I've tracked down a very annoying rattle on my '24 V7 Special and found that the source is the right side exhaust pipe touching a part of the frame where the side stand is mounted. At idle and certain rpm's the pipe vibrates against the frame and causes a loud rattle that I cannot ignore. I've searched the forum and found it mentioned but no particular solution given. Any ideas or experience on how to rectify this is greatly appreciated!
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Exhaust pipe touching frame and rattles.
- Thread starter johnnyh
- Start date
To fix involves loosing head exhaust studs slightly and also the clamps for crossover on rear of head pipes. Move one side out, then recenter head pipes so as not to touch. You may have to loosen the muffler hanger & clamps also to achieve this task. After centered w/gap for pipe by stand tighten all you loosened to spec.
Thanks for the fast reply! Do you know off hand what the torque spec should be on the exhaust studs?
It is in the workshop manual. With an account upgrade you can download it from the Downloads section. https://www.guzzitech.com/forums/threads/user-account-upgrade-donations.14025/
All set...This worked great! Don't know if it was really needed but I wedged two plastic shims between the pipe and the frame to force the space to stay opened so nothing moved while re-tightening everything (found the spec) then removed the shims. All stayed in place. The bike now sounds so much better!
So very much appreciated!That's great, if spec for studs was 7ftlbs then make them 10. Cause they loosen up at 7. Didn't know if they were still 6mm. If they are 8mm like bigblocks, make them 23 not 18. Lots have lost their nuts while riding. HaHaHa
Ride Safe
Ride Safe
Yes...I torqued them to 7 but I'll get out there tomorrow and give 'em 10...sure as hell don't want to drop a nut...
I think your bike has 8mm studs, I looked in parts. That would be 18-23 for 8mm. Check size.
If an 8mm stud, the nut would be a 13mm. The 7mm studs use an 10mm nut.
Thanks! Not home now but will definitely check it before going anywhere! You help Very much appreciated!
Checked it out and the nut is 10mm so I left them as is…I’ll keep checking on them. I’m wondering if Loctite would help but the heat might negate it?
Yes it will cook off the loctite. In fact I put an anti seize compound on the threads so the nut won't freeze to the stud causing breakage later on trying to remove. Then I use wrench art to tighten. If the threads are wet, the book torque isn't the amount to torque.