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Discussion Starter #1
I havent found any good source for vintage exhaust I have found one exhaust.com i think that had mac systems ..as I have a varity of japanese bikes wonder where are the good vintage exhaust places most have new stuff but the old stuff seems to be out in the cold ...I guess soon enough it will be realised there are a lot of old bikes still ticking out there or soon to be ticking lol im my case.So far there hasnt been a single part you guys dont have a clear path too.Please,point me in the right direction...
 

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Mac has a lot of exhaust for older bikes. They get the job done but are thin metal and prone to rust out. They don't do a lot of research either as some of there stuff does not fit all of the bikes they advertise it for. For example they advertise a cb750f header for the 77-78 bikes but the header is really a design for a 75-76. The difference is that you can'y mount a 75-76 header on a 77-78 because the oil filter hits (yes you can change to a 75-76 style filter it is just a shorter oil bolt).

You seem like a do it yourself kinda guy, why are you looking for bolt on exhausts for bikes worth less than $1000. If you have welding equipment here is what you do - go down to the local exhaust shop and buy a whole bunch of tubing in different shapes and bends including straight sections. Then just cut and weld till you get your exhaust made. You can use the stock headpipes for the difficult parts if you want. Any custom exhaust shop will charge you more than your bikes are worth for one set.

Or you could do the a-social, Geeto67, approach: Sawzall the head pipes at the muffler junction and just run them as open drags. The neighbors love that wrap-wrap-wrap sound at 6:30 am on sunday. Or if you are not on a first name basis with your local police and don't want to be, get a couple of reducers from the ehxaust shop and weld in some automotive "cherry bombs". Painted black with header wrap on the head pipes they look like fuck-off nasty race pieces. of course if you want to go the show route, British cycle supply carries a whole bunch of different muffler styles including coctail shakers and dunstall replicas. Get a reducer, mate it to your stock headpipes and have it all chromed.



edit: here is Mac's homepage for motorcycles http://www.macperformance.com/store/category.cfm?SID=3&Category_ID=4

What bikes are you looking for exhausts for? list them out, maybe someone has something you can use.

Forgot to mention chambers for 2 strokes are going to need engineering and research. It's all out there on the web, but what I have found is that if there is an enthuasists group for that 2 stroke, someone in that group is always making chambers.

It doesn't pay to mass produce exhausts for these disposible 70's jap bikes because there is no market for a system that will cost 1/3 or more of the purchase price of the bike.

Edited by - geeto67 on Oct 27 2005 2:43:55 PM
 

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Discussion Starter #3
I agree but after the time and money spent going thru the bike I was hoping for someone selling japanese slipons of some sort .I know I can make my own put I was hoping to buy and fit up .Besides its hard to get the smaller diamiater tubing I have a tube bender for mandel bends and would just need to buy the die but I was hoping not to make a custom exhaust for ever thing lol .Hey If I have to I will but Id rather bolt and flat black it out not much a chrome guy .Like that Hand made look ! the more nuts and bolt mechanical it looks the more I can enjoy its raw form the better! Its the only reason i like twin leading shoe over disc looks so Edward Sissor Hands.As ussual I always like your bend on things Geeto Thanks George



Edited by - LiLBull on Oct 27 2005 7:51:20 PM
 

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Discussion Starter #4
and thats the end of the exhaust story no one else has any sources on vintage exhaust,mufflers ,headers that they had luck with and are happy with the quality or lack of....just geeto67 ...I guess Geeto67 is the only one that bothers putting pipes on his bikes.
 

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If you have a local speed shop or muffler shop you can fit any modern slip on on any of these old jap bikes. Just tkae what ever head pipes you have with you and find a reducer to fit on the end. If you have a one piece exhaust, just hack off the stock muffler and fir either a slip on or weld on reducer. It helps to have a slip on muffler in mind so you know the big side for the reducer collar. A lot of guys who own SOHC cb750Fs just get an angled reducer, remove the stock muffler and bolt on the reducer collar and the slip on can.

slip on for modern bikes are jsut that, mufflers that slip on the stock head pipes. They do this because modern bikes have some sort of a restriction in the head pipe to build low end torque and a restriction in the muffler for noise abatement. Getting rid of the restriction in the muffler frees up the system without upseting the torque restriction in the pipe. Aftermarket headpipes usually have the same restriction (on some bikes its a valve, on others it just looks like squashed tubes)but are lighter.

A lot of the guys here build race bikes bull, they have no real need for mufflers.
 

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Discussion Starter #6
yeah thats true its a racer web site ..I do have to keep reminding myself.
 

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Discussion Starter #8
Johnnyb Thanks thats helpfull,the real question is how many disc does it take for a street bike LOL IM ONLY JOKING IVE USED Super traps for years on sports cars!I do like your GP pipes still waiting for aarons inexpensive exhaust guy to be known .Im not holding my breath though ,If their hand made I ll make them myself .
 

