Keihin Carburetor

Keihin Carburetor General Description (DVD: C300EXC01D)

This DVD applies to all Motorcycles and ATVs with Keihin Carburetors

The procedure is demonstrated on a 2 stroke motorcycle and a 4 stroke motorcycle so you will only need to purchase one DVD to cover any bike or ATV you may purchase. The DVD applies to FCR Keihin Carburetor. It does not directly apply to CV (constant velocity) carburetors.

Tuning a carburetor can be tricky. Incorrect carburetor settings could result in poor performance or a seized engine ($$$). There are numerous main jet sizes, pilot jet sizes and needles to choose from. There is also an air screw or fuel screw, a float height and an idle screw to adjust. We’ll show you how these components interact so you can tune your carburetor for your temperature and altitude.

Savings estimate
Procedure	LABOR cost per occurrence	Estimated occurrences per year	Estimated time it will take to do the procedure after watching the video	Video cost	3 year savings
Carburetor adjust	$45.00	3	1 hour	$24.95	$380.05

The video begins with a bike that won’t start and walks you step-by-step through the process of tuning the carburetor. The certified mechanic makes incremental changes that won’t jeopardize the life of the engine. After each modification is made on the 2 stroke, we’ll show you what the exhaust smoke looks like and the mechanic will describe why he’s making the next modification. You can see each part through disassembly and reassembly. On the 4 stroke, the mechanic will show how the bike runs in a lean condition and describe how it would run if it were running rich. No steps are skipped.

This DVD is designed for those who prefer watching a demonstration rather than reading a manual or fumbling your way through the process. After watching our detailed step-by-step video, you should be able to tune your carburetor.

We’ll show you how to do this in your garage without any special tools. The mechanic speaks slowly so you can watch the video and take notes if you like. Unlike most maintenance videos that focus on the actor, this video is shot at close range so you can see the details.

Note: The video was filmed on a FCR (Flat Side CR) type of carburetor. The FCR and CV (Constant Velocity) carburetors operate differently. Customers with CV type carburetors have tuned their carb successfully after watching the DVD. If you have moderate mechanical experience you shouldn't have any problems. If you are unsure which type you have, most carburetors are stamped with "FCR" or "CV" near the bottom of the carburetor.

What you’ll get:
A detailed 2 and 4 Stroke video performed by a certified motorcycle mechanic on a 2001 KTM 300 EXC and a 2002 Yamaha WR426. The DVD starts with a bike that's not running. The Technician walks you through the steps to get the bike running and then fine tunes the carburetor.

What you'll need:
Tools and Supplies

This DVD contains the following:

A DVD sectioned into chapters so you can find information quickly. You’ll learn how the carburetor operates and how to:
Initial Setup
Check The Float
2 Stroke Jets
2 Stroke Testing
2 Stroke Air Screw
Adjust Idle (All Bikes)
Plug Check (All Bikes)
4 Stroke Jets
4 Stroke Fuel Screw
4 Stroke Needle
4 Stroke Runs Rich
Altitude and Temperature Modification

Clips from the DVD:

carb carb

What you don’t get:

Specific torque settings.
Consult your service manual since this procedure applies to many motorcycles and your bike may have already been modified.

Top reasons to use our DVDs:

People learn faster from and instructional DVD than from reading a repair manual.
You’ll be more confident of doing the task after watching a professional than you would be after reading the service / repair manual.
Service / repair manuals don’t show you how to make your own tools. Some of our instructional DVD’s show you how to make inexpensive tools.
Service / repair manuals don’t go into the same detail as found in the DVD.
The DVD applies to more types of bikes than the service / repair manual covers.
You can preview the level of effort required to do the job before you start. This is difficult to assess with the service / repair manual.
The service / repair manual generally shows one way to do the task. When applicable, the DVD will show several ways.
Sometimes the service / repair manual recommends removing parts (Radiators / carburetors) that aren’t necessary to be removed to do the procedure correctly.
The service / repair manual doesn’t describe how the parts operate. The DVD describes how some parts operate.
We recommend using the motorcycle repair or service manual as a reference for specifications.
However, there’s nothing better than watching someone do the procedure.
The repair manual just isn’t as good as a video when it comes to showing and describing a process.