73mm bore?

[Adam_Winstone]

Hi all,

Does anyone know how close you can overbore to the main cylinder studs before bore walls become too thin and cause issue? We’re all familiar with photos of 4 point seizures that correspond with stud holes but I note that oversize pistons are now available up to 73mm, which would leave the bore wall very thin on the alignment with stud holes.

Anyone have experience of running 73mm bore in any of the kits/cylinders available, whether iron bore (e.g. Rapido) or plated alloy (e.g. TS1, RB, Mugello)?

Cheers,

Adam

[cgt75b]

Hi Adam

Running a 71mm forged piston in a cast barrel atm, I may eventually get to 73 I'll get back to you.

Cheers

Cgt75b

[Adam_Winstone]

^... ta