Stainless CB350 Exhaust--For Sale!
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Stainless CB350 Exhaust--For Sale!

This is a discussion on Stainless CB350 Exhaust--For Sale! within the General forums, part of the Caferacer.net Forums category; Happy Memorial Day (tomorrow). Many thanks to those who serve. I'm very much anti war but pro soldier. I gotta image those guys hate the ...

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  1. #1
    chrisf's Avatar
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    Stainless CB350 Exhaust--For Sale!

    Happy Memorial Day (tomorrow). Many thanks to those who serve. I'm very much anti war but pro soldier. I gotta image those guys hate the war(s) more the me. Anyway...

    Thanks to hack for the guidance, I whipped up this 2-1 stainless exhaust. There is a few things I would have done differently, but it isn't bad.

    1.5" primaries into 2" merge collector, then to a reverse cone megaphone. To me, the megaphone outlet looks huge, but Burns Stainless swore it was what I needed. God I hope so.

    The setup:



    Exhaust port side



    Purging with PayDough. Blue tape is much cleaner.



    Using tape. At this point, my PVC back-purge tube melted. That was fun to clean out.



    A fusion weld with back-purge.



    Slip jointed and fitted up. Little did I know this was a mistake.



    Tried it on. You can't see it in the picture, but the tubes were proper fucked under the bike.



    Springs



    The start of the collector



    Tacked



    Purged and welded



    Finished











    I love this pic. It makes the bike look really mean. One mistake I made was that I welded a supoort to the megaphone, but forgot to back--purge. It really pisses me off. I think I can get a die grinder in there to smooth out the sugar, but still; I should have known better.



    Thanks for following along. Let me know what you think.

    --Chris

  2. #2
    Senior Member HackAsaw's Avatar
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    assuming that is exactly where the muffler needs to be.....

    I think I'd cut the collector

    finish it and the mufflers mating faces to angle the collector upwards

    cut the 90 out

    reface it to push it's useful at least another ten (twenty more is easy enough since that only means five off each face) degree and you don't need nearly as much of it as you've used in the down section

    and do all these things in the name of tucking the bottom of the pipes as close to the bike as possible and blend that 90 in so it looks like you were more in control

    you no longer have to weld round tubing cut squarely so it only fits to round

    you can weld ovals too..... even weld oval'd section so it fits up to round section if you get lazy and don't want to face both sides of the joint



    very nice work from what I see

    I'm zero fan of the one sided sprung slip joints

    and we disagree on mounts.... that tangent'd skinny tab with such a tiny anchor point doesn't look durable to me

    I'd mount that whole system so solid it thought it was the bike

    really amazing how fast you stepped up with the tig

    are you feeling like it is solid and well made?

    that tail and license plate bracket does not look like it will live long

    it needs to be closer to the shock and also to have two more anchor points

    like the inside of the shock/frame next to the sole tab you currently have

    and then one from inside of the shock/frame down to the bottom of the plate

    it can be larger at the top and taper down as it descends
    Accidental inventor of the worlds fastest wearing rocker arms and other edible engine parts! Try my yummy blue cheese camshafts!

  3. #3
    Senior Member HackAsaw's Avatar
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    assuming that is exactly where the muffler needs to be.....

    I think I'd cut the collector

    finish it and the mufflers mating faces to angle the collector upwards

    cut the 90 out

    reface it to push it's useful at least another ten (twenty more is easy enough since that only means five off each face) degree and you don't need nearly as much of it as you've used in the down section

    and do all these things in the name of tucking the bottom of the pipes as close to the bike as possible and blend that 90 in so it looks like you were more in control

    you no longer have to weld round tubing cut squarely so it only fits to round

    you can weld ovals too..... even weld oval'd section so it fits up to round section if you get lazy and don't want to face both sides of the joint



    very nice work from what I see

    I'm zero fan of the one sided sprung slip joints

    and we disagree on mounts.... that tangent'd skinny tab with such a tiny anchor point doesn't look durable to me

    I'd mount that whole system so solid it thought it was the bike

    really amazing how fast you stepped up with the tig

    are you feeling like it is solid and well made?

    that tail and license plate bracket does not look like it will live long

    it needs to be closer to the shock and also to have two more anchor points

    like the inside of the shock/frame next to the sole tab you currently have

    and then one from inside of the shock/frame down to the bottom of the plate

    it can be larger at the top and taper down as it descends
    Accidental inventor of the worlds fastest wearing rocker arms and other edible engine parts! Try my yummy blue cheese camshafts!

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  5. #4
    Administrator borzwazie's Avatar
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    looks great! you putting a baffle in that thing?

  6. #5
    Administrator borzwazie's Avatar
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    looks great! you putting a baffle in that thing?

