Does anyone have any good sources on exhaust straps? I have an 09' 12X. Just got back off a deployment and took the kiddo out for a ride. I go to put the bike away and notice the front strap is loose. Of course I check it and it's completely snapped. The rest of the pipe looked okay, but I'll check it tomorrow. ASB was my source before they shut down. Any help? I will probably go ahead and drop the pipe and paint it while I'm at it. Thanks
Exhaust Straps?
- Thread starter UlyPete
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GregoXB
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I'm selling muffler straps
http://www.buellxb.com/forum/showthread.php?51422-OEM-and-after-market-parts-for-sale
http://www.buellxb.com/forum/showthread.php?51422-OEM-and-after-market-parts-for-sale
You need new unused strap, manual says always discard front strap after removing it and install new strap. I believe manual says the rear straps should be discarded too if you are going to detach them, but double check it.
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user_deleted
Well-known member
pete: you do NOT need to discard the 1 front and 2 rear straps under certain conditions as stated above though i don't doubt the manual states something ludicrous such as that. the reason the front strap snaps with greater frequency is: a bit more load placed upon it than the 2 rear ones....the 3 straps torqued incorrectly....the front bracket installed incorrectly....the front bracket and strap installed in tandem incorrectly. there is a precise procedure to follow when mounting the stock muffler or a physically identical clone to the stocker....and if not followed broken straps will always occur.
Well, I got the muffler off and reminded myself that I racked the pipe on a curb some time ago. Right across the rear band clamps. So, I won't be using those again. Does anyone know where to find new ones? Searching all around. Found them on Twin cycles for 74 euro ($84) for all three. Seems like an awful lot for some band clamps. Grego, I'll be in touch!
The service manual calls for the rear strap fasteners to be torqued to 60-80 lb/in. However, for the front strap fastener it calls for 108-120 lb/in., back the nut off 2 turns then retorque to 108-120 lb/in. That would work if you had absolutely no lubrication on the clamp bolt (Loctite or oil) and if the bolt wasn't plated. I say this because the first time I had to install the front clamp the torque value just seemed ridiculously high to me. To check my thinking before ruining a new clamp, I ran a piece of the old front front strap fastener through a tensile strength tester. That test showed that the 3/4" wide by .04" thick piece of 18-8 stainless steel had a yield strength of 2700 lbs. If the clamp bolt is lubricated at all, torqueing the nut to 120 lb/in as per the manual applies 3015 lbs. of pull to the strap, exceeding its tensile yield by over 300 lbs. In fact, 108 lb/in puts it right at the max of 2700 lbs.
I have to wonder if the 2nd torque value is a misprint. It would seem to me that you would first torque to the 108-120 lb/in. to permanently deform the clamp around the muffler and mount, back off 2 turns then re-torque to 60-80 lb/in. for the final tightening.
I don't know.
The bottom line is that I torque the front clamp to the same values as the rear clamps. No issues so far.
I have to wonder if the 2nd torque value is a misprint. It would seem to me that you would first torque to the 108-120 lb/in. to permanently deform the clamp around the muffler and mount, back off 2 turns then re-torque to 60-80 lb/in. for the final tightening.
I don't know.
The bottom line is that I torque the front clamp to the same values as the rear clamps. No issues so far.
Thanks everyone for your info, parts and expertise. I still had to take the pipe off three times due to forgetting things. Like the exhaust cable, pipe clamp and then to run the front band clamp through the damn bracket. Tools were thrown, neighbors were frightened and parts had to be cutoff. But I did it and got it all back together. Hopefully no further issues for the time being. Thanks again
Tbone
Well-known member
First time is always the hardest n then it is downhill from there. I remember the first time I took my muffler off and used manifold primer and paint on it. Within a few weeks it looked almost exactly how it did when I first took it off the bike.
