why it doesn't start.
My second question would be about carb blowing air out/anybody would know how to check timing? Which mark at what/where/when? Guy said it run. So I don't wan't jump to conclusions to quickly, start tearing apart engine and reset everything. When maybe it's just badly setup carburetor or something.