Lifan 140 with z40 install

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Lifan 140 with z40 install

This is a discussion on Lifan 140 with z40 install within the Chinese/Import Minis - General Discussion forums, part of the General Talk category; Ordered a kit from eBay, came with z40 cam, race Springs, and 32t cam sprocket. Does the 32t cam sprocket work for the motor? Do ...

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    Lifan 140 with z40 install

    Ordered a kit from eBay, came with z40 cam, race Springs, and 32t cam sprocket.

    Does the 32t cam sprocket work for the motor?

    Do I have to open up the timing chain tensioner to fit the 32t cam sprocket?

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    Count the teeth on the cam sprocket that came with the engine
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    Quote Originally Posted by dirtbkr188 View Post
    Count the teeth on the cam sprocket that came with the engine



    28 is what came out

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    You have two options:

    1. use the 28T sprocket with the new cam

    2. remove and replace the 14T crank sprocket with a 16T and then you can use the 32T sprocket, but you will need a longer cam chain
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    Quote Originally Posted by dirtbkr188 View Post
    You have two options:

    1. use the 28T sprocket with the new cam

    2. remove and replace the 14T crank sprocket with a 16T and then you can use the 32T sprocket, but you will need a longer cam chain



    After doing more reading I now understand the ratio.

    So issue behind the 28t vs the 32t is, the 28 has 3 mounting holes where the 32t has 2 holes.

    I've tried searching for a 28t 2 hole that is verified to work for the z40 cam but nothing yet.

    I found several on eBay that are 2 hole 28t, but doesn't say it's for the z40 cam.


    Here's a link to what I found. I appreciate the help. Let me know what you think about this sprocket.

    https://www.ebay.com/itm/302155851143

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    Some of the Chinese 3-hole cam sprockets will work on a 2-hole cam, did you try setting the 28T on the Z40 cam to see if the holes line up?
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    Quote Originally Posted by dirtbkr188 View Post
    Some of the Chinese 3-hole cam sprockets will work on a 2-hole cam, did you try setting the 28T on the Z40 cam to see if the holes line up?

    I did not try that. Looks like I'll be giving that a shot this evening. I appreciate the help!

    I also ordered the 28t 2 bolt cam sprocket. Looking forward to hearing this bike fire up.

    I port matched the intake manifold, ported and polished the head, really wanna hear this thing thump and see what gains it made ?

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