I have ordered a 136cc malossi kit, grand sport piston for this kit and the mmw cylinder head. Now i ordered this 38543700 while i believe i should have ordered this one 38543800.
Will this head still work with the grand sport piston or better to send it back and swap it for the 38543800?
And another question is if i need to make any modifications to the cylinder barrel using the grand sport piston. I am running a direct reed valve onto the barrel.