2-Channel - The Digi Sync™ Digital Throttle Body & Carb Sync Tool, Easy to Use & Accurate Carburetor Synchronizer, Vacuum Gauge Carburetor, Peaking Manometer, for Carbureted & Fuel-Injected Engines

I don’t write reviews often so when I do it’s because I truly believe in an innovative product. The digi sync makes synchronizing carburetors so easy and as a bonus it can read the vacuum pulses and tell you accurately your RPM’s to set the proper idle on your bike (especially useful if you are running a stripped down track bike without gauges). Just hook the hoses up to your vacuum ports on your carbs and turn your adjuster screw until the numbers match. It’s that easy! It also comes in a nice carry case so I take it with me to the track and help others check their carbs.I synched the carbs on my gen 1 sv650 in about 5 mins. To keep the fuel petcock open (it plugs into rear cylinder vacuum ports) I used my mitivac brake bleeding pump and gave it a squeeze to keep the petcock open while running the bike. It runs so much smoother and pulls so much harder having both cylinders synched. I highly recommend anyone considering this tool to just buy it. If you have anything with multiple carbs this is for sure the tool to have. I bought the 2 channel but have no doubt the 4 channel would work great on the bigger bikes.

Really is worth the extra money, i have seen other $50 carb syncs but the ease of use and light up display makes working poorly lit garages more enjoyable. Also more precise by far than gauges. Comes with case and fittings of different sizes and extra caps for replacing your old ones ❤️.

I bought a 97 Honda Valkyrie last year and while it's ran great, there's always been a small miss and a scent of gas that's stronger than I felt it should have been.Learned about how a carb could be out of "sync" and that one or more of the cylinders could be running lean.Did some research and everything I'm seeing about the process is, for me, nightmare fuel. Gauges that need calibration and tubes of liquid?Called 2 local Honda dealers to me and asked if they could sync the carbs. One of them only had a setup for 4 cylinders and the other was so wildly doom and gloom about the entire process and made it sound wildly expensive.Found out about the Digisync through a Valkyrie forum. Reviews were high and I did as much research as I could online and youtube on the step by step process for syncing as there were some videos, but they kind of brushed over some details I didn't understand and another videos was incredibly detailed and educational, but was for bench syncing.My Clymer's manual was zero help as well.Ultimately, what I learned was that all the carbs run off of one main/consistent carb. Which is the carb that you can adjust the idle on.So, hook up the machine, use the idle knob to set RPM where they should be, then match the other carbs to that one using the adjustment screws.This machine made that process shockingly simple. Once you figure out which tubes need to be pulled AND which carb is taking in the gas from the tank (and needs to be done last), it really was just a process of unhooking and rehooking lines.I was stunned to find that the tach on my bike was wrong. I'd set it to roughly 900 rpm according to the tach. Well, the Digisync showed me that I was over 1000 rpms.I dialed the rpms down to about 940 and was stunned to see that the 4 other carbs were almost perfectly in sync. I was actually disappointed.Then I disconnected the gas line from the last carb, hooked up the last hose from the digisync and started it again.BAM! My problem carb! I had to work quick as the bike is running only on the gas left in the carbs, but I was able to adjust that carb and get it to match the others.Turned off the bike, unplugged the Digisync hoses and plugged everything back in.The small miss on my bike is now gone and the smell of gas is reduced by a not insignificant amount.I'm wildly pleased with this product and will sing its praises to anyone with carb motors!!!!Thanks for an amazing product (that even included the 9V battery!) at a fraction of the price I'd have to have forked over to a shop that probably had no chance of being as accurate as the Digisync!

This worked really well. 1st time user of an item like this and it was simple. Helped me locate a spring that wasn't in the correct position on one carb.

Works alright, but readings can jump around while monitoring (ESPECIALLY RPMs). That must be normal, though, for it ends up being fine in the end.Why did you pick this product vs others?:Reviews seemed quite favorable.

If you want the best possible carb synchronization this is it . I tried those 4 round gauges and they will get it roughly synchronized. Then I bought a carb tune and that was better but not as good as this product. So I purchased this digital carb synchronizer and it will get the carbs more in synch than anything else will. I think seeing digital numbers next to each other helps as well because the analog gauges can show different readings depending on the angle you view them where this is a number that isn't affected by what angle you view them. For the heck of it I switched the hoses all around to prove these are accurate and calibrated to a high degree. This product senses the peak vacuum signal instead of an average signal through a restrictor like the others and that makes it more accurate as well. It's worth it for sure.

Product arrived early. Very easy to use. I like the fact that they give you extra caps. After sitting 24 years and getting the carbs cleaned, I was able to get the bike (2001 Yamaha FZ1) started. Within minutes I could tell it was idling better. Still have work to do to get it fully back to safe riding condition but this was a major achievement! Highly recommended!