High-G FJR Junkie!
Join Date: Oct 2005
Location: Australia No fixed address
Yes, subframe failures are a frequent issue when using Top Boxes. However, if you are using the correct GIVI SR357 mounting rack with your Givi Top Box, then this should be sufficient to re-enforce your subframe. I would still recommend that you use the smallest Top Box available. There are 3 main causes of subframe failure, these are high speed riding, which causes high wind loading on the box. Excessive weight in the Box, and riding on rough roads.
FJR Models owned from new, 2001, 2003, 2006, 2009, 2011, 2014.