M12 bolt made from mild steel is weaker as axle of steering pivot.
After riding for 20 km, it is bent a little. That was repeated still riding to 1000 km.
So I had to improve the problem.
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The axle bolt on above photo is one After riding for 400km.
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Then I use rod end and bolt used with milling machine. MIG welding was used in this time. It's easier than arc rod welding.
We can see this way on :Steering pivot : open bike wiki.
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This operation was completed a day. MIG welding is speedy !
Then today's my riding.
Fini.
After riding for 20 km, it is bent a little. That was repeated still riding to 1000 km.
So I had to improve the problem.

The axle bolt on above photo is one After riding for 400km.

Then I use rod end and bolt used with milling machine. MIG welding was used in this time. It's easier than arc rod welding.
We can see this way on :Steering pivot : open bike wiki.

This operation was completed a day. MIG welding is speedy !
Then today's my riding.