Quote:
Originally Posted by DannoXYZ
Also new-gen intake-cams have 1mm more lift than exhaust. Some people installed intake-cam on exhaust side, but gains are minimal as intake-ports are primary restriction in head.
Easy way to port & polish head to remove restrictions along with getting 1mm larger intake-valves is to.... install Ninja 300 head!!!  |
I think 10% more lift on exh becomes very significant if you open up the inlet side.
About the 300 head. Another topic on this forum said they're identical? Quick googling tells me vendors offer the same 23,47 (or 23,50)mm inlet valve for both 300 and 250.
There's a reputable CNC-shop here in Finland that specializes in cam work. Haven't asked them for a quote and whether they'd be able to do work on these cams.