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Discussion Starter · #1 · (Edited)
  • Hii everyone so I was wondering is it possible to replace the piston , cylinder and valve assembly with something like a KTM Duke 390's engine ?? ... Basically a 390cc big bore kit for g310r ..
 

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2017 BMW G310R
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A bigger engine means more torque, so more stress on the gearbox and a need for better brakes.
All these mods are neither obvious nor free ...
And I'm not talking about all the "little" things aside (various adapters, injection and exhaust settings, etc.)
If it is possible to increase the diameter of the cylinder, this is a better way to achieve what you want, even if the above safety concerns persist.
 

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For the amount of money it will cost, you would be better off buying a bigger BMW bike. Probably not possible to increase the bore diameter that much as this would make the cylinder walls too thin.
 
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