6 Common Triumph Trident 660 Problems (With Easy Fixes)

With a top speed of 212 km/hr, a fuel economy of 18 km, a reliable chassis, and a powerful 660cc engine to produce magnificent 80 HP power and 47 ft-lb torque, the Trident 660 is a great motorcycle for beginners and advanced riders.

Trident 660 is a reliable bike with added features and several notable problems along the way.

The common Triumph Trident 660 problems are a stalling engine, ineffective vibration damping, faulty ABS disk brakes, bad sensors, coolant leaks, transmission, overheating, inaccurate fuel gauge, and a couple of issues related to the battery.

If you want to get a Triumph Trident 660, take a look at these problems and a way to fix them in this guide to make it great once again and get the best of both worlds.

Let’s get started!

Triumph Trident 660 Problems

Triumph Trident 660 Problems

1. Decelerating Engine Stalling/Cutting

An engine stalling is the most common problem in Triumph Trident 660 and a serious one too. Triumph even had to recall this machine for a replacement and fix.

The problem still arises, particularly when your meter hits 2000-3000 miles in running and the engine starts dying when you are decelerating while you pull the clutch for a shift.

Some owners face it consistently, some occasionally, some of them periodically, while some don’t face it at all. However, the problem is genuine, as it sometimes occurs in the 2nd, 3rd, or 4th gear at 4000 to 6000 RPM with or without idle.

 Many areas to look into for this issue, particularly the engine department and its fuel injection lines and MAP sensor hose. Also, you should clean the hoses, which is going to be a quick fix.

Also, the ECU is the next thing causing issues, and fixing it can let you go smoothly. Also, don’t pull the clutch before you hit the break; this can also cause engine cutting.

2. Warped ABS disks with Vibrating Handlebar and Mirrors

Many Triumph Trident 660 owners reported weak brakes and faults in the rear ABS disk after certain miles on the meter, limiting the performance of braking.

Well, this is not a known fault by the manufacturer but instead an issue with the cause on the rider’s end.

The problem occurs when you hit the 5k+ miles, and your rear brake disc just distorts due to excessive friction and heat, and it affects the performance.

So, the only option for you to fix it is by replacing them as this doesn’t come in high quality.

So, you should invest in something better and more reliable.

The brake fails also due to vibration, and the vibration is killing as it’s noticeably higher in mirrors, handlebars, and the seat. Trident 660’s vibration damping is questionable sometimes, especially on high revs. But there are reasons for that.

You may face this issue more often if you are mostly riding on highways and carpet roasts because this isn’t meant to be there always.

The mirrors may start to lose. For them, put a rubber washer under the nut, and it will be gone.

3. Bad Temperature Sensor, Coolant Leak, and Overheating issue

All these heating-related issues do occur in Triumph Trident 660, and they are also common. First of all, there’s a common issue with temperature sensors. It sometimes shows a false warning on overheating when you start your bike.

The potential fix to this is replacing the temperature sensor if there’s no wiring issue. Or there could be a relay fix that is leading to this notification.

Also, a software update might be necessary if you haven’t done it so far; it may be causing this issue.

However, there’s a genuine one, too, if your bike overheats. Overheating sometimes can cause engine stalls. If your machine is having trouble with coolant, it will come.

Whether the coolant is leaking, there’s not enough coolant inside, or the coolant itself is boiled due to heat, the fan is not starting properly or not working at all. All these things lead to coolant issues and, eventually, overheating.

A faulty radiator and sensors can also contribute to the causes.

Overheating is common in hot climates and in city traffic. If the radiator is leaking, you need to get it checked and fixed as soon as possible.

Make sure there’s enough coolant in the box, and refill when it goes down. Opt for a high-quality OAT coolant to get the best out of it.

If the coolant is excessively draining up, check for any leak due to an impact or an accident, just replace it.

If there’s no leak, check for its coolant and temperature sensor, this is more likely to be the greatest fix then, or look for a software update.

4. Gear Transmission issue

Not a common issue for its owners, but a few reported them and it’s worth noticing. The owner faced an issue when he was riding this machine, and the bike dropped to 3rd gear from the 6th.

It was unpredictable, unusual, and all of a sudden.

However, the bike was unable to shift higher or lower than the 3rd gear. This is highly likely to be a gearbox internal issue causing this transmission failure.

The gear shifter located inside is disengaged from the gears and the only solution is to open the gearbox assembly and figure it out.

You need a professional mechanic who can find and engage the shifter back. It may be disengaged, loose, or damaged due to a clash of components (if you heard any sound).

Also, the clutch can contribute if it’s not engaging or disengaging properly.

5. Inaccurate Fuel Gauge

One of the most common Triumph Trident 660 Problems is its inaccurate fuel gauge that monitors the fuel in the tank, sometimes inaccurately.

