The rear fender isn't fit to the rear tire. I had thought using 451 wheel. But now I can decide 406 is enough.
I cut some stays too be short and the other stays got slit to bend.
I use mig welder.
Then, I rode it. I felt a little less resistance of air and top speed was 47.2km/h on flat road.
The stability becomes unstable, coz the seat bend more.
I'm going to train to control it.
Fini