B Race Stealth 26mm or 30mm Deli Phbh

[peter357bikes]

At the moment I am running a 50mm Gori race exhaust on an early Mugello 200 on a Sx 200 with a LTH reed valve fitted to a 26mm Deli open mouthed. (long sentence)

I am going to alter the piston to suit the reed valve.....

I now have a B Race Stealth pipe which I have been after for ages. Will the 26 mm deli suffice or would a 30mm be better all round. I want it for reliable fairly brisk touring...