Hi, welcome to the forum,
put voltmeter across battery terminals, idle should show about 12.5-13 V, increasing revs should rise and max out about 14.2v see FAQ's for more detailed info. If more than 14.6v VR probably shot.
make sure battery terminals tight, vibration loosens, causing many issues, cutting out, starts ok, stutters at revs etc
check rubber carb manifolds, older ones perish, crack, with age let air in when flex, visual check squeezing rubber.
jets get blocked, crud collects in float bowls, needle float valves wear, water in float bowls, also in tank, we'll know on these pre 2000 . Make sure fuel filter flows right way, obvious but many fitted wrong way.
Last edited by kuyajonathan; 06-10-2020 at 11:43 PM.
2003 GS Dakar
BMW Panniers, top box, tank bag
+ loads TT stuff that came with it!