Exhaust system has had it! - Now what's the best cheapie option?

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PuTwAcKi

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Apr 8, 2012
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Location
Sioux Lookout, Ontario, Canada
It's time to do something about the exhaust on my 1981 GL1100i. The mufflers have both rusted almost completely off right at the headers.

Here are the "on the cheap" options I have thought of:

1. Reattach them by welding a band of steel around the gap between the head pipes and the muffler and then just paint the ugly away (Seems like too much effort when you add in the ugly factor).

2. Custom bend an adapter to weld onto the headers that will allow for the attachment of generic or Harley slide on mufflers (Should be able to get a pair of OEM take-offs from a Harley for dirt cheap).

3. Same as the previous option except with with straight pipes (tuned) rather than a muffler. I'd want to maximize the flow if I was to do this. Apparently, if you use the proper diameter pipe you'll be able to get a bit of back pressure whilst taking advantage of decent flow rate. Apparently the optimal diameter will have a decent tone that doesn't sound raspy either. I'm pretty sure 1-3/8" or 1-1/2" pipes would do the trick although might look a little odd being that they would look so skinny. It might be worth it to trade a little style for performance.

As far as the headers go, they both have split seams to be welded shut and the heat shields are a little mangled. Since I'll likely be removing the shields to sandblast and paint the headers I'm considering using header wrap rather instead of replacing the heat shields. I don't mind sacrificing pretty for performance as long as I don't evolve the bike into a rat!


So here are my questions!

Has anybody taken any of the above mentioned routes? If so, what positives and negatives have you noticed?

Does anybody know of anywhere I could buy a chunk of pre-bent pipe to go from the headers to a slide on muffler? Anybody want to bend me some who as made them before?

Thanks for any and all your help!
 
option 3 is the one i did....i have a 79 gl 1000 thats exhast was bad ...maybe not as bad as yours anyway i cut off at the point just past the rear mounting on the frame and from there added 4"exhast pipe back the fact is 4" pipe works good and you can run that long ...and if your on a dyno or somthing you can cut the 4"pipe at the perfect spot to match the cam you have for the back pressure you need at max flow ....it dosnt get any better than that ....i did pretty good on the mongrel even with the mild cams of the 79 it would run hard
 
Thanks for the heads up I'll definitely look into that. I don't have any loyalty to original parts so price is my bottom line but the fact that OEM stuff takes no messing around to install is certainly appealing.

joedrum, since my bike is fully clothed I need to make sure the pipes run parallel to the ground and make it out past the saddle bags. That being said, I'd likely need a much narrower diameter pipe to accomplish the same effect in my situation. I won't be dyno testing or racing it but I do enjoy optimal performance from minimal expense! Thanks for your input!

I think whatever I do will be a result of opportunism. Meaning I'll settle for whatever I can get my hands on the cheapest and fastest because I want to get back up and riding again last week! Still, I don't want to end up regretting what I decide to do because I end up burning a hole in a saddle bag or a piston or my crotch.
 
dan filipi":vukkd36p said:
PuTwAcKi":vukkd36p said:
1060dsl":vukkd36p said:
As i mentioned - I do not have any more mufflers sold the last one Sunday - but I may be comming across one ina week or two if we can cut a deal that is.

in the mean time have a look here nice looking slip-ons

https://ontario.kijiji.ca/c-cars-vehicle ... Z363159752

Those look nice. Is that your listing?
Just FYI, those are extensions not mufflers.

Ya I know but if he is going to have something created the extensions can be used in the area that shows
 

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