火箭三R中气缸压缩为零。有人知道原因吗?

what ever you do don't worry abut the decompression system. lol
he said "However, when I open the throttle, it stalls."
to me this means it has a big vacuum leak in the hoses or a bad map.
what i have seen on burnt valve or a worn down cam lobe that it works bad at idle then when when revving it does not fall flat on its face. mostly just reduced power.
It doesn't shut down when you open the throttle, but sometimes it shuts down by itself.
 
I spent a lot of effort removing the outer casing today. I wish my fingers were as thin as chopsticks; the space is **** tight. I measured the valve clearance on the leaky side and it's 0.58. The pressure reducing valve moves freely without any sticking.
IMG_7775.jpeg
https://youtube.com/shorts/jn3cxFeRvVc?si=y5Tw5lzBl88Lafkx
I think I made a mistake in the measurement. I measured the clearance when the pressure reducing valve was working. This caused the valve to have clearance. That's why I measured 0.58. If I open the pressure reducing valve and put it in a non-working state, I try to insert a ruler with a thickness of 0.02. It can't be inserted. Because there is no clearance, the valve cannot be fully reset, leaving it in a leaking state.
 
Could it be a bent valve?
It's impossible to tell if the valve is bent. The only inference is that the valve can't fully return to its original position because there's no clearance. I need to remove the crankshaft so the valve is free of obstruction. If the valve isn't bent, it should close completely after removing the crankshaft.
 
It's impossible to tell if the valve is bent. The only inference is that the valve can't fully return to its original position because there's no clearance. I need to remove the crankshaft so the valve is free of obstruction. If the valve isn't bent, it should close completely after removing the crankshaft.
If the valve was bent then you would have a lot of clearance between cam and valve.
 
And he finds the problem and disappears without sharing the outcome. Ha Ha. Hope not. That's how we learn
I'm trying to find the real problem. Everything is speculation now. Adjusting the throttle requires a professional tool. You can easily buy it in Europe, but it's hard to buy it in Japan. I want to make this professional tool myself. I don't know if it's possible, but the prerequisite is to have the specific data of the professional tool, which no one has provided me.
 
I think I made a mistake in the measurement. I measured the clearance when the pressure reducing valve was working. This caused the valve to have clearance. That's why I measured 0.58. If I open the pressure reducing valve and put it in a non-working state, I try to insert a ruler with a thickness of 0.02. It can't be inserted. Because there is no clearance, the valve cannot be fully reset, leaving it in a leaking state.
Based on what he just shared about the exhaust valve having no clearance, the valve isn't closing even with the decompressor deactivated. He stated he cannot insert a feeler gauge. For whatever reason, the valve needs to be adjusted...

I wonder what the other exhaust valve measurements are? Are they all tight??? Did someone try adjusting the valves before??
 
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