5 Triumph Rocket 3 Problems [With Easy Fix]

Rocket 3 is an outstanding beast by Triumph. Due to its four-stroke, three-cylinder overhead liquid cool, 2458cc engine, the Triumph Rocket 3 is known to be in the top 3 largest motorcycles in the world according to engine size.

For this massive engine, the output figures are enormous too.

Before putting a bundle of money into this motorcycle, you should be aware of its problems. These problems can be devastating and pretty expensive and technical to fix

But in this Triumph Rocket 3 Problems guide, you will get the list of issues and solutions for each.

Triumph Rocket 3 Problems

The common Triumph Rocket 3 Problems are TFT issues, ECU failure, oil leaks, rusting issues, rear brake cylinder issues, rectifier, electrical, transmission, bearings, and rough idling issues are the most prominent ones.


1. ECU And TFT Display Issues

We all know Triumph Rocket 3 is a premium and flagship motorcycle. Triumph makes its way to the flagship by adding several electronics for the assistance of its owner.

Almost all of the electronics in a motorcycle are tied to the central command which is known as ECU, also known as control unit.

Working of ECU is the first reason for working of all electronics in a motorcycle. Unfortunately, our investigation and analysis show a catastrophic failure of ECU in Triumph Rocket 3 making things terrible for the safety of the rider and motorcycle. 

Failure of ECU genuinely affects a lot of electronic parts in Rocket 3. There are certain components of the ECU system which fail intermittently.

It was pretty much a common problem in early 2020 models and the fix for this issue was to simply replace the ECU entirely. Later, however, Triumph recalled models with these issues and replaced the ECU for free and it was fixed.

As for the electronics issues, there may or may not be many problems. 

However, one problem is for certain. It is the failure of Rocket 3’s TFT screen which is the main source of communication interface between you and your motorcycle. It shows plenty of information about the motorcycle and the current trip.

Unfortunately, this TFT screen on Rocket 3 fails all of a sudden, turns out to be completely black when you are trying to start your motorcycle, and cuts off the engine from starting properly.

These TFT displays are mostly available in premium motorcycles due to so many reasons and advanced technology in them. Failure of TFT leads the entire motorcycle to a blackout. 

Unluckily, there is no proper fix for that other than replacing its fuses or replacing the complete unit with a new TFT screen.

It’s not covered under any recall so the latter option is going to be an expensive fix for its owners if fuse replacement doesn’t work.

2. Oil And Corrosion Problems

It is another problematic failure in Triumph Rocket 3 that you cannot ignore because it will keep getting worse and your motorcycle will be in big trouble someday. 

Leakage of oil in a motorcycle is one of the warnings that might lead to problems in the engine and cause more trouble in the long run. Fortunately, the problem does not exist in the current and new versions of Triumph Rocket 3.

Because it’s an issue from long ago. 

If you are planning to get an old Rocket 3, it might have this oil weep problem in its final drive system of transmission which may cause loss of a lot of oil and compromised lubrication.

The oil leak is more prominent in its transmission and it led the Triumph Rocket 3 to a complete recall on this issue.

Triumph fixed the issues on early models and the issue never occurred again. If you are interested in recent Rocket 3 models, you will be safe. Make sure to check leakage if you opt for an older model.

Other than its oil leakage there have been a few reports of rusting components as per your analysis and research. Fortunately, the corrosion is not so immense or on a large scale that might have plagued a certain model.

Instead, there is a minor rusting appearing on the screws, nuts, bolts, catalytic converter, chrome wheels, mounting heads, and a couple of other surfaces even if the bike has never been in salty water.

To get rid of rusting parts, you can use vinyl coating if you love the idea.

Otherwise, you can claim the warranty if the motorcycle is still under warranty and replace rusty parts with brand-new ones. Otherwise, you should be replacing them yourself.

Make sure to protect this beast from salty moisture, acids, detergents, heavy soaps, or liquid foams, and also make sure to lubricate its components with oil.

3. Rear Brake Modulator And Cylinder

Another recall for Triumph Rocket 3 due to issues with the rear brake. 

The recall was in the United States and it was the biggest recall for this model covering more than 3500 models manufactured in that era. The recall was on 2020 and later models and it is the most recent recall for Triumph Rocket 3.

Our team was running an investigation and we found the reason for this problem was due to the failure of the rear brake cylinder.

