Basically I am planning to fit a MHR rep 70s on my 50 ac typh which gear up kit would be more suitable for a 70s typh with a pm360 and open filter. Primary or secondary? Thanks
More suitable? That makes no sense. There are lots of topics explaining how gear ups work and what one you should buy. Here are links to some... http://www.scootershack.co.uk/viewtopic.php?f=6&t=18336 http://www.scootershack.co.uk/viewtopic.php?f=22&t=17114 Etc etc. After reading them to get an understanding I will also add that stage6 primary gearups are pre-pressed so you are able to fit them yourself instead of needing somewhere with a 10 tonne press to do it.