I had to clean the carbs on the 250 I have as it sat for 6 months or so, they are one of the more difficult motorcycles to get the carbs out of. I removed the air box screws and also pulled all the motor mount bolts except the bottom rear one, this allowed the motor to pivot ahead and gave me a ton of room, I would guess it only adds about 10 minutes of work. You may have to loosen or remove the back wheel to give the chain enough slack.
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