Some of you might remember helping me a couple months after I bought my first harley in May of 2008, you helped me through doing some of my first work. V+H SS slipons; stage-1 air flow and rejetting the carb myself. Anyway I had to get 2 new tires the other day, the front because it was worn with very little tread, and the rear because the tire with only 600 miles on it had a brand new roofing nail in it. The dealers tech said I needed a rejet of my carb. He said I may need to go 1-up on the main, some other things as well (non-technical and from what I can remember) shim something, maybe drill something or do something with the needle. My novice ears apparently was not able to hear whatever he was hearing. To recap, I rejetted from the stock, 175 main / 42 pilot to a 170/45. Personally I may notice it pop, once every 2 weeks. Going 1 up on the main is going back to the 175? or 165? They suggest as well $50 to put it under the dyno to get exactly what needs to be done. Based on the info I have provided, could it be running lean? and could another rejet fix this rather than doing all that "other" stuff?