SOURCE: 2005 yamaha yzf 250-unstable idle
I had the same problem, Turns out that my shims were finished, replace the chims and check clearences.
SOURCE: bike bogs for second then revs when throttling
Pull the slide out of the carb then remove the jet needle and move the clip one notch lower on the needle.
SOURCE: I need tuning specs for my 1982 suzuki gs 750.
You need to fix the fueling first - without fuel it won't run!
Your other problem sounds like an air leak - either the manifold or the carb. Check by spraying WD-40 or CRC at the manifold and carb join while the bike is running - if the revs change (either up or down) you have a leak.
SOURCE: 1981 gl1100 has 4 keihin carbs bike sat 7 years
When removing the pilot jet screw, count the number of turns to remove. Put the screw back the same number of turns then unscrew 1/4 turn.
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After thinking about it amd doing some research... we took the carb back off and rejetted the bike again... This time we ignored the oem specs and took into account our elevation, changed out the spark plugs, found a bad boot replaced it, found a vacume line that was leaking...Voila, the bike is up and running like a top. While some people scream "take it to a professional." I say "know how to work on your bike, all of it. It's better then being broke down and ignorant of how to fix it". Don't be afraid to ask questions to expand your knowledge. Thank you for everyone for the advise.
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