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Buell Forum » Old School Buell » Archives OSB 001 » Archive through November 02, 2005 » Exhaust header is rubbing the frame on my '99 S3 « Previous Next »

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Buellsrule
Posted on Tuesday, October 11, 2005 - 04:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hi guys, I've replaced the gaskets, isolators (found right side cracked) and have been very careful to install everything lined up and not in any kind of a bind. No matter what I do the frame is still settling on to the header right below the O2 sensor where the header makes the turn towards the front of the bike. Everything else looks okay including the tiebars. I'm really scratching my head on this one. Both my stock header and my D&D full system will touch the frame when riding the bike. This is a recent development and I've owned the bike since new and know how the exhaust install works. What else can you think of doing or checking? Thanks in advance, Frank.
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Oldog
Posted on Tuesday, October 11, 2005 - 05:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

front iso? & bracket?
swingarm mount block?
its close any way
some thing is out of line....
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Whodom
Posted on Wednesday, October 12, 2005 - 01:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'd try and find another identical (or at least close) bike and compare them side-by-side. That might help you spot something. If the rear isolators are good, the swingarm block is bolted up solid, and the tiebars are OK, the only thing left is the front isolator and/or bracket.

One other possibility: do you have the updated front muffler mount? If not, perhaps the muffler is "sagging" on the mount and this is tweaking the headers enough to cause the interference.

Good luck.
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Buellsrule
Posted on Wednesday, October 12, 2005 - 02:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I just knew that replacing the isolators (all three) would do the trick. It hasn't. Everything lined up perfectly and there is slight clearance between the frame and the header (yes I know there's not much). But when you ride the bike, the frame is touching the header and this has not always happened. It seems like it's something obvious and small. I just can't figure it out. Keep the ideas coming. Thanks, Frank. I will let you know when I get it figured out.
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Tripp
Posted on Wednesday, October 12, 2005 - 02:57 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

not sure which exhaust you're running, however, if you use the stock header gaskets on some of the after market exhausts it'll give a funny or totally unusable fit as some of the after market pipes require the little thin old style gaskets. i hope it's something easy like that anyway! just a thought. good luck
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Bomber
Posted on Thursday, October 13, 2005 - 10:19 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Rule -- I had a similar issue with my Y2K MaDeuece -- scratched my head til it sprang a leak (good thing I didn't have anything of import in there) . . ..

I wound up dropping the exhaust, replacing the header-to-head gastkets (those little brillo thingies), tighten up the system in stages, head to can end, meebe in four stages, and, zippo bang, no contact --

don't know if that would help you or not -- just another data point for the graph in the sky
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Iamike
Posted on Thursday, October 13, 2005 - 10:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I went out and looked at mine. I can almost get my finger in the gap, about 1/2". I don't see how just a thicker gasket would have caused that problem.
If the lower mount was to the right or down, that may cause the pipe to move closer to the frame.
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Easy_rider
Posted on Thursday, October 13, 2005 - 11:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I went out and looked at mine (finally) as well. I can get my fingers through the gap (I wouldn't be accused of having beefy hands).
Looking at the rear of the engine, and don't see how anything could be off center back there unless one of the mounts was the wrong one.
Looking at the front, I noticed the bracket at the top (helm joints?)looks adjustable. All of nuts are together. I grabbed the same part out of the box of parts I've got in the basement and noticed that there's a gap, probably lengthening the bracket by half an inch.
If you want some pics for comparison on any part of the bike let me know and I'll send them out.
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