Thanks to all for a great site

Can you please HELP me figure out what to do.

I am an idiot when it comes to this stuff so please bear with me!!!!

I just bought a mini sand rail it has a busa bullet bike engine in it with an 85 honda accord five speed.

I do not shift the honda trans on the fly, I just put it into a gear and use the busa to shift.

First trip out I lost second gear on the honda trans.

My question is, is there a stronger honda trans with the same spline and shift tube design.

Thanks so much for your time. Please help an old guy out!!!!!!