Home
American Cycles
Asian Cycles
European Cycles
General Manuals
Carb Manuals
Parts Links
Motorcycle Pics
ATV & UTV
Snowmobiles
Cycle Salvage
Moto Museums
Cycle Links
Car Manuals
Car Brochures
Antique Engines
Aviation Manuals
Tractor Manuals
Firearm Manuals
Vintage Moto Art
Event Posters
Contact
 


BASICS OF CARBURETOR OPERATION
 The basic secret of carb function is that inside each carb are thousands of tiny gnomes; each with a small bucket. As you open the throttle,more of these gnomes are allowed out of their house and into the float bowl, where they fill the buckets and climb up the carb's passages to the intake, where they empty their buckets into the air stream. But, if you don't ride the bike for a while, bad things can happen. Tiny bats take up residence in the chambers of the carb, and before long the passages are plugged up with guano.
 This creates a gnome traffic jam,and so not enough bucketfuls of fuel can get to the engine. If it gets bad enough, the gnomes simply give up and go take a nap. The engine won't run at all at this point. Sometimes you'll have a single dedicated gnome still on the job, which is why the bike will occasionally fire as the gnome tosses his lonebucket load down the intake.
 There has been some research into using tiny dwarves in modern carbs. The advantage is that unlike gnomes, dwarves are miners and can often re-open a clogged passage. Unfortunately, dwarves have a natural fear of earthquakes, as any miner should. In recent tests, the engine vibrations caused the dwarves to evacuate the Harley Davidson test vehicle and make a beeline for the nearest BMW dealership. Sadly, BMW's are fuel injected and so the poor dwarves met an unfortunate end in the rollers of a Bosch fuel pump.
 Other carb problems can also occur. If the level of fuel in the float bowl rises too high, it will wipe out the Section 8 gnome housing in the lower parts of the carb. The more affluent gnomes build their homes in the diaphragm chamber, and so are unaffected. This is why the bike is said to be "running rich". If the fuel bowl level drops, then the gnomes have to walk farther to get a bucketful of fuel. This means less fuel gets to the engine. Because the gnomes get quite a workout from this additional distance, this condition is known as "running lean".
 The use of the device known only as the 'choke' has finally been banned by PETG (People for the Ethical Treatment of Gnomes) and replaced by a new carb circuit that simply allows more gnomes to carry fuel at once when the engine needs to start or warm up. In the interests of decorum, I prefer not to explain how the 'choke' operated. You would rather not know anyway.
 So, that's how a carburetor works. You may wish to join us here next week for electricity 101, or "How your bike creates cold fusion inside the stator, and why the government doesn't want you to know about it."



Amal 600 900 Concentric Carburetor Carb Technical Tuning Manual Download

Amal 375 379 389 Monobloc Carburetor Carb Technical Tuning Manual Download

Amal MK2 Carb Carburetor Technical Tuning Service Manual Download

Amal Pre-Monobloc Carburetor Carb Technical Tuning Manual Download

Amal Strangler DB Carb Carburetor Technical Tuning Manual Download



Carter RBS 1-V Carburetor Service Manual Download

Carter BB BBR Carburetor Service Manual 1939 and Later Download

Carter BBD Carburetor Service Manual Download

Carter Thermoquad Carburetor Service Manual Download



Keihin CR Special Smoothbore Carburetor Owners Instruction Manual Download

Keihin CR Special Smoothbore Carburetor Troubleshooting Guide Manual Download

Keihin CVK32 Carburetor Maintenance Service Instruction Tuning Manual Download



Linkert Carburetor Carb Rebuild Repair Kit 1933 to 1966 Harley Davidson



Mikuni HS40 HS 40 Carburetor Carb Parts List and Tuning Manual

Mikuni HS40 Smoothbore HS 40 Carburetor Carb Rebuild Repair Kit

Mikuni HSR 42 45 48 Carburetor Carb Illustrated Parts List Diagram Schematic Manual

Mikuni HSR42 HSR45 HSR 42 45 Carburetor Carb Evo Twin Cam Installation Instruction Manual

Mikuni HSR42 HSR 42 Carburetor Carb Installation Manual ~ EVO Big Twin & Twin Cam

Mikuni HSR42 HSR 42 Carburetor Carb Installation Manual ~ Sportster & Buell

Mikuni HSR42 HSR 42 Carburetor Carb Rebuild Repair Kit

Mikuni HSR42 HSR45 HSR48 HSR 42 45 48 Series Carburetor Carb Tuning Manual

Mikuni HSR45 HSR 45 Carburetor Carb Rebuild Repair Kit

Mikuni HSR48 HSR 48 Carburetor Carb Rebuild Repair Kit

Mikuni PAT Carburetor Carb Upgrade Installation Instruction Manual

Mikuni RS Series Carburetor Carb Super Tuning Instruction Manual

Mikuni VM Carburetor Super Tuning Service Manual



Pekar K-68 Carburetor Disassembly Manual Dnepr Ural Download



Solex 44 PA1 Rebuild Service Instruction Manual Download

Solex 44 PAHN-3 Rebuild Service Instruction Manual Download

Solex 44 PHH Rebuild Service Instruction Manual Download

Solex Carburetor Selection & Tuning Manual Download



S&S Super E Carburetor Rebuild Kit HERE



Rivera Primo SU Eliminator Carb Kit Harley Davidson 1955 to 2006

Rivera Primo SU Eliminator II Carb Kit Harley Davidson 1955 to 2006

Rivera Primo SU Tickler Pump Carb Kit