RaceDynamics aftermarket ECU for the Royal Enfield Classic UCE 500 EFI: All you need to know!

India is developing at a frenetic pace with millions of her people achieving economic prosperity and higher disposable incomes each passing year.  Even so, a car remains a luxury for many Indians while a motorcycle remains a primary mode of commuting. In such a scenario, it is easy to fathom why the Indian aftermarket tuning scene is still in its nascent stages as automobiles for the vast majority of India are mere appliances rather than machines with unique souls and different characters. However, motoring enthusiasts do exist in the country, although they are a minority.

Race Dynamics Logo

Race Dynamics Logo

One such motoring enthusiast is Pawan Kumar of Bangalore, who runs an Indian tuning firm called RaceDynamics, which makes standalone aftermarket electronic control units(ECU) for cars and motorcycles. RaceDynamics, which prides itself as a firm that develops ECUs that are designed and developed completely in India, has come up with its latest product yet, an aftermarket ECU for the Royal Enfield Classic UCE500 EFI. Before we delve into the finer aspects of the ECU, let’s look at why RaceDynamics came up with the ECU for the Classic 500 in the first place.

Royal Enfield Classic 500 UCE

Royal Enfield Classic 500 UCE

Introduced in 2009, the 500cc  Unit Construction Engined Classic 500 was not just a brand new motorcycle, but also a brand new line of thought for the iconic motorcycle maker Royal Enfield. The Classic 500’s UCE engine was the first true retro modern engine that Royal Enfield had developed in association with Engines Engineering(Now, a Mahindra group company) of Italy. The motor in itself is a robust unit which, keeping with the times was fuel injected. For the Indian market though, cost considerations meant that Royal Enfield deleted the O2 sensor to achieve a lower cost by eliminating the expensive dual catalytic converter required for the O2 sensor to perform optimally.

In many cases, it resulted in the Classic 500 being prone to jerking and running extremely rich mixtures as Royal Enfield engineers seemed to have preferred to, in classic engineering parlance, err on the safer side. This opened up the market for a aftermarket ECU that could perform better than the stock replacement unit, while also eliminating the various gremlins that the stock ECU brought along with it.

Lo and behold, the RaceDynamics Powertronic RS ECU for the Royal Enfield Classic UCE500EFI was born. Team ICB interviewed Pavan Kumar of RaceDynamics to understand more about the aftermarket ECU for the Classic 500. Please note that the below question and answers are not a verbatim transcript of the electronic interview we conducted with RaceDynamics’ Pavan Kumar. Instead, through thus QnA session, Team ICB has attempted to address all the queries of Royal Enfield Classic 500 owners about the RaceDynamics ECU, in an easy to understand format.

Racedynamics PowerTRONIC RS-RR Aftermarket ECU for the Royal Enfield Classic UCE 500 EFI

Racedynamics PowerTRONIC RS-RR Aftermarket ECU for the Royal Enfield Classic UCE 500 EFI

What will the RaceDynamics Powertronic RS ECU for the Royal Enfield Classic UCE500EFI do for you?

The prime purpose for which RaceDynamics built the aftermarket ECU for the Royal Enfield Classic 500 was to increase the riding pleasure of this retro modern motorcycle, by ironing out the glitches that the stock ECU came with. So, the aftermarket RaceDynamics ECU will ensure that your Classic 500 will not face jerking or missing at any point of the rev range.

Also, your Classic 500 will not run rich, like it has been on the stock ECU, which means that fouled plugs will be history now. Overall, the aftermarket RaceDynamics ECU will make your Classic 500 perform better than stock. The RaceDynamics ECU for the Classic 500 is very simple to install as it is a plug and play device that can be installed even by novices by following the instructions supplied with the ECU.

Now that Royal Enfield has come up with a remap for the stock ECU of the Classic 500 that is said to eliminate most of the ECUs shortcomings, where does this leave the RaceDynamics ECU?

The RaceDynamics ECU, like the stock ECU runs on a closed loop system. However, the stock ECU does not offer an option for the customer to bolt on an aftermarket exhaust like the Goldstar or the Megaphone. RaceDynamics’ ECU has a precoded map to recognize a free flow exhaust on the Classic 500, and will act by supplying more fuel to ensure that the motorcycle does not run lean.

Why is this important?

