Thread: engine size

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    engine size
    #1
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    Would a 750 bike engine be enough for an st3? I'm starting to plan ahead before i begin building anything. I just don't want to build a cool looking buggy that ends up being a turd in performance land.


    Thanks.
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    Re: engine size
    #2
    Senior Member ErwinBnl's Avatar
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    Hey!

    Have you done some research?

    Giorgos has build a ST3 also, with a quite old 750cc engine! It works great as you can see on his movies.

    His topic is in this same group, look it up and read it.

    https://www.minibuggy.net/forum/st3/1...tml#post248218

    Good luck!
    Erwin
    I'm building my personal Badland's ST2 Long Travel
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    Re: engine size
    #3
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    I do remember seeing that build. I must have forgotten what size of motor he had used.
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    Re: engine size
    #4
    Senior Member gvouvakos's Avatar
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    hello

    I have used an old 750cc yamaha engine, and with the right gearing the acceleration is great and i can reach 80 mph

    However a newer fuel injected engine 750 cc would kick ass on the st3
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    Re: engine size
    #5
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    What horsepower was that 750? Thinking of using a raptor 660 or 700
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    Re: engine size
    #6
    Keeper of the Asylum K-fab's Avatar
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    Quote Originally Posted by cdnjaguar View Post
    What horsepower was that 750? Thinking of using a raptor 660 or 700
    A four cylinder 750 should easily make 130-140 hp.

    The Raptor's making 40ish - there's a recent post with a dyno sheet on the 700's output.
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    Re: engine size
    #7
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    Oh it's a 4cyl. Starting to thing a raptor engine may not be enough... How would you rug up a reverse gear if one went with a 750 cc 4 cyl?
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    Re: engine size
    #8
    Keeper of the Asylum K-fab's Avatar
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    There are a few options for reverse. The RPM trans is the best, but it's on the pricy side. You can also do the starter/ring gear setup. There are a few guys here running them. I think Glock has it, Yoshi did it, search or wait for someone to pop up and post. Did Mr Bracket have that setup?
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