1983 R65 Exhaust Questions

[tc80211]

Hey Guys,

My build is coming along. I am turning my attention to pipes as mine pretty much had rust on every square inch, I need to replace both headers and mufflers...

Been doing some searching and the 35mm diameter does not seem prevalent whereas the larger 38mm (for R100's) appear to be everywhere... I would love to find a decent used header pipe, since im going to wrap it I dont care about the finish. Any spots other than ebay to check, which seems to contain the rusty mess of headers?

Mufflers are a bit easier, just going for a used set of whispertones for now. Maybe something a little more trick in future but my GS750 already provides enough noise headache for now.

Has anyone tried MAC headers? Maybe there is another company that makes a decent 3rd party? I see the BMW OEM replacements are quite pricey so would prefer to avoid that route, if possible.

[montmil]

You pretty much have three choices for the R65 headers: BMW OEM, MAC and eBay. The market is small for the R45.65 headers hence the lack of aftermarket resources.

[georgesgiralt]

Do not overlook Keihan stainless .... Awesome.

[Luca]

And header wrap  8-)

[tc80211]

Thanks guys! Just needed a sanity check. My buddy has a '78 R100 /7 and ample options... so maybe i'm a bit jealous

[wilcom]

Do not overlook Keihan stainless .... Awesome.  

I just checked out the Keihan site and almost ordered on the spot! OOPs those are Pounds and not dollars........... still a full stainless exhaust system for under a $1000 shipped is not too bad If it had been in dollars, it would have been in the mail already!!

[georgesgiralt]

Keep in mind they give a 10 years warranty and that mine are as good as new after 15 years of service....Last but not least they carry approval so LEO won't bother you. Awesome product.

[Ed Miller]

I got whatever stainless ones Motobins sells.  They're nice.  I think they are cheaper than OEM.

[montmil]

Don't know about laws regarding motorcycle exhaust system approval and noise level limits outta the US of A, and Texas, but with all the Hardley-Ablesomes ripping straight pipes in my AO, the Airheads running roarty Dunstall Peashooter repops never get a look nor a listen from Johnny Law.

[livingdeadhead]

we've a couple of exhaust builders over here in sheffield , one guy does it in his spare time , got all the bending gear all stainless too , you not got anybody like that over the pond ?

[wilcom]

Airheads running roarty Dunstall Peashooter repops never get a look nor a listen from Johnny Law.

Here either in SoCal  There will be a million Harley's and a few hundred screaming Duc's impounded b4 they ever take a glance at a Beemer

[wilcom]

we've a couple of exhaust builders over here in sheffield , one guy does it in his spare time , got all the bending gear all stainless too , you not got anybody like that over the pond ?  

I have yet to find one, have been on line searching and found nothing. If anyone knows of a pipe bender in Southern Ca. Post up his contact, please....... nice little under seat stainless work would be slick

[DerekM]

I second this. I can ask some cretins on Thursday if that would help.

[Luca]

How much slop you can get away with in the exhaust system?  35mm is .075mm (or roughly 3 thou) less than 1-3/8"  That might open up some possibilities... at least for mufflers.

[Barry]

we've a couple of exhaust builders over here in sheffield , one guy does it in his spare time , got all the bending gear all stainless too , you not got anybody like that over the pond ?  

That might be worth looking into when I need replacements.  Stainless exhausts are expensive.  Silencers I can understand as there is fabrication involved.  I've never understood the price of pipes though. Crossover aside it's just a length of stainless tube bent to shape. How hard can that be when you have the bending gear.  35mm stainless exhaust tube cost less than £12/M