Manual

About taper angle and FCR tuning - MJ confirmation from test run - How much does MJ influence? 2022-08-20...

Since today is Saturday,I wanted to ride on the CBX1000,but unfortunately it was about to rain. To shake or not to rain? Anything else? It was a subtle sky pattern. I ended up doing a test drive around my house while checking the weather forecast on my smartphone. So,I will be doing a test run mainly to see how the MJ looks after changing the tuning from last time.

2022-08-20

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Comparison of idle port and slow port of FCR carburetor...

I hadn't been aware of it until now,but this is a story that makes me feel like I understand the difference in air-fuel ratio between the idle port and the slow port. There was an incident where I was able to see the difference between fully closing the throttle and opening it slightly to about 1/16,so I will write about it. First of all,I would like to disclaim that I am a programmer by trade and not a motorcycle shop staff member,so please understand that I may contain incorrect information or expressions.

2022-07-25

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Comparison of FCR-jet needle cut-up. Let's take a look at the thickness of the small standard 90FXM and 90FTM....

I received the JN Jet Needle 90FXM from BITO. I have JN on hand with different tapers and different cut ups. I feel more and more like I'm buying it for experimenting rather than tuning it up.

2022-07-21

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tuning of FCR - If the small jet needle is F taper,you cannot choose the cut-up. Round up comparison...

I can't help but feel like the large is basically telling you not to use anything other than the E taper. Small has more overall numbers than large,but [E] taper still has more options. With F-taper,you cannot choose the cut-up unless you order it in units of 20 pieces.

2022-07-20

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[FCR] Jet needles should be purchased from BITO....

I usually set the FCR with [F] taper. There is a symptom where it gets richer when the throttle opening is suddenly opened to 1/2. As a countermeasure,I tried various things such as changing the MJ main jet to a smaller size,but the feeling was not good,so I will try changing the taper angle to [E] and tuning it.

2022-07-14

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Initial turning of CBX1000 FCR33 shipped by BITO. CBX1000 bikers will be happy after reading this....

BITO seems to be the shipping company for FCR in Japan,so I think the information I heard here is pretty solid.

2022-07-12

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FCR tuning - Acceleration pump adjustment - 2022-07-06...

Since I had time to touch the motorcycle,I adjusted the FCR's Acceleration pump diaphragm. Even though it is an adjustment,it is just a matter of replacing the diaphragm. FCR's acceleration pump is an obscure and incomplete device. It is an unusual device that cannot be called precision like jets.

2022-07-07

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Verifying the impact of CBX1000 PS...

This is a blog post where I tried restoring the PS of CBX1000's FCR. PS is active when idling. It works at least at rotation speeds of 1300RPM-1500RPM.It may be that after a certain level of concentration (returning the PS) there will be almost no effect.

2022-06-27

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FCR - SJ count tuning - tuning parts list available...

It's in the FCR manual. I bought and tried all of SJ's #35-#55. Roughly speaking,my vague conclusion is that the appropriate values for the return of the PS and AS screws will change. AS,SJ,and PS have different responsibilities.

2022-06-15

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AS Uotani SP2-Dial turning...

My CBX1000 is equipped with AS Uotani SP2. The reason is not to strengthen the ignition system,but rather to avoid unnecessary trouble. Of course,it is also wonderful as an aftermarket part.

2022-06-10

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