all of thats true. i know with my 350, with free flowing pipes, and no airfilers, i upjetted one size on both jets, and it seems to run rich. but its better that way on the race bike since its wide open alot. you can buy carb baths from auto parts stores for about 25bucks. a gallon with a dip basket. 20 mins in one of those will clean em real good. be sure to pull all of the plastic and rubber out of them. that shit works great though. i dont remember if they use cv carbs or not. grab a rebuild kit, make sure the needles arent too worn, run the idle and air screws in all of the way, COUNTING how many times IN, and be sure to back them out the same when you put them back together.
if youre running stock caarbs run 68's and 110's or 105's. ive seen them come with both. if youre running mikunis on a stock motor i dont know where to point you but sudco will know. there is a guide for tuning, but ive never had the patience and or time to figure it out. although aaron probably knows the book inside and out.
smoke is a new one on me. is it just chuffing smoke?? or is it like a backfire through the carb? thats weird.
its usually called carb cleaner or parts cleaner. its usually sold in a gallon can. so you cant miss it.
if youre new to engine stuff, a small engine class certainly wont hurt. it'll teach you tha basics and also how to methodically trouble shoot problems. one thing ive noticed about when people are new at this is they dont know where to start looking for problems. ive seen guys chase problems all over, and not looking in the most obvious places first. so you'll learn where to start, and what to look for.
as for the carb cleaner, its some kind of a super toxic bath. it will eat anything thats not metal, and it even seems to eat that to an extent. it will make your carbs look brand new. if you leave any plastic at all in it, it'll kill it. when you go to reassemble them, use the rebuild kits.
there is also a book i recommend alot on these. its called motorcycle fundamentals, service and repair. its a text book. its by edmundson and johns. its a really good book. everyone should have it. its expensive, but good. i use it all of the time.
oh yeah, the exposed foam elements can suck water up if you dont oil them. that restricts airflow and can lead to no runny motor. then, they also attract dust because of the oil you have to put on them.
it doesnt sound like idle screws. you should really be idling at about 1200rpm. make sure there or no air/gas leaks. ive seen other bikes do that but its always been kind of unexplained. make sure the intakes are well sealed though. also make sure theres no shit in the bowls that would cause it to starve on one side. it could also be an ignition problem. like one side drops off, then picks up. check for lose plug wires.
just a guess from here though
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