Rotax Max Evo Pro Flow Jets

Why Every Driver Needs These Two Videos
December 12, 2016
2016 Rotax Grand Finals World Champions
October 2, 2017

Flow Tested Main Jets

Pro Flow jets are the most precisely calibrated jets available in today’s market. We test thousands of jets using a liquid flow bench engineered specifically for rotax jets. Each individual main jet is flow tested and the data we receive is recorded and logged into our software, where we select jets to create a linear relationship in flow from one jet size to the next. With a ProFlow jet kit, tuning your carburetor is easier than ever. If you ever lose or damage a jet, contact us with your serial number and we will replace your lost jet with one of equal performance.

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Pro Flow Q&A

1Why shouldn’t I pin measure my jets instead of purchasing ProFlow jets?
Pin measurement is a great way to determine the hole size of your jets, but performance of a jet is affected by many factors outside of hole size that cannot be measured by a pin set. The only way to accurately test the performance of a jet is to flow test it.
2What happens if I lose one of my jets?
If you lose a jet from your Pro Flow kit, don’t worry. Every kit we sell has a one of a kind serial number with your jet information. Contact us and we will replace your lost jet with one of the same performance.
3Will using ProFlow jets really make a difference?
Using ProFlow jets will save you valuable time at the track, and take the guesswork out of tuning. Tuning the carburetor is never easy, and we’ve worked hard to eliminate some of the difficulties that have troubled racers in the past.
4What makes ProFlow jets special?
Our jets are tested using a state of the art flow bench which records the rate of flow of each jet. After the data is collected, jets are selected which have a linear relationship from one size to the next. In other words, using ProFlow jets makes carburetor tuning more predictable and easier than ever.
5Should I do anything to protect my jets?
Yes. When not in use, keep your jets clean and sealed in their container. This will protect your jets from corrosion which will affect their performance. It is also important to use a proper screwdriver to prevent any gouging or other damage when working with your jets.

This was a project that Chris and I began discussing a few years ago, and it is something that I stand behind 100%. This video really explains everything there is to know about the jet kits and their benefits. Pro Flow Jets for the Rotax Max engines is the only way to accurately test jet sizes and not using pin gauges that most teams and engine builders currently use.

I have been driving Rotax since 2003, and up until now, I never knew what jet I was actually putting in my carburetor. Now look at the whole picture. If there are 50,000 Rotax engines being used, that means 50,000 people don’t really know if that 128 thats in their engine could be a 122, 0r a 130 main jet.

Dellorto mass produces the jets. They would be machined within a certain technical spec, which in industry standard is accurate. However that deviation is what causes problems when trying to maximize performance of the engine where jetting is so critical. Starting 2016 with the EVO engine. Jetting has become even more critical. The reason being is we are using even smaller jets. The smaller the jets the more precise. Take a look at this example.

Non Evo 2015 Junior/Senior
Running a 160 main. Switching to a 162. 2 points different. = 1.25% difference.
Evo 2016 Junior/Senior
Running a 120 main. Switching to a 122. 2 points different. = 1.66% difference.
Evo Micro
Running a 108 main. Switching to a 110. 3 points different. = 1.85% difference.

The jets we run now are almost 75% smaller in size. With that the percentage in size is increased. So before with none evo jetting was less critical.

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