Need help installing Li-fan 125 into st-90 : i'm a noob

Discussion in 'Lifan' started by nsolcis, Sep 6, 2012.

  1. nsolcis

    nsolcis New Member

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    hey guys, long time listener, first time caller...

    I have an st-90, I want to install the li-fan 125 engine,
    I found this kit on ebay

    NEW LIFAN 125CC ENGINE MOTOR PIT DIRT POCKET BIKE COMBO KIT | eBay

    Can you tell me what else I would need to purchase?:39:
    I want to do the 12v upgrade I've seen yall talking about, but not sure what parts to get...
    I am also interested in setting up the push button start...

    any way you guys could give me a parts list with links to dr-atv or any other site with said parts?

    I know this is asking alot, :22: and I really appreciate the help!

    thank you in advace :p
     
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  3. nsolcis

    nsolcis New Member

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    I would be more then willing to kick down $10 to whoever can answer my questions
    thank you!:77:
     
  4. Adam-NLV

    Adam-NLV Well-Known Member

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    Just off the top of my head It looks like you need a 12v wiring harness and rectifier module. It comes with a engine harness. This L125 is not electric start so setting up a push button start is not an option here.
    dratv.com has these parts, look in their Lifan engine replace Section.
     
  5. kirrbby

    kirrbby Well-Known Member

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    Im not familiar with the st90's but im pretty sure the motors do not interchange with the z50/ ct70's. And st90 is not on the seller's list of bikes that this motor will fit. You would have to modify your bike to fit this motor. If it's even possible.
     
  6. Adam-NLV

    Adam-NLV Well-Known Member

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    Took a quick look but didn't see one at the DR. You should ask the seller what he recommends. Maybe he has a 12V lifan harness source.
     
  7. DCON

    DCON New Member

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    im going to do the same thing to two st90's this winter. i think the st90 motor is the same dimensions as the ct90 and ct110.
    they make an adaptor kit and its sold on dr atv. in the ct90 section i think.
    search "hugemoth" he has done it without the kit,(drilling required) to a ct90. should be the same set up. good luck
     
  8. boz

    boz Member

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    DrATV has a page devoted to this here.
     
  9. nsolcis

    nsolcis New Member

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    boz, that is for a ct90, and a 140 lifan, is it the same? seems like it would be different...
    this one lists st90k2 and st90k1, i'm guessing the green st90 is the k1 and the yellow is the k2?

    so this should work 'm guessing..

    SEMI AUTO LIFAN 125CC Motor Engine XR50 CRF50 70 SETS | eBay


    so then just get a 12v engine harness,
    12v battery
    12v bulbs (do I need to replace the sockets the bulbs go into?)
    12v rectifier module (could someone send me a link for this?)
    do I need to get a new muffler for my st90?
     
  10. b52bombardier1

    b52bombardier1 Well-Known Member

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    The ST90 engine is a three bolt engine mount. The CT90 engine only needs two bolts so plan accordingly.

    Rick
     
    #9 b52bombardier1, Sep 6, 2012
    Last edited by a moderator: Jul 17, 2017
  11. nsolcis

    nsolcis New Member

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