"jet needle"

FCR

FCR Tuning - Should the Slow Jet Be Changed According to the Season?...

Tuning the FCR requires adjustments based on the weight of air and fuel. As the temperature drops, the density of the air increases, making the air heavier. In response, it is necessary to either increase the weight (amount) of the fuel or reduce the amount of air.
2023-12-21
       
カテゴリCBX1000FCR
タグASCBX1000ColumnFCRFCR-BeginnersJNPSSJ
FCR

For FCR Beginners - Don’t use the red Velocity Stack on the street as it is!...

When you purchase an FCR, it comes with a red Velocity Stack. It’s a 30mm red plastic Velocity Stack. The Velocity Stack of the FCR can be considered the 'exhaust' on the intake side. It is an essential part for smoothing the airflow.
2023-12-11
       
カテゴリCBX1000FCR
タグCBX1000ColumnFCRFCR-BeginnersRamair
FCR

FCR Tuning - When changing the straight diameter of the jet needle, also adjust the clip position....

When you change the straight diameter of the jet needle, you may need to change the clip position as well, or else the performance can become quite poor. It’s difficult to specify exactly how many steps you should change the straight diameter before adjusting the clip position, but it seems reasonable to think that changing the straight diameter by about five steps would correspond to a change of approximately one clip position.
2023-12-07
       
カテゴリCBX1000FCR
タグCBX1000ColumnFCRFCR-BeginnersJN
FCR

FCR Tuning - Changing Slow Jets, Adjusting Air Screw and Pilot Screw - 2023-11-09...

It’s important to make adjustments to the FCR as soon as you notice something off. I’m considering adjusting the throttle low opening screw range and the air-fuel ratio at wide open throttle to be about 1.0 richer. I changed the Slow Jets (SJ) and Main Jets (MJ). This year, I decided not to change the SJ.
2023-11-11
       
カテゴリCBX1000FCR
タグASCBX1000FCRFCR-BeginnersMJPSSJ
FCR

FCR Tuning - If the pilot screw is set to 1.00 turns out, it may not be adjusted sufficiently....

In FCR tuning, the initial values for the screws are typically set to an air screw (AS) of 1.00 and a pilot screw (PS) of 1.00, as stated in the tuning manual. This content suggests that there might be an additional level of power available even after achieving what seems like the best tuning.
2023-11-10
       
カテゴリCBX1000FCR
タグASCBX1000FCRFCR-BeginnersPS
FCR

FCR Tuning - Regularly resetting the air screw and pilot screw can improve performance....

The FCR air screw and pilot screw are parts that can be adjusted continuously. In contrast, the slow jet and main jet needle can only be adjusted with specific sizes. The air screw is easily accessible once you remove the filter or velocity stack, making it straightforward to observe changes.
2023-10-15
       
カテゴリCBX1000FCR
タグASCBX1000ColumnFCRFCR-Beginnerssynchronization
FCR

FCR Tuning - To what extent does the main jet affect the throttle opening range? - 2023-09-19...

I'm describing the effects of changing the main jet, focusing on how it influences throttle positions other than full throttle. After changing the main jet, I went for a test run. My assessment is centered around the changes observed from around half-throttle to three-quarters throttle rather than focusing solely on the full throttle range.
2023-09-21
       
カテゴリCBX1000FCR
タグCBX1000ColumnECFCRFCR-BeginnersJNMJ
FCR

FCR Tuning - Adjusting Accelerator Pump Discharge Timing and Straight - 2023-09-12...

I’m framing this as fine-tuning rather than tuning in the strictest sense. The tuning of the FCR is the result of repeated A/B testing. It’s a process of searching for jets that improve performance, and then finding even better jets from those improvements.
2023-09-13
       
カテゴリCBX1000FCR
タグAccelerationPumpCBX1000ColumnFCRFCR-BeginnersJN
FCR

The throttle opening and throttle valve opening of the FCR carburetor are not directly proportional....

Even when the throttle is opened to 1/2 on an FCR, the throttle valve on the FCR does not open to 1/2. This is not specifically mentioned in the FCR tuning manual. Knowing this might change your perspective on the operation of the FCR throttle. At 1/2 throttle opening, the throttle valve is typically open only about 1/4.
2023-09-12
       
カテゴリCBX1000FCRManual
タグCBX1000ColumnFCRFCR-Beginners
FCR

FCR Tuning - Testing 6 Variations of Accelerator Pump Diaphragm - 2023-08-22...

One of the highlights of FCR carburetors is the accelerator pump. This time, instead of making just minor adjustments, I performed tuning with all the diaphragms I have on the same day. The accelerator pump diaphragms tested were Standard, KLX250, and KLX400, with discharge timings of 1.0mm and 0.5mm, resulting in a total of 6 different patterns.
2023-08-23
       
カテゴリCBX1000FCR
タグAccelerationPumpCBX1000ColumnFCRFCR-Beginners
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