High-G FJR Junkie!
Join Date: Mar 2015
Location: Rolling Prairie, Ind
Givi 357/Shad tube rack or the Yamaha heavy aluminum rack are the only things that will help prevent that. Yamaha recommends a max of 10/11lbs max over the weight of the top box, no more.
As you probably already know a new subframe is $600+ ,,,, depending on what year you have (you don’t list the year or location, highly Recommended) you might call Yamaha and ask them about it and MAYBE they’ll give you a discount on a new one. Myself if they won’t help you out on a new one I would heavily reinforce your current subframe. They are very thin cast aluminum and when mine broke I found it to be .060-.090in thick in most places, very thin. Also anything you can do to reduce or eliminate the flex of the tab at the very rear of the top portion of the frame that everything bolts to will help as it is the lever that creates the flex that flex’s & breaks the lower subframe by transferring the flex of the tab through the struts between the upper and lower portion of the frame.
You didn’t post what topbox or backrest you were using and any adapter mounts. Keeping the tab from flexing is the key to not breaking things, by the way I used a “stiffy” when mine broke, well made piece but does nothing to keep the tab from flexing but when it does break the stiffy will keep your parts from littering the highway behind you but will not prevent the subframe from breaking.
Red 2014A, the fastest color !
Ride more,, worry less !