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Full Restoration Honda CB400 - 1994 Timelapse!

Apr 30, 2024
This is a

1994

CB400. It's also a motorcycle that kids dream about. And I am no exception, I am captivated by it. Now let's take it back to the garage. Back in the garage, I measured the cylinder pressure. It is less than 6 in terms of cylinder pressure. For parking reasons I tried to remove the carburetor and clean it. To see if we can get it running smoothly. You can see the bright green antifreeze and patchy red sealant on the crankcase. Indicates that it has been reconditioned. You can see the combustion chamber of the third cylinder. It seems that the valve was already broken.
full restoration honda cb400   1994 timelapse
And repaired. The walls of the second and third cylinders are clamping down. It seems there is a big project ahead. Upon opening the crankcase, the main bearings appear to be fine. When I removed the connecting rod from cylinder 2, I discovered that the bearing had rotated. Fortunately, the crankshaft appears to be fine. Repairing this engine will require a lot of effort, with valve leaks, center cylinder noise, spinning bearings, and more. But I have enough time to bring him back to life. To inject some soul back into it. Now I'm marking the upper bearing shells. And I will measure the valve leakage using the most primitive method.
full restoration honda cb400   1994 timelapse

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full restoration honda cb400 1994 timelapse...

None of the 16 valves are leak-free. They all have different degrees of leakage. This clutch cover has been repaired before. Watching it triggers my OCD again. This time I will need outside help. I am quite satisfied with the result. While cleaning the valves, I noticed that the valve faces were very worn. Replace it. Now, most of the pieces are clean. Next comes the valve grinding process. This step will consume most of your time. During this process, you will have to use several angle grinders repeatedly. To get the best surface. The valves are already installed. Since the valves have been reground, we next need to readjust the valve clearances.
full restoration honda cb400   1994 timelapse
Install the camshaft and tighten it. Measure the clearances of the 16 valves with a feeler gauge. Then choose the appropriate shims and reinstall them. After half a day of work, it is finally tuned. Next, measure the crankshaft bearing clearances. If everything goes well, we can start riding. You can see that the crankshaft bearings have some wear, but it is within an acceptable range. I'll be working overtime tonight to assemble this engine. The engine is now

full

y installed. Now we are going to add a little oil. Check if the oil circulation is working properly. Oil is going up.
full restoration honda cb400   1994 timelapse
Install the valve cover. Now, let's measure the cylinder compression. About 12 on all cylinders. It seems that the efforts of these days have borne fruit. Install the carburetor. We're about to start this four-cylinder engine. The engine has started success

full

y. The next thing is to completely disassemble the frame. The entire vehicle has now been dismantled. You can see that these pieces are in terrible condition. Fixing them will be a huge project. But I have time. To restore each component. Now let's make the most of our time. And paint the engine in your favorite black color. Next, let's prepare the frame and its small parts.
Next, paint the fuel tank in the classic red and white scheme. Spent countless days and nights and finally restored it almost to its factory state. Every part is full of memories. Everyone has precious memories. And my story began the moment I first saw it and it is far from over.

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