I picked up a 1984 big red, how much do you know about the transmission and sub transmission or hi low and reverse in those? It’s been sitting for years, had a new top end job done to it, but it doesn’t seem to want to shift with foot shifter into any particular gear. The gear shifter moves up and down, but doesn’t click into gear, even when I rock the machine back and forth. The hi low seems to work ok. Maybe I need to move the hi low and try the gear selector? Just curious as to if anyone here has ever been inside of one of those and what your thoughts are. Thanks in advance!