Motorcycle Fuel Vacuum Carburetor Synchronizer carb sync Gauge Fit Honda Yamaha

It works as it should, no complaints from me!

Works good for price. Be careful I screwed 2 of the long brass adapters in and they broke off in motorcycle.

Everything works perfectly but when I got them two of the glass gage covers where broken. I'm sure it happened in shiping. I would like replacement lenses but don't expect to get them. I would have given them 5 stars if not for that.

Works great for synchronizing my carburetors. Much much easier than the old liquid-filled YouTube.

Biggest complaint is that you cannot remove the gauge faces to get to the calibrating screws. The error varies as well, so be prepared to deal with that. I hooked them all up to a vacuum pump, chose one gauge as the reference then wrote down the error for each of the other 3 gauges at each of 5, 10, 15, & 20 in on the vac side (was synching carbs, so didn't need to worry about pressure accuracy.) Since they inconsistent from the start, before I "calibrated" I also ran them up to almost max readings on both vac and pressure just for a little break in action. The valves to dampen the needle bounce are also pretty crummy, but can be fiddled with enough to get them to work. They function so poorly that just removing your finger after adjusting can throw them out so the needle freezes or bounces like mad, but with patience you can get the needles stabilized. I ultimately chose this kit because I wanted it soonest and it came with the widest variety of fittings. I used it on a Honda BF90A outboard. I feel confident with the outcome. I would recommend something much better if you need accurate vacuum readings. I have a trustworthy single gauge that I use for different procedures where the actual value matters and not just a comparative one like for balancing. On the positive side, it arrived on time, undamaged and complete. I will be using it again on another 4cyl boat motor, soon. I plan to recheck calibration, but that only takes a few minutes. Oh, and the worst deviation was 1.5in. on one of the gauges at the 20in. mark. Mostly, they were plus or minus 0.5. I also could have made my "reference" gauge one of the two that read the same, but that would have put them in a goofy order for my synching - just food for thought.

Easy to connect, zero in the gauges, very readable even with my bad eyes. These are especially nice since they don’t have those white plastic fittings you need to install; these have the brass fittings built in

valves are unable to be adjusted so that it let's pressure through and keep the needle in a steady position at the same time. my carbs were less synced than when I started using this tool

If you have a multi carb system these work well for the sit, not for everyday shop use. Good value.

Decent for matching. However the numbers are not accurate. But they are all wrong by the same amount

Ottimo

Good enough for the price.Easy to use it durable case

Gute Funktion, nur leider keine T-Stücke zum Uhren abgleichen dabei.

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