u/Mountain_Barber_2373

I will be very happy when someone gives me an feedback about this metallic clicking noise
The bike itself it’s a 2017 MT07 RM17 with 22,000 km

Quick update: I disassembled the machine at least I took the tank off to see if any gas lines or something is leaking, but I found nothing. I wanna also post some pictures from the live data I was reading.

Hi everyone,

I’m experiencing a peculiar issue with my Yamaha MT-07 and would appreciate your insights before I begin replacing parts.

The bike has approximately 20,000 kilometers (12,400 miles) on the odometer and is equipped with a registered and road-legal Akrapovič exhaust system.

According to the registration documents, the bike is registered as an A2/35 kW version. However, upon inspecting the bike, it appears to be mechanically unrestricted.

There are no restrictor plates in the airbox or intake, allowing the engine to receive the full amount of air. The throttle stop also seems identical to that of a full-power MT-07. Additionally, there’s a small yellow electronic box or module installed on the bike, which I suspect may have been part of an aftermarket A2 restriction kit, but it’s currently disconnected from anything.

Therefore, mechanically, the motorcycle operates as a full-power bike despite being registered as an A2 bike.

My primary concern is the exceptionally high fuel consumption.

I’ve ridden the bike for about 400 to 500 kilometers so far and have already had to refuel more than five times. The fuel consumption displayed on the dashboard also appears to be unusually high.

For instance, while riding at approximately 50 to 60 kilometers per hour in the fourth gear, the instantaneous fuel consumption display can show around 30 to 35 liters per 100 kilometers, even without accelerating excessively hard.

The average consumption has also been displaying figures around 17 liters per 100 kilometers, which seems completely unrealistic for an MT-07.

I understand that the instantaneous consumption display can fluctuate significantly during acceleration, so I’ll also perform a thorough full-tank-to-full-tank calculation. I’ll completely fill the tank, reset the trip meter, ride normally, and then refill it to determine the actual consumption.

However, there’s another factor that raises my suspicion that the engine may be running very rich:

There’s a strong smell of unburned petrol emanating from the exhaust.

If the bike is idling and I give it a quick rev, the smell of petrol becomes extremely strong, almost as if someone had spilled petrol nearby. This smell is definitely much stronger than I would expect from a normally running motorcycle.

I’ve already connected a diagnostic tool to the bike. There are currently no fault codes stored, and the live sensor values I checked didn’t immediately look abnormal.

The coolant temperature also seems normal. In very hot weather, around 38–39°C outside temperature, the engine can reach approximately 100–105°C. During cooler evening or night riding at around 28–33°C outside temperature, it normally stays around 90°C.

Another thing I noticed is the starting behavior. When starting the bike, the starter usually has to turn the engine over approximately two or three revolutions before it starts. It doesn’t fire completely instantly. I’m not sure if this is normal behavior for the CP2 engine or if it could somehow be related to the fueling issue.

The air filter looks slightly dirty, but not excessively clogged.

My current thoughts are:

- The lambda/O2 sensor might be giving incorrect or slow readings without triggering a fault code.
- The injector might be leaking or dripping, or it could be experiencing excessive injector flow.
- The fuel pressure might be incorrect.
- The engine might be running excessively rich for another reason.
- There might be an ignition problem causing some fuel not to burn properly.
- Something related to the previous A2 restriction or derestriction might be causing the issue.
- There could be an ECU modification or incorrect mapping from a previous owner.
- Something related to the Akrapovič exhaust setup or a previous ECU tune might be causing the problem.

Before replacing anything, I plan to monitor the live data from the lambda/O2 sensor with the engine fully warmed up.

Has anyone experienced something similar on an MT-07, especially at around 20,000 km?

I would especially like to know:

- What lambda/O2 sensor readings should I expect on a healthy MT-07 when the engine is warm?
- Could a faulty lambda sensor cause extremely rich running without storing a fault code?
Could the Akrapovič exhaust or an incorrect ECU map cause symptoms like this?
Is there anything related to the A2 restriction system that could cause excessive fueling after the mechanical restrictors have been removed?
Is the engine cranking two or three revolutions before starting considered normal on the MT-07?
Are there any common MT-07/CP2 problems that could cause a strong raw petrol smell and very high fuel consumption?
Is there anything specific I should check at around 20,000 km that could be related to this?

Any advice on what I should test next would be appreciated. I would prefer to diagnose the problem properly before randomly replacing sensors, injectors or other parts.

Thanks!

Ich verstehe wirklich nicht was bei manchen Menschen im Kopf abgeht