Motorcycle Vacuum Carburetor Synchronizer Carb Sync Gauge Kit 4 Cylinder Compatible with BMW Honda Yamaha Kawasaki Suzuki GS KZ XS CB 550 650 750, Carb Balancer Synchronization Gauge Tool Set

Very good quality product works great I just love it

Well-made, complete set of carb synch gauges. Seems to have just about any hardware hook up fitting needed to synchronize 4 carbs on just about any motorcycle. When tested, using a hand pump (pressure and vacuum) at room temperature, all gauges appeared to be working properly and accurately calibrated. There are hose clamps, to make sure that the connection to your carbs and fittings is airtight, but I really don’t see where they are needed. This set replaces an older name brand carb synch set (much higher priced), where one of the gauges never worked properly. Previously, only having three working gauges was ok as I only needed to synch two carbs at a time on a couple of twin cylinder bikes. But using my old set to synchronize 4 carbs at one time wasn’t possible. I also like the large easy to read dials on these gauges, which are much larger than my old set. This set comes with a sturdy hard case which will help prevent it from being destroyed in my well-packed garage.

My review of the DHA Motorcycle Vacuum Carburetor Synchronizer Carb Sync Gauge 4 Cylinder Compatible with BMW Honda Yamaha Kawasaki Suzuki GS KZ XS CB 550 650 750, Carb Balancer Synchronization Gauge Tool Set.First of all this is a very nice setup. This kit comes with several adapters and hoses that make it compatible with a wide variety of motorcycle engines. The gauges seem well made and the adapters are solid. To use this kit you have to be able to "zero out" the gauges. Normally this would mean removing a small plastic plug on the face of each gauge and turning the small flat head screw. The problem is the adjustment screws for the individual gauges. On my kit 3 of the 4 adjustment screws were stuck and would not move. Without the ability to zero out the gauges they are useless. The hole in the gauge face is too small to get a large screwdriver in and a small screwdriver doesn't have enough torque to move the screw. Compound this with the screws themselves. They are made of soft metal and one was beginning to deform due to the force I was using. To remedy this I was able to remove the plastic faces of the gauges and use a number 2 flat head screwdriver and free up the adjustment screws. If you look closely at the face of the gauge you will see a small notch at the top. Rotate the notch down to an indent in the gauge body at the bottom. Then you can pry the gauge face out of the housing. Once the face is removed you can use a larger screwdriver to free up the adjustment screw. Then replace the face and perform the adjustment with a small screwdriver to zero out each gauge. See my pictures for the location of the notch on the face. Also I have a picture of the plastic plug that can be removed to access the adjustment screw. Once you free up the screws and have the ability to adjust the gauges to zero you will have a very nice set of synchronization gauges.

The gauges do not zero out well and there is no provision to zero them. In use the needles arc over a range of 90 degrees so you really can't balance any carbs or injectors.

If you ride an older bike like I do, The carbs sometimes just need a good syncing. This is a great tool to have around for that. Super easy to use. And they seem to be fairly accurate. Love the case they came in. And it came with all the hoses and attachments I needed for my bike. Very happy

I don't have much faith in these. The outer box was in fine shape, but the plastic storage box is full of white stress marks because it was forced together out of alignment and sealed the wrong way. One of the 4 gauges does not rest at the same point in the scale as the others when open to atmosphere. When tested against a hand vacuum pump, one pump registers lower on that one gauge than all the other 3 which are equal. Even the photo on the included instruction sheet shows one gauge out of sync with the other 3 leading me to believe this is a systematic problem with manufacturing.

Have a couple of different motorcycles and this will be be very nice when I do some fine tuning. Balanced carbs make a motorcycle run smoother and better.

A must have to sync carbs. I have used this to sync dual, triple and quad carb bikes and it works perfectly every time. Kit comes with just about every kind of adaptor needed in order to get the tool to work properly. I decided to go analog over digital carb sync since its tried and true for decades.