SJ

Tags for articles that include FCR settings, especially SJ slow jets. This is a jet that mainly controls fuel supply at low throttle openings. For the SJ area, detailed adjustments are made separately using the AS air screw and PS pilot screw. Depending on the size of the SJ, if the return range of the screw does not correspond to the appropriate position, replace it.

FCR

FCR Tuning - Tuning throttle opening from 1/16 to 1/8 - 22/11/06...

Regarding the current FCR tuning of CBX, I was concerned about the lower throttle opening. It's not a good idea to get caught up in the air-fuel ratio meter, but a partial reading of 10.5 is around throttle opening of 1/16 to 1/8. It is unclear whether this condition is good or bad.
       
カテゴリCBXFCR
タグASCBXFCRFCR-BeginnersJNPSSJ
FCR

FCR Tuning - Slow Jet Change - 22/10/24...

When I did a test run the other day, I was a little concerned about the low throttle opening. The slow jet was set to 42 based on the time of BITO shipment. Perhaps it was because of the delayed discharge timing of the accelerator pump or because of the season, there were parts where the power was weak when starting from a fully closed throttle, and the air-fuel ratio was briefly lean, so it wasn't very pleasant. So I changed the slow jet from 42 to 48.
       
カテゴリCBXFCR
タグASCBXFCRFCR-BeginnersPSSJ
FCR

FCR-PS Isn't it too rich? How to decide between pilot screw and slow jet...

I've been worried about something ever since I started using FCR. This is how to return the pilot screw. The other day, when I was synchronizing, I noticed something, so I'll write it down. There are few people who specifically write about how to decide on slow jets and pilot screws.
       
カテゴリCBXFCRManual
タグCBXColumnFCRFCR-BeginnersPSSJ
FCR

FCR Tuning - Changed SJ from 38 to 40. PS pilot screw adjustment-22/09/28...

① Set the AS to a slightly richer position. ② Set the PS back by 1.00 minutes. ③ Open the PS for about 15 minutes at a time. ④ Open the PS to a point where it is easy to maintain idling and it is finished. In the case of CBX, I have never had a problem with driving because the PS was opened too much and it was too rich, but I start from a lean PS and then richen it.
       
カテゴリCBXFCR
タグASCBXFCRFCR-BeginnersPSSJ
FCR

FCR tuning - Change and synchronize SJ and MJ 22/09/27...

About MJ main jet. When I looked at the air-fuel ratio meter, I noticed that it would be better if I made it even slightly lighter. It may not make much sense, but I changed MJ by one step from 128 to 125. This is the season when fuel becomes richer as we approach winter. There is no problem even if you shake it a little thin.
       
カテゴリCBXFCRMaintenance
タグAScabtuningCBXFCRFCR-BeginnersMJPSSJVacuumgauge
CBX

About FCR-PS. Idle port, slow port and air-fuel ratio at idling...

The other day, when I was carrying around a Carburetor Pilot Screw Adjustment Tool, a certain mass touring group asked me, ``What is this?'' ” I was bombarded with questions in turn. I have come to my own conclusions and done things that I had doubts about since I started tuning up FCR, so I will write about them historically.
       
カテゴリCBXFCR
タグASCBXColumnFCRFCR-BeginnersJNPSSJ
FCR

FCR-Test run-Mesh jacket is pretty good22/07/27...

It's a cool mesh jacket when you look at it alone, but I feel like it doesn't go well with the CBX. 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.
       
カテゴリCBXFCR
タグASCBXFCRFCR-BeginnersPSSJ
FCR

FCR turning-all changes-22/07/09...

The theory of FCR turning is AB testing, one step forward, two steps back! After about a month of trying various things, I decided to completely change the turning. Rather than ignoring the theory, this is the first step in tuning it up. I've tried a lot of things and have a good history, so I changed everything in one go and started over.
       
カテゴリCBXFCR
タグAccelerationPumpASAS-Uotani-SP2cabtuningCBXCBX400FCustomFCRFCR-BeginnersJNMJPSSJ
FCR

FCR-tuning-MJ and JN influence-22/07/08...

In the previous blogs, I was a little worried because when I started suddenly, there was a bump at about 1/2 throttle opening. The cause was the combination of the MJ main jet and JN slow jet. The reason for the judgment was that if the MJ was extremely lowered, it would not go away, but there would be a change.
       
カテゴリCBXFCR
タグAccelerationPumpASCBXFCRFCR-BeginnersJNMJSJ
FCR

FCR-tuning SJ exchange 22/07/03...

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.
       
カテゴリCBXFCRMaintenance
タグCBXFCRFCR-BeginnersSJ