afr meter/great way to spend $300
i have always built and tuned my own motors in my toys and always thought i was ok at doing it. when i got my 39mm fcr downdraft carbs on i thought i had them jetted very close, they seemed to work great, started excellent, no hesitation at all and the plugs always looked good. finally broke down and bought one of these afr meters just to check myself. turns out i was 4 jet sizes too rich on the mains, the needle was 2 clips on the lean side, the pilot was 1 size too rich and i was a turn off on the fuel screws. my afr readings are near perfect now and my teryx runs much better than it did before. if you like to tune your own engines and want to know your doing it well, get one of these its well worth the $300. this one i got also records data including rpms you can download it to your computer to view later.
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