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Well...they are hand made with about $10k in various bending, rolling and welding equipment. But yes, hand made.

Mandrel bends can always be purchased from Headers by Ed. then cut and welded together to make a system.
JohnnyB
 

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Discussion Starter #10
Yes johhnyb I know its why I was trying to source manufacturers the cost in equipment ,I drool over those new Hydro benders or even a computer programed hydraulic bender .Ed been around lol longer then me now he musy be exhausted ok bad joke ah well! Thanks as always for your input Johnny b

George
 

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I talk to Ed a couple of times a year, good guy. He's my source for pipe when someone wants the absolute lightest system they can get. I'll use his 18ga tube.

For bending I use a Hossfeld manual bender. You can pick up the basic machine for about $800 with no dies. If you pick and choose carefully you can get the dies to do most bike exhaust for another $800 or so. But..as with any manual bender, each system is a bit different from the next....ie...pain in the ass.

A cheapo roller can be had for around $300-400 that will do 22-24ga megs just fine...although it's a bit of an art even with a roller. Get one of the 30" combination machines $300-400 and it has a shear and press brake too. The shear is an absolute necessity for doing megs. The butt welded seam has to be perfectly straight.

Inexpensive name brand TIG can be had for around $1200 I think. Been 12 years since I bought my SyncroWave so I'm not sure. Course it could be done with gas, just kinda slow.

I've come to the conclusion that CNC stuff is just out of my reach. I've been to several auctions...the affordable stuff is obsolete crap, the decent stuff is astronomical in price. CNC pipe benders are just too useful...you don't see people getting rid of them. But...that would be the tits...do it right once...next time just throw the tube in and turn it on. Would reduce fabrication time of a whole system by about 70%....but I guess you'd still have to charge more to pay for the machine :)
JohnnyB



Edited by - jbranson on Oct 31 2005 12:54:01 PM
 

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Johnny, I use one of those cheap combo roller shear things and they work okay, but as you say, its all really handwork to get it right. If someone wants to do it, its the initial pattern that makes a differnce. You can't just cut a square and roll a cone, it has to be a "flat cone" to start off with.

I do all my headers with Aircone supplied bends and weld them together, then roll megs and silencers, but it ain't quick. Its a full 10 hour day in the shop for one set for a CB350.

Maybe Mac is the way to go!

adios muchachos
 

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Same here...pretty much a day in the shop. The tubing bender speeds things up some...but if you bend something wrong you have to throw it in the garbage unless you want to cut and weld it.

Is Aircone still in business!? I tried for a year to get in touch with them/him...no luck. Lately I've heard someone say he died or something, phone disconnect etc.

I looked in my sheet metal workers hand book and got the layout setup for cones...then I made a bunch of metal patterns for different sizes, drilled a hole in them and hung them on the wall. Now I can just pull them down and trace them. Huge time saver.

I hate making exhausts....but I love the results when they turn out right. Bent up some stainless not long ago...oh man it bent beautiful...easier than DOM tubing. Course I bent them for a CB160 instead of a CB175 sloper with vertical head...so they are just sitting in a box :(
JohnnyB
 

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Discussion Starter #14
building parts takes allday,and then some Ive made a entire aluminum body for a porsche 550 spyder replica with bead bag and a small english wheel took 7 weeks to build the nose amd dash hoop inner and outer rockers...lots of pounding and wheeling and still only half the skins of the car, and then some one says they can get it cheaper I say show me the guy Ill buy them allday !!!

johnnyB you can learn all you want here and buy the tools required best thing is the instruction videos itll get you where you want to go fabing aluminium.

http://metalshapers.org/pros/



Edited by - LiLBull on Nov 01 2005 07:54:12 AM
 

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Gotta get me some 1100 aluminum and a bag of sand!

Thanks for the link. Looks like plenty of info there.

JohnnyB
 

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Another good source for race exhaust is Jemco, out in Cali.(I think). He'll make custom stuff if he hasn't already made it for the bike in question. Seems like a reasonable guy too. Doesn't have a web site, just a name and #
John Easton 713-461-3834

FR
 

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Jemco is really good but pricey. I only have expirence with the 2 stroke chambers and his prices seemed in line with what others are getting for pipes. A lot of the kawasaki triple guys use jemco chambers and like them.
 

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Bought one of the predator systems several years back for my 175 twin. Nice heavy duty Stainless street system....quite heavy in fact. Fit was pretty good. I think it was about $450 by the time I got it to the US.
When I got the box it was covered in sheet after sheet of freakin mailing stamps...hopefully their shipping dept has improved since then.
JohnnyB
 

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Discussion Starter #20
johhnyb great to here that was wondering how long it would take ,and I havent even looked into current exchange rates with the euro.Just look slike they cover alot of models.
 
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