Why is my Yamaha Raptor backfiring?

Why is my Yamaha Raptor backfiring?

Backfiring occurs when a minor explosion takes place in the engine’s intake or exhaust as the spark plug ignites the fuel that has escaped the combustion chamber. This occurs when there is an imbalance in the fuel to air ratio (among other reasons). The fuel to air mixture is too lean or rich.

How much compression should a 660 Raptor have?

Yamaha Raptor 660

Why does my Raptor 350 backfire?

The cam chain is probably stretched and needs to be replaced. Pull the center bolt out of the chain tensioner then the two bolts holding it to the jug and count the number of clicks that are left, when the chain stretches the cam gets out of time and causes it to backfire at idle.

Why is my 660 Raptor smoking?

There’s really only 2 factors that can cause the engine to smoke. Smoking while it’s sitting and running is valves not seating or the valve seals are bad. And smoking while your into the gas is most likely the rings. Check your ring gaps, if they’re over the specs, then you will need new rings.

What causes a UTV to backfire?

Why do ATV’s Backfire? ATVs usually backfire because of a short, sudden moment where the engine is running too rich or too lean. That means that it’s either getting more fuel than it needs for the amount of air it takes in, or else not enough.

How do you know if your ATV is running lean or rich?

A black dry fluffy colored plug is caused by deposits from a carburetor that is running too rich (too much gas), or excessive idling on some engines. Black smoke coming from the exhaust is a sign of a rich air/fuel mixture.

How wide is a Yamaha Raptor 660?

Dimensions – Overall dimensions are 72 x 43.3 x 45.3 inches (1,830 x 1,100 x 1,150 millimeters – L x W x H). The minimum ground clearance is 10.4 inches (265 mm), while the vehicle wheelbase is 49 inches (1,244.6 mm). Curb weight is 193 Kg/426 lbs, and dry weight is 398 lbs/180.5 Kg. The seat height is 33.9 inches.

Why does a four stroke engine backfire?

The spark inside the chamber may not burn up all the fuel, allowing a little extra gasoline vapor to enter the exhaust, and lead to a backfire. This can be caused by a faulty mass airflow sensor or a clogged engine air filter “choking” the engine and not allowing enough oxygen to flow into it.

What does it mean when your four wheeler backfires?

ATVs usually backfire because of a short, sudden moment where the engine is running too rich or too lean. That means that it’s either getting more fuel than it needs for the amount of air it takes in, or else not enough.

Why does my ATV bogs down when I give it gas?

The most common reason when an ATV bogs down when giving gas is a dirty air filter and/or carburetor. This happens when the ATV is continuously used after some time. Fixing these issues is easy – clean the air filter and/or check and adjust the carburetor.

Can running Rich damage engine?

When a car is running rich, it means the engine is receiving too much fuel and too little air. When left unchecked, though, a rich-running engine can degrade your car’s catalytic converter by clogging it with sediments produced by burning the excess fuel.