Hello, What it the small air box attached behind the FAN? I know the hose is connected to the carburetor but what is its purpose ? If im not mistaken there are 4 air hose going from?to? the carburetor The big ones are going to 2 small "sub air filter " box and i dont know where the small ones are going to. Are they here to vent the float chamber and the vacuum chamber to atmospheric pressure ? If yes which one is responsible for which part of the carburetor
Hello, There was already a discussion about that 5 years ago under the "JC027 XL600V Carburettor inspection and cleaning part 2" video. That time I made a quick qoogling and found this: "Located on the side of the carburetor, the air cut-off valve prevents lean fuel mixture (backfire) when decelerating Temporarily closes the pilot jet airway to provide a richer mix as the throttle closes"
Then one guy wrote this (transleted by DeepL.com): "That diaphragm is the accelerator pump. You suddenly apply the gas. The vacuum in the pump ports increases. That sudden vacuum pushes this diaphragm, which injects extra gasoline into the pump ports. You can see a jet. Matchstick thick liquid column. Butterfly valve is fully open at this time. Engine starts to speed up, gasoline pours into the engine. After this extra vacuum is reduced the diaphragm will push less and less extra spray down the throat. The balance is set. You accelerated from 80 to 120. High speed " idle " comes on at 120 and you're rolling. You don't pull the throttle. Diaphragm not working. You pull slowly, there's not much acceleration demand, so the accelerator pump doesn't work. The RPM also rise slowly. This diaphragm makes the average fuel consumption go up from 5 to 6 litres per 100 km." Deepl is suprisingly good but not fully accurate. So I have made some corrections. If I remember well that small airbox connected to this one. I hope this helps.
@@ST-di6nl Hey thanks for the answer. Yeah very helpful. It is difficult to find advanced knowledge information about this carburetor nowadays. You only get basic maintenance information, or replacement parts, but not how actually this carburetor works, all the systems and routing etc. Thanks your channel is very good for the XL600V, lot of camera views, good resource
Hello,
What it the small air box attached behind the FAN?
I know the hose is connected to the carburetor but what is its purpose ?
If im not mistaken there are 4 air hose going from?to? the carburetor
The big ones are going to 2 small "sub air filter " box
and i dont know where the small ones are going to.
Are they here to vent the float chamber and the vacuum chamber to atmospheric pressure ?
If yes which one is responsible for which part of the carburetor
Hello,
There was already a discussion about that 5 years ago under the "JC027 XL600V Carburettor inspection and cleaning part 2" video.
That time I made a quick qoogling and found this: "Located on the side of the carburetor, the air cut-off valve prevents lean fuel mixture (backfire) when decelerating
Temporarily closes the pilot jet airway to provide a richer mix as the throttle closes"
Then one guy wrote this (transleted by DeepL.com): "That diaphragm is the accelerator pump. You suddenly apply the gas. The vacuum in the pump ports increases. That sudden vacuum pushes this diaphragm, which injects extra gasoline into the pump ports. You can see a jet. Matchstick thick liquid column. Butterfly valve is fully open at this time. Engine starts to speed up, gasoline pours into the engine. After this extra vacuum is reduced the diaphragm will push less and less extra spray down the throat. The balance is set. You accelerated from 80 to 120. High speed " idle " comes on at 120 and you're rolling. You don't pull the throttle. Diaphragm not working. You pull slowly, there's not much acceleration demand, so the accelerator pump doesn't work. The RPM also rise slowly. This diaphragm makes the average fuel consumption go up from 5 to 6 litres per 100 km."
Deepl is suprisingly good but not fully accurate. So I have made some corrections.
If I remember well that small airbox connected to this one. I hope this helps.
@@ST-di6nl Hey thanks for the answer.
Yeah very helpful.
It is difficult to find advanced knowledge information about this carburetor nowadays.
You only get basic maintenance information, or replacement parts, but not how actually this carburetor works, all the systems and routing etc.
Thanks your channel is very good for the XL600V, lot of camera views, good resource