Beta's Two-Stroke Oil Injection Explained |

Beta’s Two-Stroke Oil Injection Explained

When Beta announced the introduction of oil injection to their 2016 two strokes it raised a few eyebrows and plenty of questions. Mostly what is it and why do we need it? Cornering Beta’s Head of R&D Stefano Fantigini at their 2016 enduro launch, went in search of answers…

Why have Beta decided to use an oil injection system on their two strokes?

Stefano Fantigini: “A major limitation when riding a two-stroke is that you have to carry oil everywhere (on longer rides) and then mix it when you stop to refuel. Our main goal was to make it easier for our customers to use our bikes, especially when they’re out doing a long day’s enduro riding. It’s a system we’ve already tried in our 2015 Xtrainer and everyone loves it. The system also reduces the consumption of oil and consequently the total cost of usage. So it’s saving you money too. Added to that it has a positive impact to the environment, which will help us a lot in the future with Euro 4 or Euro 5 homologation rules.”

Correct oil mixture is crucial for a two-stroke engine. What have Beta done to guarantee the system’s reliability?

“The system has been extensively tested in various conditions and is currently being used in the Xtrainer without any problems. Most importantly, to reduce any chances of a problem we’ve installed an extra system failure light on the dashboard. If at any point this light turns on you can immediately go back to mixing oil in the fuel tank.”

So does this mean it’s possible to bypass the system?

“Yes, it’s possible to disconnect the system by simply taking the connector out of the pump and closing the oil injector. This will allow you to begin mixing your oil and fuel in the traditional way. Removing the pump along with the plastic tank can also offer a weight saving of 500g. Doing this will cause the failure light to turn on but it’s possible to disconnect that too. But we’re confident that once you begin using this system you won’t want to revert back to mixing fuel again.”

What if you want to tune your two-stroke engine, how will that affect the system?

“We tested the bikes in a wide variety of conditions and the fuel consumption data we collected helped us to create a map for the oil injector system. Of course any dramatic change in the engine’s fuel consumption may seriously alter the fuel/oil mixture and obviously affect our system. But we’re pretty sure both our RR 250 and RR 300 engines are tuned for high performance in their stock form so there aren’t many people who will want to make serious modifications to them. The system will function properly within a range of normal and suggested carburettor settings. If in the future we develop some aftermarket parts for our two strokes, then we might consider offering a different map for the oil injector.”

Not all two-stroke oils are the same, is the system adjustable by any means?

“Our system will work properly with any kind of good quality fully synthetic two-stroke oil that is currently on the market. It’d be possible for it to be adjusted, even if it had to collaborate with a highly-tuned engine, but this can only be done by us in the factory. For something like that, we’d need to have the whole engine there to try it on our dyno. We’d have to measure its fuel consumption and then adjust the oil pump.”

So finally one question that a lot of people are asking – is this a way for Beta to get around fuel injected two strokes or a step towards it?

“An oil injection is a completely different system from a fuel injection. Our main goal with the oil injector was to make our customer’s lives easier and our bikes more user friendly. That’s really why we developed it. But if we want to go on with designing an EFI system for our two strokes then the oil injector could definitely be of some help. We know that in the future we’ll have to go in the direction of fuel injection but the market isn’t ready for that yet.”