I dont use resistor plugs in any 2 stroke unless I happen to get some in the bulk lots I buy at auction, recently I have gone onto the very cheap and generic "carlton" plugs with fantastic results, I buy them in lots of 20 and get them in at less than $3 each.

Since it takes a few months to foul a plug, there are a few questions I have, Is the fuel tap always turned off after use? Do you use the start position on the throttle? do you always run it on full throttle?

With all of my 2 strokes, I always start and run them on full throttle, if the carb is working correctly they will start first pull, if the fuel isnt turned off whole the engine is stopped, it can cause flooding and therefore fouling of plugs, running them on a low throttle setting always seems to make them richen up, they are a 2 stroke they like to be revved!