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Dual to single exhaust question.. among others

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  • #1

    Dual to single exhaust question.. among others

    So I recently decided that unless somebody offers a trade for another CRX I'm going to keep my kat. That being said, there is a lot of work I want to do to it. Keep in mind this is the 750 in the 600 bike.

    1. Exhaust - Currently the bike has on stock (at least I think so) dual exhaust. When the kick stand goes up it has to go above the exhaust pipe or the bike won't stay running when it is in gear. So my first question is, those with only a single exhaust, does the kick stand stay up or is there another bracket that would need to be installed? As far as exhaust I'm super broke so I'll be trolling ebay looking for a slip on that I could pick up for ~$50. I'm assuming I'll need a mid pipe, but what do I do as far as headers? I can't remember but I'm betting they are 4-2 while I'd be wanting 4-2-1 or 4-1 (by the way which would be best if I had all options presented).

    I've read some posts that state with a slip on you don't need to rejet, is that the real deal? Since the bike currently has dual exhaust, how different will the bike run with everything changed to a single slipon?

    2. Rear rotor - So the guy before me ran the crap out of the pads and the rotor is pretty bad. My brother in law does machining work and he said he could take it and shave it down for me. My question is would that work out? I really don't want to have to buy a new rotor.

    I guess I'll keep it at that for now...
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  • #2
    Whew..
    You can't add a slip on with a stock pre 98 exhaust. Slip ons go on 98+

    If you want single exhaust you need a 4-1 header, a mid pipe and a end pipe (muffler). The stock exhaust is only 2 pieces. Left and right.. the length from the engine port to the tip of the muffler is one welded piece.

    About the stand. Hmm the switch as I recall has a tab that would prevent the stand from over pressuring the switch. I think you should be OK there.

    Now the rotor. There is a minimum thickness for the rotor. Maybe Arsenic can spit it out for you. Other than that if your brother knows what he is doing he can machine that rotor just fine. Keep in mind of you go under the thickness in the book what is likely to happen is the rotor will over heat and warp. Or maybe nothing. It depends on your use..

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    • #3
      Troll Ebay and the classifieds and look for a 98+ Katana header. Heck you can bolt on the entire exhaust to get rid of the dual.

      Also you'll either need to dent the collector on the header to fit your pre 98 oil pan, or you can bolt on a 98+ oil pan and pickup.

      I went thru Ebay.

      Got the header, the Scorpion slip on, the oil pan and pickup, and with everything to install it, I'm still into it less than JUST a slip on exhaust....

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      • #4
        if I knew the year and cc's I could tell you all the rotor measurements.

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        • #5
          You won't need to jet with a slip on.

          You will have to dent the 4 into 1 collector to get it to fit the bike though.
          -Steve


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          • #6
            Originally posted by steves View Post
            You won't need to jet with a slip on.

            You will have to dent the 4 into 1 collector to get it to fit the bike though.
            On a stock 98+ exhaust

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            • #7
              Originally posted by arsenic1016 View Post
              if I knew the year and cc's I could tell you all the rotor measurements.

              Well I'm going to assume the rotor is from the bike and not the bike the motor came from... If that is the case then it is a 95 600.


              Thanks for the help guys

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              • #8
                Originally posted by stingray2772 View Post
                Well I'm going to assume the rotor is from the bike and not the bike the motor came from... If that is the case then it is a 95 600.
                Actually the engine size doesn't matter, either does the year.
                The rear rotor is the same for Kat 600/750s 89-96

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                • #9
                  Originally posted by Black_peter View Post
                  Whew..
                  You can't add a slip on with a stock pre 98 exhaust. Slip ons go on 98+
                  thats not exactly true, the Cobra F1's are a pre 98 slip on, but there are 2 of them and they aren't exactly slip on's, you have to cut the stock cans off.

                  Disc thickness (rear)
                  Standard - 6.0 +/- .2mm (.236 +/- .008 inch)
                  Minimum - 5.5mm (.220 inch)
                  Disc run out maximum - .30mm (.012 inch)
                  Last edited by arsenic; 01-20-2008, 12:41 PM. Reason: Automerged Doublepost

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                  • #10
                    Originally posted by arsenic1016 View Post
                    thats not exactly true, the Cobra F1's are a pre 98 slip on, but there are 2 of them and they aren't exactly slip on's, you have to cut the stock cans off.
                    OK so then it is true; there is no slip on for pre 98..

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                    • #11
                      right, that is true, there is no "slip on" for a pre 98. Well Peter, if you want to split hairs here, the muffler does in fact "slip on" it just doesn't function like a slip on.

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                      • #12
                        Ok, so the cobra F1s are to be for the dualies? If that is the case I might check them out (if it would save money)

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                        • #13
                          it won't save money, you can't really find them, then you have to cut the old mufflers off and have the new ones welded on. I just said that to argue with Peter, they are basically worthless.

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                          • #14
                            I didn't think you could machine cross drilled rotors since the needle will just get caught in the holes of the rotor... at least thats what I learned in mechanics class.
                            Last edited by Disturbedperson; 01-20-2008, 02:37 PM.

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                            • #15
                              Originally posted by arsenic1016 View Post
                              it won't save money, you can't really find them, then you have to cut the old mufflers off and have the new ones welded on. I just said that to argue with Peter, they are basically worthless.
                              The Cobra's aren't welded... they clamp on.
                              -Steve


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