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does it have dual carbs or just one carb
does the right cylinder have spark
i would run a compression test on the right cylinder i think you have a exhaust valve getting stuck open a bit thats why its popping. The compressed fuel and air is leaking passed the valve and burning in the exhaust thats why its glowing red and the left side is running fine i would look in to that
well if you have spark and fuel then i would do a compression test that would tell us a lot about whats going on with the engine
ok let me know what you find
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