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Converting t8f (8mm) chain/ sprockets to 410h (bmx chain) on my China Evo

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  • Converting t8f (8mm) chain/ sprockets to 410h (bmx chain) on my China Evo

    I am completely fed up with Chinese junk.
    I bought a new 8mm chain, a new 14t front sprocket, and a new 54t rear about 250 miles ago and they are now shredded.
    I am done buying 8mm/t8f/05T drivetrain. I would bet that 25h lasts longer.
    My objective is to source and fit a front and rear 410h sprocket that will fit my Uber 2x/ Chinese evo.
    So far the easiest way seems to be ordering 410h sprockets for an "X" series pocketbike.

    Can anyone think of any reason why this wouldn't work? Any reasons to not swap the 8mm for 410h? Any suggestions welcome. Except don't tell me to get a gsr because I just don't have that kind of cash!

  • #2
    As long as you can find splined sprockets that will fit the output shaft of the tranny, I see NO reason to swap to a chain that didn't act like grandmas stretch pants. The chain on my Uber EVO streched just riding it up and down my short street one time. So much, that I adapted this Slakinator (for an ESR) to work on the EVO. So, I for one am interested in what you come up with.
    Attached Files
    CP......
    HOW we ride today, may determine IF we can ride tomorrow

    Comment


    • #3
      Here is why I think it is possible.

      http://m.ebay.com/itm/43cc-49cc-Pock...-/272280848906

      The drive sprocket is definitely splined the same as my Evo's output shaft.

      I am not sure that the rear sprocket bolt pattern is the same, but it appears to be close enough to be able make it work.

      Now I'm just trying to figure out how limited I'll be with gearing options, and how many teeth I will need to achieve a final ratio that is similar to my current 14/54

      Comment


      • #4
        Doing a bit of research...

        It would appear that the problem is not the size of the chain...
        It is the quality..

        T8f (8mm) chain didn't exist until the advent of Chinese quads and scooters.
        I have searched, and cannot find one reputable company that makes T8F chain......

        I would be slightly concerned over the size of the sprockets, when using 410 chain..
        1/2" pitch makes for large sprockets at a relatively low teeth count.

        Moving to #35 (3/8")chain and sprockets seems a worth while job..
        Used extensively in industry... all the major company's make the chain..
        Go-Karts use it, so huge range of sprockets available..
        Here is a link to a massive length of Tsubaki Chain.. http://www.ebay.co.uk/itm/Tsubaki-RS...sAAOSwgQ9VsGZl
        Tsubaki make extremely high quality chain.

        The #25 chain can last if good quality parts are used..
        So it should be no problem for #35 chain..

        Google #35 chain or #35 sprocket..
        See how many items come up...
        ... J.
        There is nothing that cannot be fixed with a good cup of Tea.

        Comment


        • #5
          Originally posted by shenanagins View Post
          Here is why I think it is possible.

          http://m.ebay.com/itm/43cc-49cc-Pock...-/272280848906

          The drive sprocket is definitely splined the same as my Evo's output shaft.

          I am not sure that the rear sprocket bolt pattern is the same, but it appears to be close enough to be able make it work.

          Now I'm just trying to figure out how limited I'll be with gearing options, and how many teeth I will need to achieve a final ratio that is similar to my current 14/54
          A 410 sprocket with 54 teeth....... would be 9" in diameter..
          How big is your wheel....

          The link you posted.....
          It is still cheap junk... and may not get you any better life expectancy..
          Size doesn't guarantee quality, or longevity... Ask my wife..
          ... J.
          There is nothing that cannot be fixed with a good cup of Tea.

          Comment


          • #6
            Originally posted by MrTea View Post
            Size doesn't guarantee quality, or longevity... Ask my wife..
            ... J.

            A long stiff chain is not desirable when it cums to scooters. Wife's....that is a different story
            CP......
            HOW we ride today, may determine IF we can ride tomorrow

            Comment


            • #7
              Originally posted by MrTea View Post
              Size doesn't guarantee quality, or longevity... Ask my wife..
              Rofl

              If I wasn't limited to 200 characters, I would put this in my sig.

