Anyone bore and plate a 125 cylinder to fit 144 piston?

[sbest]

Anyone bore and plate a 54mm 125 cylinder to fit 56mm 144 piston?

It increases the displacement by 8cc for about $80 extra cost. What are the pitfalls? 

 

[TommyB 754]

The cost will be much greater then $80. Bore $50-100. Plating $200. Shipping $50. New piston $100. At that point you would be close to just buying a cylinder, then reselling your 125 cylinder to recoup cost.

[Singletrack_rider]

This mod is rarely done. If you look at the cylinder bore you may see why. The power valve would need to be modified or an offset bore. The offset bore would screw up the rear transfer port. I looked into this myself 2 year's ago.

[sbest]

On 8/10/2017 at 2:29 AM, TommyB 754 said:

The cost will be much greater then $80. Bore $50-100. Plating $200. Shipping $50. New piston $100. At that point you would be close to just buying a cylinder, then reselling your 125 cylinder to recoup cost.

Actually. I am due for a replate anyway, so it is only $80 more to bore it 2mm larger. 

The powervavle seems easy enough to profile and the rear tranfer port has plenty of meat:

I'll still look these areas over very closely. any other concerns?

 

Is the 144 flat or domed piston?