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Type: Posts; User: mzts250

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    info needed about flywheels and CDI

    I have a 253fmm engine. I am using a cheap generic GY6 orange CDI, AC version. I have about five flywheels from different engines and all of them are slightly different and I don't understand why.
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    What size is Zongshen 125 gudgeon pin?

    I'm experimenting building engines out of 244/253 parts and for my next project I need some high compression pistons. I was thinking of using 54mm Zongshen pitbike pistons but I can't find any...
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    Re: Need gearbox ratio information

    OK, that's some useful information but not sure which Honda gearboxes the Chinese engines copy. Probably the 244FMI are copies of CBT125, and the 253FMM are probably copies of Rebel engines. As far...
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    Need gearbox ratio information

    OK so this gets complicated.

    Here are some things I have discovered recently while tearing apart the 125, 150 and 250 twin engines and making engines for my bike.

    The engines I've been using...
  5. Thread: Engine swap

    by mzts250
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    Re: Engine swap

    A quick look at pictures of that bike seems to show that it probably uses a CG125 copy engine. There are many variations of that engine being made now under many different names in sizes from 125 to...
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    5 springs or 6 springs clutch?

    I am modifying a standard clutch as found on 244 and 253 engines. Normally they have 4 springs. I am wanting to upgrade the clutch because I sometimes pull a trailer, and it looks like the inner bits...
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    Different gears in different motors

    OK, so I've discovered that a lot of China bike engines use very similar clutches and that you can mix and match parts from other bikes to make special design clutches if you know what you're doing....
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    My strange motor

    Here's the motor I made using 244 and 253 parts.

    https://s1.postimg.org/25zhlaz33j/image.jpg


    The head is from an AJS Regal Raptor 125 engine (DD125E) because it has bigger inlet ports than...
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    Re: Looking for clutch info

    Yes this is the sort of information I'm looking for! I will check into it.
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    Re: Looking for clutch info

    Initially that is true, but different clutches can also be fitted to different engines so long as the splines on the gearshafts are the same or you change gearboxes.

    For instance I have made an...
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    Looking for clutch info

    I am wondering what other clutches fit the Honda copy 253FMM engine. I know it's basically the same as the 244FMI and many parts are interchangeable but I want to fit a six spring clutch to my...
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    Here's my China engined bike

    This is my MZ TS250 with a 253FMM engine in it. Not much of the original MZ is left, only some of the frame and the headlight shell. Everything else is a combination of other things.
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