701 or 760 ?

[Polar Bear]

whats the max. size you can bore out each cylinder before having to sleeve them ? Is it better to use a 760 cylinder rather than a 701 to bore out to 85.5mm or 86mm ? sorry for the dumb question :smile:

 

[SuperJETT]

The ideal setup is a 701 resleeved then bored out so you get the porting of a 701 but the displacement of the 760. 701's can go to 83mm safely, 84mm is possible though the sleeves get thin. I'm not sure on a 760.

 

[WaveDemon]

The ideal setup is a 701 resleeved then bored out so you get the porting of a 701 but the displacement of the 760. 701's can go to 83mm safely, 84mm is possible though the sleeves get thin. I'm not sure on a 760.

on the 760 you can go 85.5, 86 is a little to thin.

 

[WaveDemon]

also expect the hit on the 760 to be at a little higher RPM than the 701

 

[Polar Bear]

so if you had to pick a cylinder to port & bore, what would you go with? stick with the stock 81mm 61x i have now, and get paul to port it, or get a 760 and play with it?

 

[WaveDemon]

so if you had to pick a cylinder to port & bore, what would you go with? stick with the stock 81mm 61x i have now, and get paul to port it, or get a 760 and play with it?

I have a ported and bored 86mm 760. I'd rather have a ported and bored 61x.