When you refill the gas to certain bars, it doesn’t show the exact reading. It just measures less than the actual, even if you fill the tank.

Out of all the bars, the last one and sometimes the second last too is inaccurate, providing wrong reading. This is mostly due to software-related issues, and it needs to be calibrated in a way. 

For that, overfill the tank, start your bike drive it a mile or so, and let it calibrate itself. The gauge is not precise, and this trick can fix it. It happens due to a bad sensor and connectors which you can replace to fix it.

Another thing you can do is reset the trip meter if you are getting inaccurate readings.

6. Battery Issues

A “not charging” battery is another problem in the Triumph Trident 660 due to bad fuses and battery health issues.

These issues can sometimes affect the working of electrical components, including indicators, headlight, brake lamp, meter, electric fan, and a horn.

To fix this, start by making sure there are proper volts and your battery is live. Switch off your bike, take the keys, and visually explore the battery.

See if the main fuse is fine which is located somewhere around the starter solenoid, that helps start the spark plug and your bike.

If that fuse is great, check for any potentially incorrect connection. Fix them by properly disconnecting the battery first and also checking its voltage.

Then, another area is to look for any damaged wiring by looking at its schematic.

Check for any short circuits if the wire is naked and touching any metallic part. If nothing like that, your fuse is not working. Just replace it.

After going through all these checklists, your battery will be good again.

Is Trident 660 Worth Buying?

It totally depends on your personal needs or choice. This motorcycle has some great features, such as a powerful engine, easy handling, LED lights, traction control, and stylish design.

Also, its seat is uncomfortable and the suspension is firm which can make your ride terrible.

So, if you can compromise on this, then it’s worth buying for you. If comfort is your priority and you want to buy this motorcycle, then I would suggest you change its seat and suspension with an aftermarket one.

Is Triumph Trident 660 Reliable?

We’ve found the Triumph Trident 660 a well-built and reliable motorcycle. This is because its engine performance and build quality are great.

However, it has some minor concerns such as engine stalling, gear transmission, coolant leakage, overheating, and battery issues. But the good thing is these issues are relatively easy to fix without breaking the bank.

So, we can say this motorcycle is overall reliable for anyone who wants a balance of performance and versatility.

Is Triumph Trident 660 liquid-cooled?

Yes, it is liquid-cooled.

Triumph Trident 660 Users Feedback/Reviews:

“I added nearly every optional extra with this bike, protection, connectivity, etc negative points- Triumph heated grips are absolutely rubbish don’t waste your money, connectivity package, and triumph app rubbish don’t waste your money! Seat cheap feel and rubbish material rip easy! On the hard side but sat on worse !! Fuel consumption! I don’t know how people get more than 45 mpg. They must ride like old ladies. I averaged 35- 40 mpg and riding at not even flat out I got 22 mpg on the twisty roads. Now good points Light agile handling really brilliant handling and amazing tyres as standard inspired confidence, So overall a good not brilliant bike as reviewers would have you believe, I sold mine after 5 months got bored of the harsh ride and overall bike. The engine is nice but thirsty when you use it hard.” Source: Triumph Trident 660 Review

“Performance is awesome no words to say it feels like I am controlling a monster. Comfort has to be a little bit upgraded, Looks like this monster was like a wounded lion in Safari just joking looks awesome. Overall it was a great street bike.” Source: Triumph Trident User Reviews and Ratings

Technical Specifications of Triumph Trident 660:

Specification Details
Engine TypeLiquid-cooled, 12 valve, DOHC, inline 3-cylinder
Engine Displacement660cc
Max Power EC81 PS / 80 bhp (59.7 kW) @ 10,250 rpm
Max Torque EC47 lbft. @ 6,250 rpm
ExhaustStainless steel 3 in 1 header system with low single-sided stainless steel silencer
Final DriveX-ring chain
ClutchWet, multi-plate, slip & assist
FrameTubular steel perimeter frame
SwingarmTwin-sided, fabricated steel
Front WheelCast aluminium, 17 x 3.5 in
Rear WheelCast aluminium, 17 x 5.5 in
Front Tyre120/70R17
Rear Tyre180/55R17
Front SuspensionShowa 41mm upside down separate function forks (SFF), 120mm travel
Rear SuspensionShowa monoshock RSU, with preload adjustment, 133.5mm rear wheel travel
Front BrakesNissin two-piston sliding calipers, twin 310mm floating discs, ABS
Rear BrakesNissin single-piston sliding caliper, single 255mm disc, ABS
Seat Height805mm
Dry Weight189 kg
Fuel Tank Capacity14 litres
Cruising Speed212km/hour
MPG17.47 km/l
Source: Triumph Trident 660 Specifications


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Trident 660 Review

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