TE/TC Spark plug indexing

Has anyone ever done this on a 2 stroke. I pulled the head off my 300 to mill it and noticed that the plug protrudes into the head by about 1/2 a thread. That got me looking at the electrode vs exhaust port relationship. I wonder if it would make any difference if it was aligned. Cam

Research tells me that the open part of the electrode gap should face the exhaust port. I will try that. Mostly done by shiftercart racers. Cam.

Put helium in your tires to give it less unsprung weight also

Yea there may be something to the theory but unless you tune your bike so finely you need data logging on egt every time you ride it then you should prolly just settle down

When I modded the head on my new 2018 150, I re-installed the chamber insert so that the open end of the gap was toward the intake (guessing that the transfers "shoot" toward the center from the sides). Felt like a stock motor with a good head mod, to me. But it's certainly not gonna hurt. I think indexing is more of an issue on high end 4 strokes and race car engines, when valve location affects cylinder filling and charge density at different locations within the chamber.

I was reading some outboard motor info and often the fi motors runability issues were solved by a service bulletin to index the plugs so the bent part was facing the injector. Not our bikes but got me thinking. Too cold to ride. Cam