My first set of panniers were the OEM Suzuki set and, while integrating beautifully on the bike, capacity was not their greatest asset. If you take a chainsaw to your helmet and cut it into 4(?) probably 6 pieces, it'll fit. I'm currently using Kappa 37 K-Force panniers and I would still need a chainsaw to tuck my lid into them. The 48L version of the Kappa Pannier is going to be bulky yet still not big enough for what you're looking for. As far as lock compatibility (on non Suzuki Panniers) is concerned, I'm going to suggest that this would be a lost cause as well.