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OSSA Pluma/Plonker IRZ jet sizes


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I recently acquired a Pluma/Plonker that came from a high elevation.  I live at about 1,000 ft. elevation above sea level and the bike runs too lean.  The bike has a 24mm IRZ carb and I want to keep this carb on the bike.  I know finding IRZ jets isn't very easy and I want to limit the number of jets I purchase.  Does anyone know what jet sizes and needle clip position this carb came with or should have for a lower elevation?  Currently, the carb has a 45 pilot and a 101 main jet.  I could guess and get a 50 pilot and a 110 main, but like I said, would be nice to know more specifically without all the trial and error.   



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