I repaired the reverse control handle lever and it goes into reverse just fine. Lifting the shifter will let it easily go into second gear but pushing the shifter back down goes into neutral but will not go into first. It acts like it has no 1st gear. Does anyone know what is happening and how to resolve this?

So I've read through your post two times from last year, and eyed the pictures a bunch.  Did you reuse the camshaft and tensioner on that machine?  Also, did you find that the timing was off when the oil pump chain jumped off?  

Another issue with these automatic Honda 400's is the centrifugal clutch which controls engagement. When they are worn out and slipping they affect shifting since the computer senses a problem.

Hi, welcome to the forum Do you still have the old speedometer? If you do, then, the data should still be present on the chip unless it’s corrupted and I can swap things over for you to put original mileage back on the wheeler I’ll send my contact information to your message box -AKATV      

@rich250rracer, my laptop went down and I am now limping along on my backup/spare laptop. So until I get a new laptop up and running and get my data copied over I'll be out.... hopefully someone can help ya in the meantime. As for my situation it's gonna be a long haul, likely a month or longer. Wish ya the best!