Noticeable improved torque/pulling power off idle to 6,500 rpm with new NGK Iridium IX spark plugs installed in my 2015 F3-S SE6 Spyder 1330cc in line triple engine.
Also noticeable increased quicker response torque/pulling power cruising at 80 mph and getting on the throttle hard.
A quicker start warm up with rpm dropping to smoother idle.
Bottom line:
Noticeable (seat of the pants) performance increased torque/pulling power with new NGK Iridium IX spark plugs (come pregapped at .032), over the stock spark plugs.
Contact BajaRon (a site sponsor) for new NGK Iridium IX spark plugs.
Note: a very difficult job changing spark plugs in my 2015 F3-S Spyder; probably worth the $$ to have BRP service mechanic change spark plugs, and new gas filter.
Enjoy your rydes.
Jim