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FCR tuning - AS air screw adjustment - 2022-08-03...

I wanted to eat curry for lunch,so I went for a light FCR test run. With my ability,I can't decide on a good screw position in one go,so I just do test runs and try different screw positions from rich to lean.

2022-08-03

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Photos of CBX1000 cowl specifications are posted....

Even if it is not a CBX1000 cowl specification,some parts may be helpful for owners who want to install a frame-mounted cowl on a naked specification motorcycle. This is a duplicate of the previous article,but the content posted a while after installation and the post immediately after installation are slightly different.

2022-08-01

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FCR tuning - screw adjustment and AS Uotani SP2 dial tuning - 2022-07-29...

I looked at the cold startability of the engine and tried adjusting AS and PS. I had already decided on the general tuning the other day,so I didn't have to spend any particular time on it,so it was more of a confirmation process. I feel that it is better to open the PS for starting performance. I tried tightening and opening it,but in the end I left it at the default tuning and moved the idle stop screw a little higher.

2022-07-29

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FCR tuning - AS and PS adjustment during test run - 2022-07-28...

If you try to improve the starting performance,the PS will tend to open. Since it is a racing cab,you may not need to worry too much. Either way,I currently prefer a richer shade,so I'll see how it goes tomorrow morning. I'm thinking about various things,such as tightening the PS a little more and raising the stop screw a little.

2022-07-28

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FCR - JN clip stage number change - 2nd time today - 2022-07-27...

The goal of the tuning was to improve the adjustment range for the pilot screw and air screw, as it seemed to be nearing its limits. I responded by increasing the size of the slow jet (SJ). It seemed to be working fine as it was, but I prefer tuning it richer. After changing the SJ, I re-synchronized and checked the throttle cable tension. Since there haven’t been significant changes since the last adjustment, I was able to complete it quickly.

2022-07-27

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FCR - Test run - Mesh jacket is pretty good - 2022-07-27...

It's a cool mesh jacket when you look at it alone,but I feel like it doesn't go well with the CBX1000. It may be suitable for bright tricolor replicas such as NSR. Since I have already purchased it,I will be spending the summer with a mesh jacket for the time being.

2022-07-27

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FCR tuning - PS pilot screw changes - 2022-07-25...

The other day,I found out the scope of responsibility for PS Pilot Screw! That's what I was feeling,so I went for a test drive and checked the air-fuel ratio while turning the PS. About the throttle opening - It's around 15 when fully closed and around 12.5 when it's around 1/16-1/8. Is around ①14 good when fully closed and idling? ②Is around 12.5 good? That's the idea.

2022-07-26

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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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In the case of a racing carburetor such as FCR,can it be run in the rain with a Velocity Stack specification? Should I do it?...

I hate driving in the rain. Working motorcycles and commuting motorcycles,including Cubs. Even large motorcycles shipped from the manufacturer are driven in the rain. Such motorcycles do not have any problems. After thinking about it for a while,I realized something.

2022-07-25

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FCR tuning - Use BITO's default jet needle. I did a test drive with a higher cut-off....

I purchased a slightly special needle,90FXM,from BITO. What's special about it is that it's a count that doesn't see many upswings. In fact,it is not in the standard stock lineup. This is the needle attached to the current initial turning of BITO's CBX1000 FCR.

2022-07-25

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