Originally Posted by
mstateglfr
The issue the OP described is not a Microshift specific issue. It can be an issue on Shimano bar end shifters and even old SunTour ratcheting friction shifters. If there isnt enough counter-tension on the screw in the shifter, then it the cable will adjust until it is in a neutral position, which means the derailleur will move in kind. When set up properly, all brands will keep the tension at the level you want.
I use Shimano BS64 bar end shifters on three bikes, they have never come loose and failed to hold the bike in the right gear. And I have not heard of any Shimano BS64 or BS77 shifters getting loose and fail to stay in gear for anyone else due to a loose screw.
But I have talked to two people that had that problem with Microshift, one of those I fixed it for him by tightening the screw for him. The other one, she said she was taking the bike to the shop that installed the shifters less than a week earlier so I did not try to fix her bike.
Perhaps your experience is different than mine.
I never used the Suntour bar end ratcheting shifters, at that time I had the old Shimano ones that had a return spring, and yes those did require periodic adjustment.