PHBH FD vs PHBH BS

[Svint1]

Hello!

I'm currently running my Polini218 engine with a Delly PHBH BS 30mm

But to get some better response in lower revs, I will try a 28mm.

But the 28mm is a PHBH FD.

Beside to plug the intake for the oil-pump, is there anything else I have to do to use the PHBH FD 28mm?

(any suggestion for jets, as I'm using a SIP Evo pipe?)

Best Regards,

Øyvind