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boring

This is a discussion on boring within the 2-Stroke Motorcycles - Yamaha forum, part of the 2-Stroke Motorcycle Forums category; Its a little early to be posting this, but my question is about boring out my 125. I have an ...

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  #1  
Old 09-27-2004, 06:41 PM
zachrider's Avatar
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Default boring

Its a little early to be posting this, but my question is about boring out my 125. I have an 03 yz125. Ive only ridden it twice before and I dont plan on boring it soon, but Im just curious. What is the most you can bore out a 125 without having problems? How much would it be to bore it out? Say I way to bore it out to 175cc, how much of a hp gain would I have? Is it enough to were it would seem like a totally different ride or should I just outgrow it and go to a 250? thanks, zach
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Old 09-27-2004, 07:14 PM
YZ145's Avatar
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Default Re: boring

Max powers gots a 155cc stroker kit, it puts out close to 40 hp. But unless you got money to burn or you think the gains are worth the price look else where. "ONLY $1500.00" As fare as how much you can bore it out, I think RPM has a 167 kit for the yz.
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Old 09-27-2004, 07:20 PM
zachrider's Avatar
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Default Re: boring

If boring my bike is going to be 1500 bucks, I wouldnt think twice about not boring it.
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