Floor Vacuum Gauges To Adjust Carburetors On A Motorcycle

I need to take the tops off the carbs and manually sync em i did do a bench sync but i need to fine tune it.

Floor vacuum gauges to adjust carburetors on a motorcycle.

I did do a starter fluid vacuum leak check and it seems to be in good shape. The vacuum gauge method generally how it s done in a motorcycle shop and the ball bearing method. If one or more of the columns rises to a lower level than the others a vacuum leak or some other problem will need to be identified and corrected for your bike to run its best. Popular methods include a tiny pump of some sort built into the carburetor and for the cv carburetors the slide cannot move up due to lack of vacuum on the diaphragm at that moment.

The carb boots are in excellent shape they were brand new 10 years ago. The vacuum decrease may be such that the mixture leans considerably and the engine stumbles so other features in the carburetor are needed to compensate. Set includes 4 synchronizer gauges 1 2 with fixed plates vacuums and 4 rubber pipes 8mm x 5mm x 750mm. Use the abn carburetor synchronizer and adjustment tool kit vacuum gauge set gs kz 550 650 750 to synchronize the values of 4 carburetors as well adjust them at the same time synchronizer gauges.

There are a couple of methods you can use. Turn the idle adjustment screw s out all the way and then turn it them in until the engine begins to stumble and back off a quarter turn. Reference to a shop a manual will list the correct rpm to set the idle to when vacuum balancing typically around 1800 rpm. When i was a kid my father and bj taught me how to adjust a new or rebuilt carburetor by watching and listening to the engine.

In setting the carburetor idle point with vacuum gauge best results are obtained by first jacking up the rear wheels one inch from the floor starting the engine and putting the transmission into high gear then adjusting the throttle stop screw until speedometer indicates 7 miles per hour minimum. Carefully remove the carb tool and reposition all vacuum hoses and plugs. P1 tools motorcycle vacuum carburetor synchronizer synchronization vacuum carburetor tuning synchronizer carb for honda yamaha kawasaki suzuki vacuum gauge set gs kz 550 650 750 4 5 out of 5 stars 81 58 99 58. So you want to synchronize the carbs on your multi carbed motorcycle.

Finally adjust the engine s idle speed back to the factory specs if it changed. I do think though that the cams are out of time. A vacuum gauge is irreplaceable when tuning a carburetor.