SOHC.co.uk Forums > CB750

carb settings on usa bike ?

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mancman:
many thanks guys.it sounds like as the clip on my needle is already set 1 groove lower than bitsas {thus it will be sitting higher and allowing a slightly richer mixture} i will leave it at that for now as suggested.  i had to dismantle the carbs, due to the throttle bar that they are connected to was seized in its bushes ! so i am going to have to set them up from scratch when i reasemble .  any advice or tips on getting a bench setting to start off with would be greatly appreaciated .     regards garry

Waggles:
For my F1 build I had to cobble together a set of carbs due to various problems with the originals. All I did was to ensure that all carbs slides were fully home when the throttle was shut ( measured the slide cutaway showing ) and that they all opened at the same time. That was enought to get it running ( roughly ) when I connected the balancer I found only 2 carbs registered!! so fair bit of tweekage then occurred! but it goes to show you can usually get it started even with the carbs a fair way out!

The more enterprising aongst us have attempted balancing using a vacuum cleaner! ( see thread 'Carb balancing - on the bench' ) up to you if you want to go that far but as long as the motor is timed OK and valve clearances set it should start.

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