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1986 yamaha moto 4 200 rebuild


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The best way to find that out is to look up the part number for the cylinder for each bike and see if the number is the same.  

I looked up the part number for the 200 and 225 and it was the same so it could work. But keep in mind that all shit rolls downhill when you upsize it’s re-jet for the carburetor, exhaust may be tight with too much back pressure, so you can’t just go with a bigger piston and think your going to be ok.  I would prob go the route of boring the existing cylinder and re-jet the carburetor in accordance with the bore and piston size.  As far as exhaust goes after that it would be a matter of changing the silencer/baffle. 

 

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