Very happy with my purchase, its very easy to use and accurate when minor adjustments are made.
Highly recommend this business for high tech tooling.

My air fuel ratio metre arrived well packed and quickly. I would happily order fromRayTechAutomotive again.

turned up quickly and works great

Good quality. Love that they come with a few different sizes for my different bikes.

Great piece of gear

LambdaKing Mk II - Air Fuel Ratio Tuning Meter

Arrived today, securely packaged. Straight out of the box it worked flawlessly and made throttle body synchronising on BMW R1100S a breeze. I didn't even worry about fiddling with the sensitivity. Only thing to be aware of (not a complaint or fault). The vacuum nipples on the BMW throttle bodies are smaller than the internal diameter of the supplied vacuum hoses. Nothing that a cable tie didn't fix. Money well spent.

I should have bought one years ago. Excellent quality, works exactly as advertised.

Vacuum is one of the best ways to give you a true sync on your throttles.

My only note is be careful with the vacuum nips, they are very thin and will easily snap if you overtighten over the wrong angle during removal.

Superfast shipping at a fair price. Works perfectly as described, allowing me to synchronize and set the final idle mixture on my Ducati which has an early type fuel injection system that has air bleed screws controlling the mixture at low speeds. If not set precisely it will stall and run badly, but thanks to this device it's now running better than it ever has since it was new in 2003. (Just a heads up, you do need to replace the existing exhaust bungs with some the correct size for the wide band O2 sensor, requiring a 20mm hole saw and a welder. I was able to do it on the bike without removing the exhaust.) I highly recommend this product and seller.

I work on BMW airhead bikes, which all benefit from well-harmonized and balanced carbs. I've used EVERY carb balancer on the market and I have to say honestly that Raytech's product beats all of them, hands-down. The tunable damping is a nice feature. The ease of finding a good sweet spot for adjusting idle is perfect and I would not change a thing. The only thing that would be nice-to-have is probably an RPM read-out (good for adjusting the air-fuel mixture, but most do it by ear if they cannot see the tachometer). The equipment seems quite durable and I've already given it a bit of a beating.
The fact that I've been buying more and more Australian-made equipment these days begs the question: Why are Aussies making so much better **** than Americans? Raytech also managed to get me the box in 5 days flat, an amazing feat considering how much Trump is trying his best to mess up trade between the US and Australia.

Love this product works extremely well and is Australian made

SynchroKing - Carburetor & Throttle Body Balancer

Socket Driver for 8mm Port Adapters

The unit is very easy to set up however it may require reseting to get the actual real time data. This required me to take the clip off power and then reattach. When this is done, real data starts appearing. The unit confirmed my mixture **** setup and the main jet fuel increase (richer) when throttling. However, the sniff stick did not fit inside my small diameter exhaust - CB 550K and CB 250N. I will need to fabricate a pipe for both bikes. Overall, a great unit for adjusting and understanding A/F ratio.

Excellent tool. I have never balanced a set of carburetors so I am a complete novice at using a tool like this. I had totally stripped and rebuilt the carburetors on my 1980 Suzuki Gs1000gt so they where a long way out. It was easy to set up and the instructions are easy to follow. It took me no time to get them balanced once I figured out which way to turn the adjuster screws.