The Royal Enfield Classic uses an air cooled, single cylinder 500cc engine. This engine’s sheer size means that it needs plenty of air flow to operate at its optimum potential without the engine overheating. An overheating engine means accelerated engine damage and this is a potential consequence of running a goldstar or a free flow muffler, as these exhausts lean out the mixture. For those who know Royal Enfields, they will appreciate the fact that one of the most common modifications that a Royal Enfield is likely to make,  as the  soulful thump is everything, for most Bulleteers.

The RaceDynamics ECU which comes with a map that will recognize a free flow exhaust and adjust the air fuel mixture to the ideal stoichiometric ratio of 14.7 : 1, which will ensure that your Classic 500 will give you a small power bump when you install a free flow air filter even as the engine of your motorcycle runs on the perfect fuel mixture. So, in a sense the RaceDynamics ECU will increase performance when mated to a free flow exhaust and this is something that the stock ECU cannot do due to the limitations in its code mapping.

Racedynamics PowerTRONIC RS-RR Aftermarket ECU for the Royal Enfield Classic UCE 500 EFI

Racedynamics PowerTRONIC RS-RR Aftermarket ECU for the Royal Enfield Classic UCE 500 EFI

What if I understand ECUs and  want to program the ECU according to my requirements?

RaceDynamics offers a two versions of the ECU, one is a stock replacement ECU called the PowerTRONIC RS, and the other one is the fully programmable version of the ECU called the PowerTRONIC RR. The programmable version of the ECU comes replete with connectors that will help you hook it onto your laptop and make the desired changes to the code in the ECU. Like leading aftermarket ECU makers, RaceDynamics also gives you the option of downloading the code of the ECU through its website, so that you can make changes to the code before you apply it on the programmable ECU.

Does the RaceDynamics stock replacement ECU result in fuel economy gains?

Mileage is a factor that largely depends on the rider’s riding style. this said, some riders have reported gains in fuel economy  with the RaceDynamics stock replacement ECU on their Classic 500s, over the stock ECU.

Why has RaceDynamics not come up with a performance boosting ECU for the Royal Enfield Classic 500 like a better top end speed and overall power gain?

First of all, the aim of the RaceDynamics stock replacement ECU is to increase the riding pleasure for the rider of the Classic 500 by eliminating the various glitches the stock ECU has been plagued with.

Secondly, many Royal Enfield Classic 500 have reported violent fishtailing of the motorcycle at speeds exceeding 100 Kph. So, in the interest of our customers’ own safety, we have not programmed the ECU for better top end speed and more power although such potential does exist with the Classic 500’s UCE engine.

How can I buy the RaceDynamics Powertronic RS/RR ECU for the Royal Enfield Classic UCE500EFI and what is the cost?

The RaceDynamics PowerTRONIC RS ECU stock replacement is priced at INR 12,499 while the fully programmable PowerTRONIC RR ECU is priced at INR 15,999. To buy the ECU and the payment details, you may get in touch with the folks at RaceDynamics at +91 80 40929292 or email them on, info(at)racedynamics.in and sales(at)racedynamics.in. Currently, shipping is free although RaceDynamics may charge for shipping in the future.

Does RaceDynamics plan to export the PowerTRONIC RS/RR for the Royal Enfield Classic 500 to markets abroad. If so, what would be the price for the export versions of the ECU?

Currently, the RaceDynamics ECUs for the Classic 500 are being tested by our overseas importer. Shortly, we will begin exports of the ECU that will work with the export versions of the UCE500 engined Royal Enfields, which differ from the Indian versions by featuring the O2 sensor as standard. The prices of the export versions will be be announced shortly.

Going forward, can we expect any new features for the RaceDynamics ECUs for the Royal Enfield Classic 500 UCE?

RaceDynamics offers a very unique barometric sensors currently on its Car ECUs, which ensures that the ECUs work very well even in very high altitudes minimizing power loss. At high altitudes, rich mixtures are a big issue that reduce power produced by an engine massively. This barometric sensor will sense the change in pressure and altitude to ensure that the engine receives optimum fuel by leaning out the mixture suitably at very high altitudes.

This barometric sensor will be made available for Royal Enfield Classic 500 motorcycles in the future as Royal Enfields are the touring motorcycles of choice for many motorcyclists riding to the upper reaches of Himalayas like Leh and Ladakh. The barometric sensor will be designed to be a retrofit to the existing stock replacement ECU to work as a plug and play device so that it can be bolted on and off easily.

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