My old Honda 185s three wheeler when I was younger , it had an auto clutch... Gearup for 1st, then one down for 2nd through 5th. That thing was a total swamp buggy-sealed airbox wih a snorkel. I drove it off into several deep creek holes, and it would come floating back to the top upside down by it's balloon tires.
Take it to the river bank, tilt it on its rear end, pull a plug to clear the water, and it was good to go for another round around the creek.
Anyway, the fun transmission part was: When on a dry trail, if you held the gearshift down when going to second it was like pulling in a clutch, rev the piss out of it and then let the gearshift up, and Wheelie galore. They were easy and fun to wheelie with a right knee on the seat and foot on the rear bar and left on the foot peg and gear shift. You could ride that sucker throuh 4th, unless one rear tire was low, then you'd veer off in the direction of the low tire.
That thing was fun and a welcome break from MX 2 strokers with open airboxes, that hated water.
I think the way you shifted was similiar to the old Hnda trail 90's, thugh I never had one of those.