Exhaust Pipes & Muffler

Exhaust systems perform a wide variety of functions on modern motorcycles and off-road vehicles; including increasing engine performance, reducing exhaust noise, decreasing the amount of harmful components contained in exhaust gas and cooling the temperature of exhaust gas.

The Feature of Parts

  • Exhaust Settings Linked to Engine Control
  • Aesthetic Design to Match the Motorcycle Body
  • Meet Yamaha's High Standards for Durability and Corrosion Resistance


Periodic Inspections & Maintenance

Inspect the exhaust system for loose mounted parts, damage and exhaust gas leaks.

Loose Parts and Damage Inspection

Check the connecting parts, screws, bolts and other hardware of the exhaust pipe and muffler for looseness. Check also the muffler protector to ensure it is on tight. Do a visual inspection for damage, exhaust gas leaks and other potential for coming into contact with other parts.

Exhaust Function Inspection

Vary the engine speed while listening for abnormal exhaust noise. Check visually for white or black smoke in the exhaust gas.
Wear protective gloves as the exhaust pipe becomes very hot during operation. Also, ensure there is adequate ventilation in the inspection location. Closed garages in particular pose a risk if exhaust gas builds up.

Table of Items to Regularly Inspect

Refer to the applicable service manual for the inspection and maintenance procedures.

General Periodic Maintenance
Exhaust system Check for leakage.
Tighten if necessary.
Replace gasket(s) if necessary.
*Since these items require special tools, data and technical skills, have a Yamaha dealer perform the service.

Problems and Counter-measures

White Smoke from the Muffler

This can be due to two causes.

The first is actually steam produced when water is heated inside the exhaust system. Hydrocarbons are converted to water in the catalytic conversion process, so this white steam means your catalytic converter is working correctly. White steam is especially common at low temperatures.

The second is smoke resulting when the air-fuel mixture mixes with engine oil during combustion. Wear to the piston ring and cylinder may lower the air tightness, permitting a large amount of engine oil to enter the combustion chamber. In addition to white smoke, other symptoms include an increase in the engine oil consumed, and poor engine revving and output.
White smoke may be produced even over short distances if an engine oil with low lubricity.
Replacement of the piston ring and even the cylinder may be required.

Black Smoke from the Muffler

When there is too much gasoline in the air-fuel mixture, it may not combust completely, resulting in black exhaust gas.
Causes for the air-fuel mixture imbalance include air cleaner clogging and a large fuel discharge volume due to a malfunctioning fuel system sensor.
For an air cleaner problem, the air cleaner element can be replaced—wet type elements can be cleaned to restore the intake to normal. For fuel system sensor problems, see your local Yamaha dealer for a diagnosis and repair.

Frequently Asked Questions

[Questions About Exhaust System Performance]

Q1: Can I increase my exhaust system power with a non-genuine exhaust system?

A1: Aftermarket parts that provide increased power at low AND high engine speeds are extremely rare. Some boost the power within a specific speed range, but do so at the sacrifice of power at other speeds. Genuine Yamaha exhaust systems are geared to provide power at all speeds by integrating the control of the intake air volume, quantity of fuel discharge volume, ignition timing, EXUP and other factors.

Non-genuine exhaust systems usually make the engine power output rise quickly in a very narrow engine speed range. This is referred to as making the engine "peaky" - which reduces low speed engine power, making the vehicle less responsive, reducing acceleration and making the vehicle less fun to ride at all speeds.

Q2: I'm not getting as much power from my motorcycle lately. Will replacing the exhaust system improve the power?

A2: Modern motorcycle exhaust systems are very reliable and durable. Possible causes for a loss of engine power include a drop in the intake air quantity due to a clogged air filter element, a change in the air-fuel mixture due to an air leak in the intake system, engine misfiring due to spark plug wear or fouling, a loss in drive power transfer due to wear of the drive system or trouble with some portion of the electronic controls on the motorcycle.
You should have your local Yamaha dealer inspect your motorcycle if you notice a decrease in engine power or loss of speed.

[Questions About Maintenance]

Q3: How should I clean my plated exhaust system?

A3: Use a plating cleaner and soft cloth to wipe the exhaust system clean. Avoid wiping with a hard cloth, a brush or a cleaner containing a compound as the plating surface may scratch. Once damaged, plating cannot be restored, so special care should be used in maintaining the exhaust system.

Q4: How should I clean my painted exhaust system?

A4: Use a non-abrasive cleaner and a soft cloth. Abrasive cleaners will remove the paint, leading to corrosion. Although heat-resistant paint can be purchased to restore such damage, the glossy heat-resistant paint used on the FZ1 is particularly difficult to repair.

Q5: How do I get rid of the burn marks on the exhaust pipe?

A5: Burn marks will not come off merely with water. Products are available for purchase to clean off burn marks. Be careful to purchase a product that is appropriate for the metal composition of your exhaust pipe.