How to Clean a Motorcycle Carburetor

By Rachel Terry, eHow Contributor

 
 
 
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Clean a Motorcycle Carburetor

A filthy motorcycle carburetor can cause many different problems. If it's extremely dirty, the motorcycle may not start at all. If it's just mildly dirty, your motorcycle may be louder than it needs to be.

Things You'll Need

• Carburetor cleaner Tooth brush Screw driver Rags

Instructions

1. • 1
     First, you need to remove the carburetor. On some models, this may be a relatively easy thing to do. However, it may be necessary for you to remove the seat, side covers, and fuel tank in order to get the carburetor off.
   • 2
     Use a brush to remove loose dirt and grime. An old toothbrush that you were about to throw away works just fine for this.
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   • 3
     Remove the screws that hold the carburetor bowl on. Now you can get to the inside of the carburetor.
   • 4
     Using carb cleaner, which you can buy at auto parts stores, clean the inside of the bowl. If the bowl is full of grease or other foreign matter, you may need to use a stick to dig it out before you can clean the inside.
   • 5
     Use the tooth brush and carb cleaner to clean the other parts of the carburetor. When the springs, pins, and screws are all cleaned, your carburetor will run just like it did when it was new. Some people actually boil all of these parts in water to get rid of every last piece of grime. This is not necessary, but it will ensure that everything is clean.
   • 6
     Put the carburetor back together and re-install it on your motorcycle.

Read more: How to Clean a Motorcycle Carburetor | eHow.com http://www.ehow.com/how_4853021_clean-motorcycle-carburetor.html#ixzz2ExGbSlBa

How Does a Hypercharger Work on a Motorcycle?

By Michael Harris, eHow Contributor

 
 
 
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A hypercharger is an aftermarket component on motorcycles meant to increase engine performance. It is essentially a scoop-shaped air-filter housing which serves to increase pressure on the intake side of the engine.

Function

• A hypercharger is a side-mounted intake component with an opening facing in the direction of travel. When a motorcycle is in motion, the hypercharger capitalizes on the dynamic pressure of air being driven into it to create heightened pressure on the intake side of the engine. The result is an increase in power for the bike.

Limitations

• Because the impact of a hypercharger depends on air speed, it has virtually no impact on engine performance at lower speeds. This is in contrast to other means of forced induction, such as turbocharging.

Benefits

• Hyperchargers usually cost under $300 and achieve a gain of 4-9 hp. They are also extremely simple to install, and require no modifications other than rejetting the carburetor.

Read more: How Does a Hypercharger Work on a Motorcycle? | eHow.com http://www.ehow.com/facts_7709148_hypercharger-work-motorcycle.html#ixzz2ExGHxSr6

How to Measure a Motorcycle Exhaust

By Alexander Poirier, eHow Contributor

 
 
 
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Measuring the noise level of your motorcycle's exhaust will ensure that your motorcycle is not in violation of the federal noise law.

By federal law, a motorcycle's exhaust cannot "exceed a noise level of 84 decibels when traveling more than 35 mph on a paved street or highway." Any motorcycle whose exhaust exceeds this amount of noise is subject to citation and a fine. Because of this, it is important to check the noise level of your motorcycle's exhaust to ensure it does not exceed the designated federal noise level. Luckily, this can be done with a few tools in a matter of minutes.

Things You'll Need

• Type 1, Type S1A, Type 2, or Type S2A sound level meter
• Sound level calibrator
• Tachometer
• Assistant

Instructions

1. • 1
     Park the motorcycle on a flat, even, solid surface. The location should be quiet and should not have any obstructions that could reflect the sound coming from the motorcycle exhaust -- this includes walls, cars and signs.
   • 2
     Turn on the sound level meter and the sound level calibrator. Aim the calibrator towards the sound level meter's microphone. The calibrator will emit a specific frequency, indicated somewhere on the calibrator. The sound level meter will then calibrate using this frequency. If the sound level meter fails to display the correct frequency, contact the meter's manufacturer for repair instructions.
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   • 3
     Connect the tachometer to the motorcycle per the instructions that came with it.
   • 4
     Position the rider so that he is straddling the motorcycle seat with both of his feet touching the ground, in normal riding position.
   • 5
     Position the sound level meter exactly 20 inches behind and at the same height as the motorcycle's exhaust. The microphone must also be parallel to the ground and positioned at a 45 degree angle when compared to the motorcycle's normal line of travel.
   • 6
     Place the motorcycle's gears into the neutral position. Have the rider run the engine at 35 mph, displayed on the tachometer.
   • 7
     Record the decibel output of the exhaust at 35 mph. If it exceeds 84 decibels, the motorcycle's exhaust is in violation of the federal noise law.

