dio top end on 93 and back lower?

Corey · Post by **Corey** » Mon Sep 08, 2008 12:46 pm

wont a dio top end bolt on the older lower end? there is diffrances in the intake port area right? so cant we grind and match the lower to match the upper?

Dac · Post by **Dac** » Mon Sep 08, 2008 1:41 pm

i would assume with time on your side you could do it.
my only concern would be the crank, the 93 and under SA50s have a 40mm bore, where the 94+ only have a 39mm bore, yet there both 49.9 cc.
The bore and the crank determine the cc, so if the cylinders are different, but they are both 49cc, then logic tells us that the crank is different.

do some research before you attempt anything.

Clivester · Post by **Clivester** » Mon Sep 08, 2008 6:39 pm

Also the pre-94 SA50s have a 10mm piston pin while the Dios are 12mm.

Clive.

Corey · Post by **Corey** » Mon Sep 08, 2008 10:07 pm

so i would need a custom piston. if the bore in smaller on the dio than the stroke must be longer.

Kenny_McCormic · Post by **Kenny_McCormic** » Tue Sep 09, 2008 5:20 pm

its not worth it

losthope · Post by **losthope** » Tue Sep 09, 2008 7:53 pm

Corey wrote:so i would need a custom piston. if the bore in smaller on the dio than the stroke must be longer.

even then compression would be lower and port timing would be off