The NEW Z Files. Honda Z owners.-official

Discussion in 'Z-Minis' started by 120 fly, Sep 30, 2006.

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  1. Sep 30, 2006 #1

    120 fly

    120 fly

    120 fly

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    Honda 50z engine build up

    Hi all Im currently building a honda z50 engine .3 speed all down 83model.
    The bore im using is a honda 85cc barrel bored out to 48.5mm .
    I decided to use a head off an early model honda 90cc posty engine the port work is now done ,
    What i do need is a set of larger valves can somebody tell me the size of the valves in the lifan engines the valve stem must be 4.5mm thick ?
    Once i sort some valves out i can choose a cam and some valve springs ,All in all i hope the engine performs well. im now saving for an inner rotor kit for it and a decent carby any help appreciated cheers geoff....
     
  2. Oct 10, 2006 #2

    honda50s

    honda50s

    honda50s

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    import honda engine!!

    hey guys
    i was recently lookin on an international trade website (alibaba) and i found an engine i have never seen before.:eek: its a honda engine for sure. but its manual, has glossy black sidecovers and is either 110cc or 125cc's. if i could attach a pic i would. but i cant find a way how to. if u go to www.alibaba.com and then type in crf50 in the website search, it should come up in the results. check it out guys. looks wicked.:cool: it would be sooo good to finally have a pitbike engine with a manual clutch, that is as reliable as a honda!!
     
  3. Oct 10, 2006 #3

    Stunt101

    Stunt101

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    it's been that way since the Z50 days! it's only the side cover you have to change!
     
  4. Oct 10, 2006 #4

    honda50s

    honda50s

    honda50s

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    but i neva seen it before. its lyk a pitbike engine, but a honda. the only thing 110cc honda i have seen is a posty motor
     
  5. Oct 10, 2006 #5

    Stunt101

    Stunt101

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    Yeh you can turn a honda motor into a manual 107cc with a case / stroker crank & 88cc bigbore kit. that's what they were doing for the Mini racers before KNOCKOFFS were invented. the engine would'nt be straight from honda.
     
  6. Oct 10, 2006 #6

    honda50s

    honda50s

    honda50s

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    i meant just without the expense. a complete manual 107cc motor that is japanese. yeah i know about the big bores and strokers with manual clutches, but thats heaps expensive. i just thought ide show everyone. lol im not gettin one. i already ordered a 75cc kit.
     
  7. Oct 11, 2006 #7

    crazzy #1

    crazzy #1

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    is the original bore on the 50cc engines to small to be bored to 88c? not enough meat in the bore is what im trying to ask
     
  8. Oct 11, 2006 #8

    eichkay

    eichkay

    eichkay

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    Wow good find, thats the honda NICE motor, These are a hot choice for bigger builds in the UK and US upto 141cc and they a very strong motor...

    These are what the chinese copy'd and made the Lifan/Jailing/GPX motors from. But its the metals the chinese used that let there motors down. 500Euros aint too bad either, $850AUD but you'd have to buy quantity's.
     
  9. Oct 11, 2006 #9

    honda50s

    honda50s

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    they should be able to bore it. im not sure.

    how do u know so much about this motor eichkay?
     
  10. Oct 11, 2006 #10

    Stunt101

    Stunt101

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    No a STD barrel will not go to 88cc (52mm) you need a 70cc barrell (47mm) and go from there or get a real 50 - 52mm barrell. & i'm not making it up i wholesale Motorcycle engine parts for a living!
     
  11. Oct 11, 2006 #11

    Stunt101

    Stunt101

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  12. Oct 11, 2006 #12

    honda50s

    honda50s

    honda50s

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    that means its just as good though doesnt it?
     
  13. Oct 11, 2006 #13

    eichkay

    eichkay

    eichkay

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    Yes, its what the serious guys in the UK use for there Monkey Bikes project use.. Very good motors , Its what i want for my CT70 but last time i saw them they were around $1200 US to buy
     
  14. Oct 12, 2006 #14

    Stunt101

    Stunt101

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    Sorry guy's i was not a happy chappy yesterday.

    but yeh just as good if not the same motor! i here that 75% of a CRF50 comes from these NON japanese companyies.

    but i found the best place for Honda engines or most parts is the Wreckers. IE: Perth M/C Wrk has every thing and good price too. that's were i got most of my spare engine from.
     
    Last edited: Oct 12, 2006
  15. Nov 3, 2006 #15

    Power Man

    Power Man

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    My Honda Z50a 1971

    hey,
    i got a z50a k2 (1971) its an australian type has blinkers, and can be regoed! , at the moment its being restored, and i hope to put a 75cc kitaco bore kit on it . Getting everything redone , i will be able to put some photos of my painted & my polished hubs , anyways if ne one has ne 1960 - 1970's z's post em up ;)


    [​IMG]
     
    Last edited: Nov 3, 2006
  16. Nov 14, 2006 #16

    mad man

    mad man

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    cool, paint the rims and get the frame done
     
  17. Nov 20, 2006 #17

    binky77

    binky77

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    thats a sik little bike! how much was it
     
  18. Dec 5, 2006 #18

    50s BRotherhood #1

    50s BRotherhood #1

    50s BRotherhood #1

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    hey bro nice z50 lookin snazzy!........i got a honda z50 to except a 73, everthin on it is original except the blinker cover and it starts 1st kick every .... i also hav a old honda minitrail but i dont no wat year it is, i hav mad a few modes on that like a 72cc oringinal honda engine.. really loud exhust and custom clamps... ther r good fun
     
  19. Dec 6, 2006 #19

    mikep

    mikep

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    Thats similar to my mates one.in the picture). It's neat as. It has a custom made big bore kit (103cc's with the standard stroke) and heaps of other goodies. It's registered and is heaps of fun on the road.
     

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  20. Dec 6, 2006 #20

    crazzy #1

    crazzy #1

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    looks like someone has run into something! ur forks are bent!
     

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