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FJR Motorcycle Forums
Technical & Mechanical Problems
FJR Unsuitable for Passenger with Top Box Fitted?
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<blockquote data-quote="Fred W" data-source="post: 1054037" data-attributes="member: 3828"><p>As far as I know, nobody has ever overloaded or cracked the main part of rear sub-frame, i.e. the tubular part identified in the below diagram as shaded green, which supports the rider, passenger and sidebags.</p><p></p><p><img src="https://i916.photobucket.com/albums/ad4/FJWinNH/FJRRearSubframe-1.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>The only part that has cracked (on both first and second gen bikes) is the rearmost cast alloy part of the sub-frame assembly highlighted red below. It appears that part was deigned just to hold up the rear cowling, fender and tail light assembly. Putting the weight of a trunk on that piece is what kills it. Supporting that weak metal casting with a frame of steel seems like a good idea. But I see no reason to tie it back to the main frame. Just tying it into the tubular steel subframe (the way a Givi trunk mount does) looks to be good enough</p><p></p><p>BTW - it's worth noting that the riders foot-pegs are suspended off the main frame, but the passenger's are hung off the green part of the sub-frame assembly.</p></blockquote><p></p>
[QUOTE="Fred W, post: 1054037, member: 3828"] As far as I know, nobody has ever overloaded or cracked the main part of rear sub-frame, i.e. the tubular part identified in the below diagram as shaded green, which supports the rider, passenger and sidebags. [IMG]https://i916.photobucket.com/albums/ad4/FJWinNH/FJRRearSubframe-1.jpg[/IMG] The only part that has cracked (on both first and second gen bikes) is the rearmost cast alloy part of the sub-frame assembly highlighted red below. It appears that part was deigned just to hold up the rear cowling, fender and tail light assembly. Putting the weight of a trunk on that piece is what kills it. Supporting that weak metal casting with a frame of steel seems like a good idea. But I see no reason to tie it back to the main frame. Just tying it into the tubular steel subframe (the way a Givi trunk mount does) looks to be good enough BTW - it's worth noting that the riders foot-pegs are suspended off the main frame, but the passenger's are hung off the green part of the sub-frame assembly. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
FJR Unsuitable for Passenger with Top Box Fitted?
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