Hi Dave,
My K2 has these DSS replica bars - not happy. The locating holes are radially in the wrong spot & so to be able to use the mirrors the bars are canted at slightly odd angle...
Your 15mm gap... LHS? It's been suggested here this gap is to accommodate the (UK only) lights master switch - that crappy up/ down slider / external wiring jobby. It was required in an effort to stop you inadvertly going from HI beam all the way to OFF; I guess the logic was sound enough.
If your gap is both sides, like me, you've ended up with less-than-perfect bars. Never seen OEM for sale, nor indeed good 2nd hand ones, I trawl eBay all the time. My gap was less, but still too much. I had to (slightly) stretch / coax the grips all the way along.
Anyone out there know a GOOD copy supplier let me (us) know pls.
Simon