heres a few more facepalms for you
YouTube - Yamaha Blaster Burnout
YouTube - My yamaha blaster 250
me: yea man its not a 250
him: if its bored or has a new head it could be
me: no it can't. even if he has a 240 big bore, bored .020 over and a +3 stroker it is still only a 248. there is no physically possible way to make a yamaha blaster a true 250
him: still if you put on a new head you could.
me: umm no you couldn't. you can't gain 2cc from a head. all a head gives you is more compression
him: actually, on the yamaha 185 i had,we put i different head on the was bored to a 250, custim machined,
me: forget it it isnt worth arguing face+palm