DAYUAN Motorcycle Vacuum Carburetor Synchronizer Tool Kit Carb Sync Gauge

Ok but not great

Went into this reading the reviews and assuming like many things that with a bit of care it would probably be alright. Carefully Loctited in metering jets, gently adjusted gauges so they were synced, then tried to use it on my good running 2014 FJR1300 motorcycle to dial in the throttle bodies as part of a normal service. Nope, it is complete and utter junk. Needles nowhere near each other and bouncing all over. Even when you switch the lines the needles don't change general area but remain wildly uncalibrated. . This thing is total garbage and sadly I didn't get a chance to test it until after the return window closed, so I am out the cost of this useless paper weight. Might be ok for some sort of steampunk cosplay, definitely of no use at all for any mechanical purpose.

Works as it should, only needed two gauges due to having two carbs. Unfortunately one of them did not work the greatest but was able to get the job done.

This is an absolutely smoking deal for what you get. You get a set of gauges attached to nice aluminum backplate, four vacuum hoses, vacuum restrictors to place inline and a case to keep them all. The gauges should be centered and zero'd before use which you can do via a flathead in the gauge face. They've traveled a long way, so reset them. You should also check the tension of the restrictiors at the base of the hose inlet at the bottom of the gauges, they're shaped like pilot jets. If you do all of these things, these gauges work fine and you can sync you carbs. For the people that didn't follow these steps, you will get all of the negative reviews.

Excelente

Good for the money.

I purchased these to tune my ‘82, quad carb Suzuki. One of the gauges does not respond like the other three. It’s close, but what I have to do is attempt a sync with the first three, then move the hoses to a good gauge and match the remaining carb. They kinda function, but not like intended. The cut off screw valves are really cheesy plastic bits. Hoses and brass tubes are nice. Case is good. All in all, save a few more bucks and get a higher quality set.

Two gauges works well, did not connected other two. Threaded tubes fits perfectly to my 2003 honda shadow sabre vt1100c2.

excellent

I am not that impressed with these gauges, one of the needles is stuck at it last reading, the snubbers are rubbish and fall apart easily. save your time and money dont buy these.

For an inexpensive gauge set they worked well - I had no problems calibrating them. Delivery was on day promised.

Used this to sync the throttle bodies on my yamaha, didn't need the brass attachments the hose just connected straight to the nipple by the throttle bodies. One of the gauges wasn't zero'd completely so I didn't need that one.