Pollmann
1982 XS400
Hey Guys,
In between my carbs and my engine there are these two holes in the attachments. One just after each carb (they are labelled as number 6 on the attached picture). On my xs400, one of them is capped off and the other has a hose coming out of it. The end of the hose looks like it used to be attached to something but I'm puzzled why one would run somewhere and the other is capped, shouldn't both carbs be running identically? The hose feels to be a vaccuum of some sort, it is sucking in air when the bike is running, but the bike runs pretty similar with it open and when i plug it. I've checked my manual and it doesn't shed much light on the issue.
I'm just wondering what the purpose of these two holes are and why one is capped and the other has a open hose on it. Are these supposed to both be capped?
Any help would be greatly appriciated thank you!
In between my carbs and my engine there are these two holes in the attachments. One just after each carb (they are labelled as number 6 on the attached picture). On my xs400, one of them is capped off and the other has a hose coming out of it. The end of the hose looks like it used to be attached to something but I'm puzzled why one would run somewhere and the other is capped, shouldn't both carbs be running identically? The hose feels to be a vaccuum of some sort, it is sucking in air when the bike is running, but the bike runs pretty similar with it open and when i plug it. I've checked my manual and it doesn't shed much light on the issue.
I'm just wondering what the purpose of these two holes are and why one is capped and the other has a open hose on it. Are these supposed to both be capped?
Any help would be greatly appriciated thank you!