This cylinder was not working greatly for many reasons, prominently due to size difference and the influence of air in the braking fluid delaying the braking distance and effectiveness.

The delay in braking ability and smoothness of braking leads to a potential safety risk. At some moment, the brakes may go free or lock the rear wheel at high speed.

However, Triumph took it seriously and offered a recall for all these models for the safety of their customers.

For the rear cylinder, you can install a large one to overcome the displacement of braking fluid. Of course, this one is an expensive fix but recall makes it completely free.

If you have paid for the service already, you can claim the refund from the service center or dealership until it’s open.

4. Rectifier And Electrical Problems

Rocket 3 is also not safe from electrical and ignition-related failures leading the motorcycle not to start correctly. The rectifier converts the AC voltage into DC for the functioning of the entire electrical system. 

Once it successfully converts the voltage into DC and it’s usable by the system, the very next job for a rectifier is to conduct a check and regulate the voltage

It makes sure the functioning is right and doing so will not damage the battery either. But this rectifier is faulty mostly in the old Rocket 3 models.

The rectifier may go bad and ruin the battery in the long run. It can also blow the ignition switch which is one of the common electrical problems in the Rocket 3, old models. 

For the most recent models, the issue is not common since Triumph has made several improvements to restore the proper functioning of the rectifier.

The rattling noise from the engine is also due to some problem but it’s not pretty common in Rocket 3. To fix the rectifier, you need to make sure if it’s malfunctioning or not.

Start by checking its battery voltage and make sure the reading is no higher than 14.5 volts and not less than 13.5 volts either. If the voltage is higher, your battery might also be at risk which you will need to replace immediately.

Instead of repairing the rectifier, you should replace it, which is an easier but expensive option. However, it will keep working for long as compared to the tripping rectifier which you just repaired.

There are several other electrical problems too, such as the ignition coil, switch, and failure of the instrumental panel.

5. Transmission And Bearings Problem

Transmission and bearing problems on Triumph Rocket 3 are somehow related to each other. Transmission issues are dominated by the influence of gears shifting problems, false neutral, hard-to-shift middle gears, and similar or a few other problems at high speed.

The output shaft bearing, improper bearing oil, failure of breakage of spring, and lack of lubrication lead to transmission problems.

Some of our team members reported that the bearings are installed slightly in a different position making troubles for oiling and leading to deceleration as well.

It is a major problem but it’s still fixable if you opt for the update kit which Triumph users.

They update the spring, add a new bearing, replace their seals, add perfect lubrication, and work on greasing and proper oiling which fix these issues and also eliminates the engine noise occurring through the cam chain tensioner, poorly synced valves, and worn out pistons if the motorcycle was not maintained pretty well.

Is Triumph Rocket 3 A Reliable Motorcycle?

Triumph Rocket 3 is a reliable motorcycle due to its enormously powerful engine. It comes with a 2458cc four-stroke three-cylinder engine providing an endless 165 HP and similar torque figures.

The motorcycle is heavy and is not a match for beginners but expert and pro riders.

It offers several functions and convenience features including traction control, ABS, keyless ignition, cruise control, LED lights, quick shifters, USB charging ports, heated grips, and a lot more.

However, it does have several problems such as bearings, rectifiers, brakes, and rusting. These problems are fixable and make the Rocket 3 a reliable motorcycle in the long run.

The resale value is amazing and Triumph keeps providing and fixing the problems in regional recalls for free. If you are a professional motorcyclist looking to upgrade, you can rely on Rocket 3.

Triumph Rocket 3 User Reviews:

“Well, over 5000 miles there is a lot more to this bike than just the size of the engine. For its size the handling and braking are both a lot better than expected, never going to be a sports bike but on the right road with the right rider can be closer than you expect.” Source: motorcyclenews.com

“Handling and acceleration are awesome. 2500cc of pure muscle going forward and brakes to match stopping. It goes around corners like it does on rails. The only issue I have is some of the nuts and fixings have corroded within a couple of months despite not being ridden in salty weather.” Source: motorcyclenews.com


Triumph Rocket 3 – Wikipedia

Recall Triumph Rocket 3 models – Motorcycles News

2023 Triumph Rocket 3 R | Road Test Review | Rider Magazine

1 thought on “5 Triumph Rocket 3 Problems [With Easy Fix]”

  1. The starting problem/dead screen I have had multiple times, reseat the fuses makes the problem go away. Usually after the bike has been sitting a while or after a dead battery.

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