Just to clear up a little confusion, all new RCMAX engine complete packages come factory ported as standard inclusive in the price.
We have increased power output 9% on the 46cc from the past RCMAX46 engines with 14% more HP at 17500rpm where you guys spend most of your time running your RCs!
All RCMAX71 engines come included with the latest edition Stage 6 MK2 Racing Cylinder kit hand ported to suit the RC application. This cylinder was chosen as it has proved itself to be more powerful at 10,500rpm + than any other cylinder on the market today during our pre-release dyno testing.
Hope that answers some questions ive seen asked recently and helps you understand why we are so confident the latest edition motors are the best you can buy.