Swapped the OEM Dunlop for PR3's as soon as they came into country (after loosing the rear in the dry and sliding it). Have now ridden 6K+ through the sub tropical winter here (read lots of rain) and they are outstanding. Never lost any grip front or back very confidence inspiring in the dry to...
Hi I did mine with 14mm a while back (I just happen to have the drill bit) and no real difference. So I've now gone up to 22mm and Yes it is slightly raspier rather than throaty. No real power difference either way but the noise is much better, less like a hair dryer. So should you do it, Yes...