FCR Tuning – Synchronizing six FCRs is the best part of tuning

FCR tuning-vacuum gauge FCR
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FCR Tuning – Synchronizing six FCRs is the best part of tuning

Carburetor synchronization is not limited to the CBX1000, but it is one of the joys of tuning an FCR.
It is one of the things that comes to mind when you think about tuning.
This blog post is not mainly about how to synchronize the CBX1000.
I will write a column about the importance of synchronization.
I have written about how to synchronize in a previous article.

Please search for "synchronization" in the search box on the site.

Although I ride motorcycles for myself, I always interact with others.
At those times, the topic of synchronization may come up.
It is not my main purpose to tell others that I can synchronize, but
it may be something that I only realize when someone else asks me about it.
I only realized this when other riders asked me about synchronization, and I thought,
"I'm glad I synchronized it myself."
Either way, if you are working with a shop, you can leave the synchronization to the shop.
If you want to tinker with the FCR yourself, you won't be able to proceed unless you can synchronize it yourself.
It's fine if you don't get it perfect, as long as you get it roughly aligned using a taper gauge or by eye.
It's fine if the synchronization isn't perfect, as long as you get it roughly aligned.
My teacher who taught me about FCRs told me to always keep an eye on it.
I check it frequently.
In particular, with FCRs that have multiple two-pronged throttle type reference carburetors, it is essential to check the synchronization, even if just by touching the throttle stop screw.
The negative pressure changes slightly every time you touch the FCR.
If you are aiming for perfect synchronization, you will need to check it every time you work.

Is it difficult to sync the CBX1000’s FCR?

I've only ever worked with a CBX1000, so I don't know if it's difficult, but compared to a 4-cylinder, it's more work than difficult, which would be more accurate to say.
Another thing is that I don't know anyone around me who has synchronized a CBX1000, so it's hard to get direct information, which is another factor that makes amateur DIYers anxious.
To put it simply, it's a racing carburetor, so it's easy to work with.
It's not difficult.
If you know how to do the work and have all the tools, it's an easy job.

Benefits of synchronizing a multi-cylinder motorcycle

There are functional benefits. I'm a little skeptical about the functional difference between a "perfect" state and a "not bad" state.
The biggest benefit is that it feels good for your mental health.
This is the case for amateurs tuning motorcycles as a hobby.
It's a shame for a hobby if it's not synchronized.
If it's a hobby, you can spend more time on it.
People whose hobby is motorcycles and people whose hobby is tuning FCRs have different tastes.
I'm the latter, so when it comes to synchronization, I feel unsatisfied if I don't sync it up frequently.
I sometimes put it off due to time constraints, but having the synchronization in a state where I can do it myself whenever I want is helpful in terms of mental health.

The moment I thought I could sync

It started right after I started calibrating the needles with the multi-vacuum gauge.
I was shocked to find that the needles were misaligned when I bought the brand new multi-vacuum gauge.
What was even more disappointing was that I had been working hard to synchronize with the needles still misaligned.
I kept thinking something was wrong as I synchronized.
As for my CBX1000, here are some points to pay attention to when synchronizing.
・Throttle wire tension
・Calibration of each vacuum gauge
・Return when racing

As a result, the return when racing should drop sharply.
It depends on the idling height, FCR condition, and tuning at low throttle opening, so there are multiple factors involved.
The purpose is not to synchronize, but to get results from synchronizing.

FCR for Beginners – Perfect Synchronization Doesn’t Have to Be Perfect

Carburetor synchronization doesn't have to be perfect, but a reasonable degree is fine.
In fact, you can think of it as being fine as long as the motorcycle isn't running poorly.
However, unlike tuning, synchronization has a clear goal.
The needles on the gauge you have should be perfectly aligned.
You can set your own goals. When you become a professional, the goals you set for yourself are highly accurate.
I think the difference between professionals and amateurs is the accuracy of the goal and the position you decide.
Even if you think you've failed with the synchronization, you can physically align the throttle valve height
and it will run smoothly.
Synchronizing the FCR is a step towards moving beyond being a beginner.
If you're interested, we encourage you to give it a try.

FCR Tuning – Synchronizing six FCRs is the best part of tuning【summary】

When tuning the FCR, whether you are riding a motorcycle with a properly synchronized carburetor is one of the deciding factors in whether you have done the tuning properly or not.
Whether you can perform the synchronization properly will also boost your self-confidence.
It will also improve your attitude towards engine condition and maintenance.
You may talk to riders at roadside stations and other places who act as well-meaning critics.
You may be disappointed when they point out that the carburetor is not synchronized.
There is no harm in trying to synchronize your bike.
We encourage you to try synchronizing your FCR too.
You will discover something new about motorcycling.
See you again!

CBX1000 Photo Gallery

Here are some photos of the multi-vacuum gauge from previous blog posts.
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