Read more: How to Measure a Motorcycle Exhaust | eHow.com http://www.ehow.com/how_7662349_measure-motorcycle-exhaust.html#ixzz2ExFlAHOr

How to Tune Motorcycle Carburetors

By Cheryl Macman, eHow Contributor

 
 
 
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While you love riding your motorcycle, you might not enjoy tinkering with its engine or bothering to understand how the engine works. However, even motorcycle owners who usually turn to a trusted mechanic for repairs and upkeep can learn to tune their motorcycles' carburetors themselves. With the right guidelines, a little practice, and some time, you can save yourself the mechanic's tuning fee, helping to keep the motorcycle functioning at its best.

Things You'll Need

• Carburetor cleaner
• Rag
• RPM gauge
• Screwdriver

Instructions

1. • 1
     Clean the carburetor by spraying it with carburetor cleaner. Use a clean rag to wipe away the cleaner. A clean carburetor will enable your motorcycle to idle smoothly.
   • 2
     Turn the engine on. Let it idle until the engine feels warm. Look on the side of the carburetor barrel for the mixture screw. You will find it 2/3 down from the barrel top and it will be sticking out straight from the barrel.
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   • 3
     Remove the vacuum hose that connects to the carburetor. Connect an RPM gauge to the spot where the vacuum hose attaches. The RPM gauge must have the ability to show readings of at least 1400 RPMs.
   • 4
     Twist the mixture screw with a screwdriver to the right. Continue until the engine sounds like it is at high idle, at about 1400 RPMs.
   • 5
     Turn the screw back to the left slowly. Continue till you hear the engine reach the point right before it would cut off. This should be about 1000 RPMs.
   • 6
     Remove the gauge and reattach the vacuum hose to check the engine. If the motorcycle fails while idling, adjust the screw to the right to where the gauge reads closer to 1100 RPMs.

Tips & Warnings

• Park the motorcycle on flat, even pavement while working on it.
• Make sure the motorcycle is not too hot to the touch before beginning tuning.

Read more: How to Tune Motorcycle Carburetors | eHow.com http://www.ehow.com/how_7587944_tune-motorcycle-carburetors.html#ixzz2ExFApGme

How Does a Motorcycle's Exhaust System Work?

By Isaiah David, eHow Contributor

 
 
 
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Decorative Function

• In a car, the exhaust system is simply a utilitarian device meant to process the exhaust and reduce its environmental effect and noise. Motorcycle exhaust systems are different. Motorcycles often have chromed, decorative exhaust tubes that port the gasses away from the engine. Rather than having a single tube to port the spent gas from the whole engine, a motorcycle may have two or even four tubes flowing from the different cylinders. This increases gas flow, making the motorcycle perform more efficiently. More importantly, it looks great.

Exhaust Basics

• When the engine expels hot gasses, they are routed into tubes. They flow down in one, two, or four tubes into the catalytic converter. The catalytic converter contains a catalyst, a substance that makes it easier for certain chemical reactions to occur. For example, it turns much of the carbon monoxide in the exhaust into carbon dioxide, a less harmful gas. After that, it flows through to the muffler. The muffler has a resonating chamber specially designed to cancel out the sound waves from the motorcycle engine. The waves reverberate around in the chamber, partially canceling each other out and reducing the sound of the motorcycle.

That Noise

• Some motorcycle drivers like their bikes to make a lot of sound. It makes them more noticeable to cars, and gives their bikes a theatrical roar. A motorcyclist gets this sound by installing a muffler that provides less noise cancellations. For example, a cherry bomb is a straight metal tube with holes in it covered by glass to insulate some of the sound. There is no resonating chamber at all, so the motorcycle makes much more noise.

Read more: How Does a Motorcycle's Exhaust System Work? | eHow.com http://www.ehow.com/how-does_4696796_motorcycles-exhaust-system-work.html#ixzz2ExESJSfG