Trunk Mount/Passenger - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #1 of 9 (permalink) Old 06-19-2020, 12:16 AM Thread Starter
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Trunk Mount/Passenger

Can I get a clarification about the first gen, specifically my 2005 regarding the possible subframe crack. Is it just if using the trunk, or passenger pressing against the trunk that causes the issue? My daughter,6'1" and 170lbs, is on me about going for rides already. After reading about the subframe issue I am looking to understand better whether I can trust it for doubling up.

Thanks

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post #2 of 9 (permalink) Old 06-19-2020, 06:49 AM
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If you are using a Givi rack (sr357 for later models, donít know for your gen) it isnít an issue. Failures arenít really from passenger weight. Itís more of a flexing issue. Get a stiffy from garauld TechWorks and itíll be fine. Itís not going to dump your passenger, regardless.
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Can I get a clarification about the first gen, specifically my 2005 regarding the possible subframe crack. Is it just if using the trunk, or passenger pressing against the trunk that causes the issue? My daughter,6'1" and 170lbs, is on me about going for rides already. After reading about the subframe issue I am looking to understand better whether I can trust it for doubling up.

Thanks

David
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post #3 of 9 (permalink) Old 06-19-2020, 09:23 AM
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IMHO, passenger should not be leaning on the top box, it should be there as a backstop just in case kind of thing. If you're going the top box route, highly recommended you upgrade the rack to Givi or Yamaha aluminum rack.
The subframe can crack, but no danger of it separating and falling off.

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post #4 of 9 (permalink) Old 06-19-2020, 11:50 AM
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Quote:
Originally Posted by David Shelton View Post
Can I get a clarification about the first gen, specifically my 2005 regarding the possible subframe crack. Is it just if using the trunk, or passenger pressing against the trunk that causes the issue? My daughter,6'1" and 170lbs, is on me about going for rides already. After reading about the subframe issue I am looking to understand better whether I can trust it for doubling up.

Thanks

David
as far as i know its only from someone leaning hard up against the topbox for back support since the cracks happen quite far back. i dont know if you have seen the pics from the stiffy kit you can see where abouts the cracks happen




if you have no topbox and are riding 2 up i dont think you are in any danger here but thats IMHO

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post #5 of 9 (permalink) Old 06-20-2020, 03:06 PM
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My wife leans against the top box but I have a givi 357

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post #6 of 9 (permalink) Old 06-20-2020, 06:02 PM
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FWIW, the first photo from hipi101 is from a Gen2/3 subframe. Here is a typical Gen1 failure:



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post #7 of 9 (permalink) Old 06-22-2020, 02:28 AM Thread Starter
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Quote:
Originally Posted by Bill Lumberg View Post
If you are using a Givi rack (sr357 for later models, don’t know for your gen) it isn’t an issue. Failures aren’t really from passenger weight. It’s more of a flexing issue. Get a stiffy from garauld TechWorks and it’ll be fine. It’s not going to dump your passenger, regardless.
Quote:
Originally Posted by David Shelton View Post
Can I get a clarification about the first gen, specifically my 2005 regarding the possible subframe crack. Is it just if using the trunk, or passenger pressing against the trunk that causes the issue? My daughter,6'1" and 170lbs, is on me about going for rides already. After reading about the subframe issue I am looking to understand better whether I can trust it for doubling up.

Thanks

David
My apologies, just now realized I didn’t include that I am in fact running the Yamaha factory trunk when it is on. I plan on getting Garauld’s stiffy kit
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post #8 of 9 (permalink) Old 06-22-2020, 03:49 PM
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For whatís worth, honestly looking at the broken 1st gen frame, I think Just adding a stiffy kit would be enough as the loading on the rear tab would be transmitted to the subframe differently than on the gen3ís like mine. So a heavy aluminum rack, The givi or Shad tube racks probably arenít needed but would just be added insurance. Just my .02 worth on it.
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post #9 of 9 (permalink) Old 06-22-2020, 11:20 PM
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I use both the SR 357 and the "Stiffy Kit" on my Gen II . My wife 5'6" 180 ish rides a lot now and leans some on the padded back rest GIVI E52 trunk. 18 months and 10,000 miles no crack yet.
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