  7. #6
    Senior Member HackAsaw's Avatar
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    that brake linkage rod bothers me

    too skinny, I'm assuming it is stainless, to not have some gussets on both sides of the bends

    and the bend looks too close to the shock

    can you put all your weight on it without it flexing? half your weight?

    have you made sure nothing fouls from full jounce to rebound?


    one of the down pipes should be made solid all the way to the muffler

    you only need one slip joint, I'd slit one of those swedged ends, weld a threaded bung on one side of the slit and a counter bored bung on the other

    that would be my clamp

    it would be underneath the bike and oriented so it cost zero ground clearance while being easy to get to with your socket and ratchet

    really, nice execution and I wish I was there to give you a hand with the lines

    you have all the bends you need to make it fit up and look really nice

    and doing so would gain you some very valuable ground clearance


    I will ask you this, why such a big head pipe? aesthetics?

    and that collector is much better than the other one




    how I do it is to emulate the desired pipe run on it's centerline with heavy fill rod

    that is, bend the fill rod to go where you want the pipe to run and that be your template

    then figure out what I have to cut and where to make it happen

    you can do better but I know very well what it is like to have them done and choosing to live with "almost" and thinking.....

    one of these days I am going to cut that section and and make it perfect
    Accidental inventor of the worlds fastest wearing rocker arms and other edible engine parts! Try my yummy blue cheese camshafts!

  8. #7
    Senior Member HackAsaw's Avatar
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    that brake linkage rod bothers me

    too skinny, I'm assuming it is stainless, to not have some gussets on both sides of the bends

    and the bend looks too close to the shock

    can you put all your weight on it without it flexing? half your weight?

    have you made sure nothing fouls from full jounce to rebound?


    one of the down pipes should be made solid all the way to the muffler

    you only need one slip joint, I'd slit one of those swedged ends, weld a threaded bung on one side of the slit and a counter bored bung on the other

    that would be my clamp

    it would be underneath the bike and oriented so it cost zero ground clearance while being easy to get to with your socket and ratchet

    really, nice execution and I wish I was there to give you a hand with the lines

    you have all the bends you need to make it fit up and look really nice

    and doing so would gain you some very valuable ground clearance


    I will ask you this, why such a big head pipe? aesthetics?

    and that collector is much better than the other one




    how I do it is to emulate the desired pipe run on it's centerline with heavy fill rod

    that is, bend the fill rod to go where you want the pipe to run and that be your template

    then figure out what I have to cut and where to make it happen

    you can do better but I know very well what it is like to have them done and choosing to live with "almost" and thinking.....

    one of these days I am going to cut that section and and make it perfect
    Accidental inventor of the worlds fastest wearing rocker arms and other edible engine parts! Try my yummy blue cheese camshafts!

  9. #8
    Senior Member whiskeysid's Avatar
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    I chose to edit this post. It was originally more reactionary, somewhat angry, and not very concise.
    Memorial Day is for the honoring of those that died serving America. I think it's inapropriate and disrespectful to make anti-war comments in the same few sentences that one says "happy Memorial Day", and "thanks to those that served". Not that there's anything wrong with opposing a war or voicing one's opinion about it. But the time and place for it is not while honoring our war dead. I'm sure that many would disagree with me, though. Most of them probably haven't served.
    -Eli
    Sgt./USMC
    -the Rad Baron
    -\'72 CB350
    -\'72 Kawasaki H1
    -\'72 Yamaha R5/RD350 hybrid
    -\'77 XS650
    -\'47 Harley U flathead
    -a bunch of other old Jap bikes

  10. #9
    Senior Member whiskeysid's Avatar
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    I chose to edit this post. It was originally more reactionary, somewhat angry, and not very concise.
    Memorial Day is for the honoring of those that died serving America. I think it's inapropriate and disrespectful to make anti-war comments in the same few sentences that one says "happy Memorial Day", and "thanks to those that served". Not that there's anything wrong with opposing a war or voicing one's opinion about it. But the time and place for it is not while honoring our war dead. I'm sure that many would disagree with me, though. Most of them probably haven't served.
    -Eli
    Sgt./USMC
    -the Rad Baron
    -\'72 CB350
    -\'72 Kawasaki H1
    -\'72 Yamaha R5/RD350 hybrid
    -\'77 XS650
    -\'47 Harley U flathead
    -a bunch of other old Jap bikes

  11. #10
    Moderator joe c's Avatar
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    whoa......take it easy there....

    nice pipe. that fucker is going to be loud!

    id go the opposite direction from hack. rubber isolators. mcmeaster sells em. if you rigid mount it, theres a good chance youll get some cracks. leave the front the way it is, and use an isolator at the back. i have no problem with the single springs. you can always safety wire the loops together.



    not a pretty boy honda rider... i\'m fag on a TTR

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