How to balance & sync your carbs in five minutes | Honda CBR600 | Carbtune 

It's better to sync it at cruise RPM (3000 or so) not at idle as that's where you are driving at it the most. It may result in a lumpy idle from throttles that aren't perfectly matched, and may look and soudn way out of a sync at idle, but it'll have a MUCH SMOOTHER cruise where it counts, vs a smooth idle and a surging or rhythmically popping cruise.. Former motorcycle mechanic for 15+ years....

Most important check before all the hard work, hook all 4 inputs together to check the carbtune measures the same on all four scales from one source.

Tuning and Synchronization are not the same thing. Tuning is setting idle mixture/float height/(maybe re-jetting) to adjust the carbs to meet the fuel needs of a modified or stock vehicle to be started and running without hesitation in the application of throttle. Synchronizing cannot make the vehicle run, but is done on a running vehicle using a reading from vacuum at the engine intakes to determine if each throttle plate or slide is at the same adjustment so that the equal airflow is achieved, which helps with idle smoothness and throttle range smoothness of a properly tuned system. If an engine is idling at e.g. 1000RPM, whether it's running lean or rich according to the fuel adjustments, the cylinder still has a fixed volume of air displacement at each stroke as constant as the RPM remains relatively constant creating vacuum. Even if you Synchronized the carbs on a special make-believe vacuum bench that is exactly like the condition of a running constant motor, you would still have to Tune the fuel screws for those carbs to start a vehicle and run correctly. Is this getting through?

Mercury🤣 really?

You mixed up the 1&2 and 3&4 when you went screwdriver on... needs an audio edit.

first screw was 3&4 . engine cylinders go 1 2 3 4 from left to right

My bike doesn't have tubes that go to the airbox because it isn't the California version. So how do I do this??? I cant figure it out

Always use a blowing fan in front of the engine.

Can this be done on Honda Hornet 600? As I've been told u need to remove carbs completely? Please answer if u can thanks

It's not mercury, these are metal rods

Best vid on carb syncing

Great video. I'm just getting into riding and I had no idea the intricacy involved with proper carb performance.

Hello, I borrowed some of your video for editing my own video here :

Very high quality video (thanks for the HD), and that bike is CLEAN!

Thanks, you have the best instructional video on carb balancing.

Very well put together, thank you for getting straight to the point.

I have the same year, 2000 cbr 600 f4 and need to clean carbs and tune. This video is very helpful, but would love some more guidance, if possible. I want to do it right. I love my bike and want to make sure she is treated with care.

Yes very good and well explained video. I’ll have a go at my zephyr now. Fingers crossed 🤞

I sync. Tune and sync again. Seem to get good results

awesome high quality detailed video thanks alot! really me out on my 2000 cbr 600 f4