New to Predator 212cc open kart 375lb Gearing question

racing promotor said:
Do the tires have and numbers written on them with silver or good marker right around the bead ? example 061910000 which would mean they were rolled June of 2019 with 100 cc, If 400 or more low then start where Tyler told you 18/64 and If rpm are close early drop 1 off rear for the race.
Heads up NEVER buy used tires without know IF Internal, how much Internal and When rolled.
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I will look when I get home if there is any writing on there. I will hook up a better Tach tonight I was told to run one of those small cheap ones from amazon
 
alvin l nunley said:
I couldn't find where you mentioned the RPM you were turning, maybe you don't have a tack. This gives you some idea of the MPH you were turning with the numbers you gave for gearing. I just picked 5800 out of the air.
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We have a cheap Tach from amazon I will try to hook up the Tach I have for my S.R. champ kart I know her heat race last Saturday one of her laps was a 13.99 Around Hunterstown Speedway
 
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