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Old 10-20-2009, 09:22 PM   #1 (permalink)
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engine swap on yz80

hey guys, i am in the process of getting a supermoto yz80. i was wondering what is the biggest motor that i could fit into the frame without having to cut and weld. i could make the bracket but i do not want to cut the frame. the bike is going to be set up for racing mini supermoto. please if you have links or ideas post them up
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Old 10-21-2009, 02:31 AM   #2 (permalink)
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Re: engine swap on yz80

Without changing anything, the motor that comes in it is the only motor that will fit.... you can get 112cc's out of a YZ85 motor if you stroke it. --L*64
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Old 10-21-2009, 09:41 AM   #3 (permalink)
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Re: engine swap on yz80

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Originally Posted by Luckystar64 View Post
Without changing anything, the motor that comes in it is the only motor that will fit.... you can get 112cc's out of a YZ85 motor if you stroke it. --L*64

the problem it does not come with a motor. i am welling to make some modification
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Old 10-21-2009, 09:45 AM   #4 (permalink)
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Re: engine swap on yz80



We put a crf 100 motor in our.
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Old 10-21-2009, 12:56 PM   #5 (permalink)
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Re: engine swap on yz80

What does take to do it?? Any power gain
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Old 10-21-2009, 01:00 PM   #6 (permalink)
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Re: engine swap on yz80

No power gain the yz motor makes 17 hp and the crf 100 makes 10hp
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Old 10-22-2009, 02:29 AM   #7 (permalink)
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Re: engine swap on yz80

Haha! More like 6! I'd go on Ebay, and look for a trashed YZ motor, and rebuild it really nice the way you will need it for roadracing. I'm talking with a balanced crank... big bore... nice FMF pipe, etc.... ---L*64
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