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

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

カテゴリ

タグ

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

カテゴリ

タグ

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

カテゴリ

タグ

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

カテゴリ

タグ

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

カテゴリ

タグ

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

カテゴリ

タグ

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

カテゴリ

タグ

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

カテゴリ

タグ

CBX1000 FCR tuning jet needle replacement. Impressions from a test run after changing the taper angle...

When I started tuning up the FCR,there were two items that I thought I would avoid touching because I would get stuck in a swamp. Tapered angle and cut up. I thought it would be nice if I could just touch it lightly and see if it was in good or bad condition,but the more I touched it,the more I became concerned and couldn't help it,so I decided to try changing the taper angle. .

2022.07.18

カテゴリ

タグ

[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

カテゴリ

タグ