I hadnt ridden a ct 90 for a few years and my recent purchase has neutral at the bottom and all four up from there is that normal? its a 79 model it seemed to me my 1970 was neutral at the top and four down to upshift I could be wrong its been a while and i didnt ride it much before i took it apart. I kind of wish i could get a one down adn three up pattern going just to be consistant with my big bike which are one down and four or five up depending on the bike. could an S90 shift drum or selector mechanism be used ? its been 45 years but i thoought they were one down and three.