plugs

[lotus791]

keep some #5 plugs as well as #6   when the air temp is low approx below 10 or 12 c  run the #5.   the engine likes to rev  and so far any testing i have done has shown it likes its own brand of plug the best

[MR Piraterc]

Have you tried using RB plugs ?

[lotus791]

yes and i prefer its own plug. take the head button in your hand and screw both plugs in and look at how the shape of the combustion chamber changes ,this alters the characters of the engine  im not saying it wont run on them  just that i feel it runs better on its own plug the power band is a lot smoother .