Not sure on the gearing for the 80 class (I run a 50cc). But, I'm thinking to add 1 tooth to the front sprocket from the last race at Stockton... which would be about the same as taking off 2 or 3 teeth on the rear sprocket... I'll see how it goes during testing on saturday and go from there. I would post a thread asking what gearing combo people usually run for Buttonwillow (full straight) in the 80 class for an adult on the SMRRC site and SCMINI (probably get more response on SCMINI). I'm sure a few people will give you a good idea.