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This is a discussion on Exhausted this subject within the General forums, part of the Caferacer.net Forums category; 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 ...

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  1. #1
    LiLBull's Avatar
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    Exhausted this subject

    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...


  2. #2
    Senior Member Geeto67's Avatar
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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_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

  3. #3
    LiLBull's Avatar
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    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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  5. #4
    LiLBull's Avatar
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    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.


  6. #5
    Senior Member Geeto67's Avatar
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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.


  7. #6
    LiLBull's Avatar
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    yeah thats true its a racer web site ..I do have to keep reminding myself.


  8. #7
    Moderator jbranson's Avatar
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    I sell some exhaust parts...not really suitable for the street though.

    Well...I guess it depends on what you street you live.

    http://www.jrbranson.com/BikeParts/CDR-Parts.htm

    JohnnyB


  9. #8
    LiLBull's Avatar
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    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 .


  10. #9
    Moderator jbranson's Avatar
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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


  11. #10
    LiLBull's Avatar
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    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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