Tools required for CBX FCR tuning

FCR-tuning tools FCR
CBXFCRMaintenanceManual
This article can be read in about 11 minutes.

Tools required for CBX FCR tuning

Racing carburetors such as FCR are not finished once installed.
You can start the FCR after installing it.
Tuning is the starting line for FCR.
I will introduce the tools used for FCR tuning of CBX.
It should also serve as a reference for other motorcycle FCR users.
Tuning is the main thing.
If you want to completely disassemble it, you will need a separate tool.
This is an introduction to tools for tuning.
Most people who do even light DIY work on motorcycles will have most of the tools on hand.
There may be tools of different sizes that you will need to purchase.
I will write an explanation.
Let's start!

Tools required for FCR tuning

[Range of regular use]
・3mm hex wrench (long and ball joint)
This is a commonly used size.

・4mm hex wrench (long and ball joint)
This is the size used to fix funnels and jet needles. for funnel
Preparing a short circuit separately will improve work efficiency.

・Long Phillips screwdriver
This is the size used to fix the intake manifold. If you don't choose a long one, use No. 3 and No. 4 carburetors.
It won't arrive.

・Size for flat head screwdriver slow jet
You need to choose the shape of the tip rather than the length.

・Size for flathead screwdriver synchronization
You need to choose the shape of the tip rather than the length.

・Size for flat head screwdriver air screw
You need to choose the shape and length.

・Pliers
Necessary for adjusting the discharge timing of the acceleration pump.

・Radio pliers
It is convenient to take out the jet needle and attach/detach the throttle wire.
Necessary for attaching and detaching the jet needle clip. It is not necessary to attach or detach the JN clip.
Although it may not be necessary, the risk of losing the clip increases if you attach or detach it without tools.

・14mm spanner
Remove the chamber drain bolt.

・10mm spanner
Used for attaching and detaching the throttle wire.

・8mm spanner
Used for attaching and detaching the throttle wire.

[Special size]
・7mm spanner
Used only for adjusting the synchronization nut. This size is required.

・6mm box
Necessary for attaching and detaching the main jet.

【Special tool】
・Carburetor Pilot Screw Adjusting Tool
You will need a cab driver of a size that can be used for No. 3 and No. 4. In the case of CBX, it will interfere with the drain bolt at the bottom of the chamber. I use it by cutting the side of the cab driver.

・Float level gauge
Used for oil level adjustment. It's OK without it.
It is difficult for me to measure height without using it.
You can also make your own jig and use it instead. Since it is not a highly accurate measurement method,
This is a level measurement method for those who are interested.

・6 vacuum gauges required
This is explained in a separate section.

・Cab synchro tester
A simple vacuum gauge that is used by applying it to the funnel.

・Sickness gauge
Used to adjust the acceleration pump discharge timing. Although it is necessary to clearly state the size of the pawl adjustment as part of tuning, it is difficult to imagine that highly accurate adjustment can be made with this structure.

・Sub tank
A tank for fuel supply. Used for cab synchronization.

For FCR Beginners – Necessary Tools

Please prepare all tools except for the special tools listed above.
Generally, it is not necessary except for FCR disassembly and synchronization.
You also have the option of leaving the syncing to a professional.
However, if you become a beginner and start repeatedly putting on and taking off the FCR, you will need to synchronize frequently. It is better to find your own simple method or to be able to synchronize yourself.
When it comes to synchronization with CBX, there is a slight hurdle in terms of arranging the tools.
How far can you go on your own? How far can I do it myself? Please keep this in mind when preparing your tools.
Tuning is not possible without tools.
Gathering the tools is the first step in tuning the FCR.

About vacuum gauge

The FCR for CBX only has a negative pressure outlet nipple on the standard carburetor.
Some processing may be required. I use a spigot with a negative pressure extraction nipple added. There are four vacuum gauges commonly sold.
Since the CBX is a 6-cylinder, you will need to change the connections and make adjustments, buy 2 sets of 4, or use a super high-quality vacuum gauge for 6-cylinders. Also, it is very difficult to connect and use 4 pieces.
I noticed this after synchronizing with 6 devices, but replacing 4 devices and synchronizing is less accurate and takes more time.
At least the CBX that can be used with a vacuum gauge is in a state where some processing has been done,
It is better to make the most of the processed functions. The carb synchro tester, which measures by applying it to the funnel, is also bad in terms of working speed. For example, it is not suitable for private users who are synchronized deep in the mountains. I have to synchronize it while using the fan in the garage.

photo of tools

I sometimes put on and take off the FCR while traveling, so I try to only carry the necessary items with me.

Tools required for CBX FCR tuning【summary】

I enjoy tuning for knowledge.
FCR users don't need to tune like a pro.
However, it is necessary to be interested and touch it even just a little bit.
In many cases, you will initially ask a professional to install it for you.
Please try to get at least a memo for the initial tuning.
It will definitely come in handy when you touch it yourself.
There are roughly three uses for installing FCR.
① There is no alternative to the carburetor.
② Performance improvement
③Dress up
Regarding ③ of the above three points, if you don't touch on FCR even a little, it will be dressed down.
It is impossible to touch all of FCR at once.
I want more people to come into contact with FCR through my blog.
I hope everyone has a fun FCR life, including tuning and driving.
See you again!
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