So i got me this old in bad shape 1985 honda rebel 250. You should it seen the carb, filled with grease and dirt in the outside, i could just imagine on the inside. So i took it to a mechanic and the moron only cleaned on the outside and charged me like he did the job. How did i knew that? i inspected the screws and the where still dirty as no screwdriver was inserted in them. Plus gas was comming out red from the mud that the carb had inside. Anyway. I was having problems with my bike, unresponsive, shaky, and so on, so yesterday i opened the carb following the tutorials.So freking easy that i cant believe that moron didnt do the job.I had a hard time with the main screws, but once i loosed them the rest was easy. Cleaned the carb as per instruction per my deceased dad in the past, with tons of dish soap and hot water, then gasoline, then soap and hot water again , now all clean. So i put the whole thing together and still had some problems.I went today with a different mechanic who found that my Choke, didn't had a spring inside to keep it in place So it was injecting way to mach gas.(im building a bobber so i removed the choke cable and place the metal part inside without the spring to keep it in place). He added a spring to it, and voala, bike its back to riding. So anyway i got 2 questions. If the jets inside the carb are well snugged, and the main air jet its at 2 1/4 -2 3/4, thats all the carb needs in order to function well? (of course besides the choke). I know theres a black knob on the outside to make it faster o slower at iddle. So between those 2 its all? Any bobber users here? How many turns would you recommend for the main air jet if im not using the stock air filter, but one in the engine and one in the carb... thanks for any help, and advises or talks.