Only just seen this but I have exactly the same issue with my 2025-build GSA. Lights are terrible: if you adjust the high beam down to make it legal (ie not an mot failure) then the dipped beam is so low that it is genuinely dangerous. So in the end what I have done is adjust the dipped beam for safe riding, and never use the main beam because it is pointlessly high. If I still have the bike when it is due its first mot, I will make this the supplying dealer's problem.If everyone else's lights are normal and mine appear dim, mine need corrected. I could angle the light up and run low but as I said then the high beam is way too high. I've never had this on any vehicle or motorcycle, is my 1300 the only one like this?
It seems to me that this inability to have both dipped and main beam correctly and legally adjusted is a serious defect. The lights on my previous 2022 1250 GSA were much better.