Originally Posted by Pleiades

Stage 3 airbox cover does make a difference, but only with fuelling adjusted to suit. There is a considerable increase in airflow over a Stage 2 setup. Almost all the power gains from fitting a Stage 3 cover will come at the top end from 5000rpm and upwards.

As for the plugs... TBH, I can't tell the difference between a standard and iridium plug on the Z and neither between heat ranges 7 and 8! However, there are plenty of people who swear they can "feel" the difference...

Originally Posted by jasonsean484

thankyou pleiades . i was hoping you,d reply , i think i will leave alone now then and just enjoy , thanks again

Originally Posted by Pleiades

I rode for five years with a Stage 2 setup and was more than happy with it. When you get bored one day and fancy a change, just fit a Stage 3 kit and get down the dyno like I did and inject a bit more life into the motor. Always good to do mods in stages - you'll notice the difference more vividly, plus it keeps you interested the bike!