I noticed it gives off a lot less smoke than with the old carb and the exhaust is dry. The latter sounds more like it, the hesitation. Here's another in which you can see the is level way too low. If the float is plastic, it requires heat to bend it, and this should only be done by someone whom is very experienced, otherwise you might end up with a puddle of melted plastic which will no longer fit very well. If if is above the dotted line, I would definitely fix it by bending the small metal tab slightly that depresses the needle, slightly upward toward the top of the carb. If it is at the dotted line, it will still not cause a problem even though it is just a little high. It should be just below the solid black line in your case. Here's an example of it a little too high. If it is excessively high, it can cause a rich or flooding condition. Yellow gas is either oil or contaminated by rust in the tank or both.Ĭheck the float level. If the gas is old or yellow at all, change it. In the case of a plug that has extremely heavy deposits like this, I would go down 3 sizes on the main because just one will not be nearly enough and two will likely no be enough. If both the threads and the porcelain is black, i would start by reducing the main jet size first. This plug is bone dry so the black means it is rice. These photos will show what John was explaining. It is possibly rich too but its hard to tell because of black deposits from the oil. The plug on the right is shiny which means it is wet which means its oily. If it simply hesitates as if it is out of gas, it is lean. If it stutters/burbles even the tiniest bit when you accelerate, it is rich somewhere. Just worry about how it runs while you are actually riding it. Ok, forget about what it does when you stab the throttle in neutral for now.
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