FCR Tuning – Adjusting the Air Screw After Carburetor Synchronization – 2022-10-01

FCR Tuning – Adjusting the Air Screw After Carburetor Synchronization – 2022-10-01

Tomorrow I'm planning to participate in a touring trip that involves a lot of motorcycles.
Two months ago, I was unable to attend the Saturday Night meeting due to lack of maintenance.
The cause was a defective headlight. It was an issue that could easily be resolved by doing maintenance or a test run the day before. I am seriously reflecting on this. So, rather than tearing apart the FCR in a flashy manner, I've continued to test drive the SJ after making changes, which I've been slowly making this week.
If anything, the main purpose was to see the startability when cold.
By touching the CBX1000 or taking a test drive, you can find any problems in advance.
The most common causes of trouble are couplers coming off, bolts and nuts coming loose, or low air pressure.
There are a variety of reasons, such as running out of gas, but most of the time you will notice it after a test drive.
Even if the battery is weak, you can charge it in advance, and if the battery is at the end of its lifespan, it won't suddenly come back.
There should have been signs by now.
The important thing is that something that was originally working without any trouble rarely suddenly breaks down.
A more serious cause of trouble is a motorcycle that was working fine but stopped working after being disassembled. When this happens, you end up damaging the motorcycle yourself rather than performing maintenance.
It is best to decide in advance which parts you will need to maintain before disassembling the motorcycle.
Even if your motorcycle stops working due to a problem, recovery will be quick.
The really worst case scenario is where you didn't realize you had damaged your motorcycle.
Even if you are a veteran, there are probably many who have created such cases themselves in the past. I also write like this, but I tend to mess things up a lot.
In all cases, when I noticed something and fixed it and looked back on it, it was completely my fault, or I cut corners because I could have predicted it, or I neglected to check.
Now, this is a long introduction, but I will briefly outline today's work.

Today’s work details

I checked synchronization by touching it only with the throttle stop screw.
I put the AS air screw back in for 5 minutes.
I opened and closed the PS pilot screw for 15 minutes and checked the changes.
There was a change in the startability of the engine, but as a result, I haven't made any changes since before I touched it.
I did a test run and installed the Velocity Stack and Foam Air Filter Sock.
I applied oil to the Foam Air Filter Sock.
Adjustments were made to give priority to return strength rather than throttle wire play.
I refueled.
I checked the tire pressure.
Corsa Road Classic in Corsa Corta with 2.0kpa front and 2.3kpa rear.
I checked the front fork air pressure.
It is 0.6kpa. I was disappointed that the front fork oil leaked a little.
I tightened the upper cowl mounting bolts. I checked and adjusted the side mirror angle.
I believe that repeating screws and synchronization several times will improve accuracy. By repeating the number of times gradually, the time and place to touch will decrease.
As for FCR, as a result, I just set AS back by 5 minutes, so it's almost like I didn't do anything.
I haven't touched it for an hour.
I feel like I have completed the FCR tuning work by completing the tasks that I had not done during the work, such as installing the Velocity Stack and installing the Foam Air Filter Sock.
Please refrain from any flashy disassembly if you are planning on touring.
When it becomes impossible to run, it's such a shame that all I can do is laugh.

For FCR beginners – read the tuning manual in advance and prepare. Keep a work history

Please consider your purpose before touching FCR.
Think about where and how you would change the results. I will write down important ideas for FCR tuning.
This is to compare whether it has improved or worsened compared to the previous tuning.
First, check the range of influence in the tuning manual,
What should I touch today? How far should the disassembly go? Just thinking about these things will improve work efficiency and tuning accuracy. I basically record my tuning history on Google Spread from my smartphone. I don't even remember what yesterday's tuning was about.
Keeping a history is very important.

FCR Tuning – Adjusting the Air Screw After Carburetor Synchronization – 2022-10-01【summary】

This time, rather than tuning, it was more like a test run and some light maintenance. It's not like I changed anything in particular.
Rather, it may be more accurate to call it maintenance that includes test runs.
We have resolved the issue where the AS air screw was easily accessible without installing a Velocity Stack or Foam Air Filter Sock. In short, this phase of tuning is over.
I did it in small chunks over a week, but if it includes checking the engine's cold start, you can tune it slowly over different days. The engine warms up while I'm running it and checking on it, so it's difficult to check in detail over and over again.
These days, I enjoy running things, but I also really enjoy maintaining and cleaning them.
It's a joy to touch a motorcycle in unbroken condition.
I hope you all enjoy your DIY life.
See you again!

*Work photos are attached at the bottom.

CBX1000 FCR tuning work photo

I did a lot of things like washing the car and disassembling it a bit. I also packed ETC and fuel because it would be troublesome if I had trouble the next day. It was a lot of fun to do maintenance on a sunny Saturday.