              +1 on the #35 chain. Had to use #35H on my electric because of all the torque. Even the regular 35 stretched badly.
              50mph+ Electric Ped
              KT100 GTR

              Comment


              • #8
                Here is a pic with the tire removed to better show the Slakinator actually putting light and adjustable tension on the rather elastic chain.
                Attached Files
                CP......
                HOW we ride today, may determine IF we can ride tomorrow

                Comment


                • #9
                  Thank you guys for your input.

                  I have seriously considered #35, and also #219h.
                  The only issue I have with these two chain sizes is the amount of customization that would be required to make the sprockets work. Especially the drive sprocket. I imagine having it done probably wouldn't be easy or cheap.

                  Lmao I agree, size doesn't always matter but according to my wife it sure can help keep things well lubed!

                  But in all seriousness, I have never in my life seen bicycle running gear fail as fast as t8f. Even in motorized applications.

                  I remember the gearing on my death trap scooter that I built a few years back out of a 66cc motorized bicycle engine.

                  It was 410 sprockets at 11/18 and it performed awesome, but I have no idea what the ratio of the gear reduction in the clutch case on the engine was, or how that would come into play in this situation. I guessed and got lucky with that project.

                  Edit: That slakinator is awesome! I have played with a few tensioner ideas, but your setup is far superior to any of mine. If I can't get this chain swap idea to work I will definitely be revisiting that idea.
                  Last edited by shenanagins; 08-25-2016, 12:48 AM.

                  Comment


                  • #10
                    Show pictures of the death trap scooter
                    Matt Etchells
                    Flash-Systems ltd.

                    [email protected]

                    Comment


                    • #11
                      Originally posted by Mattetch View Post
                      Show pictures of the death trap scooter
                      I made a thread about it awhile back. Here's a link. http://www.billetboard.com/showthrea...6cc+death+trap Links to pictures are in the thread. It's really nothing special but it was fun while I had it.

                      Comment


                      • #12
                        So today I finished the conversion to 410 sprockets and chain. I ordered a 15t drive sprocket for an x1 pocket bike, and made my own rear sprocket using the middle drive sprocket from a mountain bike, and the factory t8f sprocket.20160906_170213.jpg20160906_170426.jpg

                        First impression was it's so smooth! And quiet! Even with rusty old chain.
                        As I feared, the gearing is much too high at 15/36. It goes about 30 mph in 1st gear and it won't pull 2nd. I figure if I gear it around 12/42 it should do pretty well, but I plan on doing the 42t in the rear first to get an idea. I apologize for the amateur photo's, but my galaxy s7's awesome camera makes up for it a bit at least.
                        Attached Files

                        Comment


                        • #13
                          Originally posted by SJ View Post
                          Here is a pic with the tire removed to better show the Slakinator actually putting light and adjustable tension on the rather elastic chain.
                          Mind elaborating on your setup a Little more? where did you get the white wheel and bearing for it? Did you have to buy the complete ADA tensioner for those? I see they sell the wheel but not the bearing seperate


                          thanks is advance.
                          Trail ripper 460. ADA & DDM components.

                          Comment


                          • #14
                            Success! I installed a 48t rear sprocket today and went for a good long ride. Punished it as hard as I could and held up great.
                            I know it looks huge, but no clearance issues making tight right turns. Also ZERO chain stretch.
                            The gearing is 15/48 and is a little higher than it was with the 14/54 t8f gearing. Gps'd at 36mph on flat. Gets into powerband but does not rev as high as before.
                            Would probably hit 40 with a pipe but I'm just gonna save that money for a 63cc.
                            The only thing I'm not liking about the large rear sprocket is that it might get the chain dirty faster and it's pretty ugly. But it is functional and I don't have to wait for shipping on t8f chain anymore!

                            I will keep updated on reliability. I ride this ped at least 10 miles every single day. Trust me, that gallon fuel tank is very necessary lol
                            20160909_192924.jpg
                            20160909_193034.jpg
                            20160909_193011.jpg
                            20160909_193046.jpg
                            Screenshot_20160909-194817.jpg

                            Comment


                            • #15
                              Fascinating. I'm also curious about how well this works for you.
                              2 Sports and a GSR40

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