george 1100 Posted June 23, 2022 Share Posted June 23, 2022 Found this pic that shows the chamber around the plug dished down a fair way which can be achieved in the piston top also but I guess if it's present on both and the squish is tight, there may be some benefit. Anyone seen or tried this before? Quote Link to comment
Gixer1460 Posted June 23, 2022 Share Posted June 23, 2022 Raises more questions! Requires short reach plugs? If not, then exposed plug threads carbon up and muller the head threads coming out! Lowers compression! And 'kernel' type combustion chambers never seem to help overall combustion from what i've read. Maybe they were just grinding / polishing out some cracks LOL! Quote Link to comment
george 1100 Posted June 23, 2022 Author Share Posted June 23, 2022 Yes, it looks like it would create problems rather than be of any benefit Quote Link to comment
cnap504 Posted June 23, 2022 Share Posted June 23, 2022 Twin anti swirl combustion chambers. I dunno Quote Link to comment
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