All solutions which I have used in the past now seem to have lost some of their potency. Even the expensive industrial carb cleaners don't work all that well anymore. I have found, through other forums however that Pine-Sol works. It does work fairly good. It needs to be the original formula, and needs to be full strength. Don't use it in the house. It stinks!!!!! On really dirty carbs you will probably need 2 days worth of soaking. Do not soak rubber parts in the Pine-Sol, as it will soften, and make them expand. A good cleaning, and inexpensive rebuild kit from Sirius will have your carbs working like new again.
I recently had a '76 Yamaha XS650 here. The bike had never ran right, and had been to a few mechanics who had all cleaned the carbs. The bike would run OK, and then back to running crappy according to the owner. Well, I cleaned the carbs, inspected everything by eye, got the bike running again, set the carbs, and it ran pretty good. Took it for a good long ride, and thought that I had 'er fixed. I left the fuel taps on, for a day, and noticed some seeping coming from the overflows. Not dripping, just some wetness. I pulled the carbs apart, and tested the needles and seats once again with the blow test. They were fine. I pullet the jet needles out, and thin time inspected them in bright sunlight with a strong magnifying lens. I noticed porosity. I went to Sirius, and got the kits from Chris. Installed them, and man did that bike wake up!!! It ran like brand new! It even ran noticebly smoother, as the first time I rode it, it vibrated quite a bit. This time it was smooth. I took it for a good 40 mile test ride through all types of situations. Hwy, countryside, and city. Bike worked flawlessly. People in town even commented on how nice this old bike ran. The owner was going to sell her bike, as it always gave her trouble. She is now keeping it, and loves how the bike has been running.
The choice is yours, follow my knowledgeable advice, and get your bike running great, or follow the directions on a spray can and maybe get your bike running OK. I do this shit for a living, not just after supper.