FCR-FCR tuning in general. 6 cylinder tuning, AS, JN, MJ replacement, etc.

Is a quick turn throttle necessary for FCR?...

This is a story that always comes up when converting an old motorcycle into a racing carburetor. Since racing carburetors are intended for full-throttle driving on circuits,it is best to install a quick turn throttle. Depending on the purpose of use,there may be exceptional reasons not to install quick turn throttle,although it varies case by case.

2022-07-05

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FCR tuning - Lean slow jet - Changed from 48 to 40 - 2022-07-03...

This article is just about replacing FCR's SJ slow jet. Due to rain in the forecast,I decided not to do a test run and just replaced the SJ. SJ-48→SJ-40Actually,42 is probably better since it is the default value,but I want to verify the difference myself,so I replaced it with SJ,which is the lowest value than 42.

2022-07-04

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FCR-tuning - With Boko - 2022-07-02...

While cruising,when I suddenly open the throttle from 1/8 to 1/4 or 1/2,I have a problem where it hits me,or the air-fuel ratio drops to 10.1. I couldn't adjust the PS pilot screw while the engine was running,so I tried various things.

2022-07-04

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FCR tuning - AS Adjustment - 2022-06-25...

CBX1000 FCR turning. I adjusted the AS air screw and the PS pilot screw. As I wrote in another article,my current opinion is that there are no surprising changes in PS and AS for each cylinder in the CBX1000.

2022-06-27

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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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pilot screw adjusting tool processing...

pilot screw adjusting tool. One of the things I always worry about when using a CBX1000 is how to turn the pilot screw. I've tried about 3 pilot screw adjusting tool so far,but I haven't been able to find the perfect one.

2022-06-27

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FCR-Synchronous screw nut limits and SEP bearing guide...

The article says there are limits,but the article is not saying that there are limits to synchronization,but rather that if you synchronize several times,you will reach the limit of the adjustment range,so you will need to reset it. This will be a blog post. This is a story that people who don't have anything to do don't have anything to do,so please read it quickly.

2022-06-24

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FCR Carburetor - The effects of the balance pipe...

This is going to be a bit of a rough article. I've been wanting to check the operation with and without a balance pipe for a while now,so I'd like to post about that. I will write the results first. [No change] The verification method is sloppy,and I don't know if the thickness of the balance pipe is the appropriate size in the first place.

2022-06-24

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FCR tuning - MJ main jet change - 2022-06-23...

Recently,the situation has become such that instead of tuning up FCR when I have time,I make time to set up FCR. I have to either calm down a little or get over it to the point where it doesn't bother me. Although it is called a main jet change,MJ and JN were changed.

2022-06-24

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FCR tuning - MJ or JN - 2022-06-20...

I couldn't help but worry about it,so I decided to leave work early in the morning and finish by noon to set up. I have no complaints about the turning,but what would happen if I changed them? I want to know. This time,MJ was changed and JN was changed accordingly.

2022-06-21

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