tank venting, sooprise!!

blackgpz at rochester.rr.com blackgpz at rochester.rr.com
Wed Aug 8 10:41:50 PDT 2007

Larry, I've had pods on a couple of naked bikes without the problem you 
describe. I believe Art is right. My bowl vent tubes are routed right 
up under the tank/seat. If you take off the tank, there is a rubber 
damper with grooves in it. I route my vent tubes up through the holes 
in the frame member above the carbs and then lay them in 2 of the 
grooves in the rubber damper. The tank holds them in place without 
closing them off.


----- Original Message -----
From: Art Lischer <alisch80 at mchsi.com>
Date: Wednesday, August 8, 2007 9:29 am
Subject: Re: tank venting, sooprise!!
Cc: gpzlist at micapeak.com

> Larry,
> Sorry for the repeat, lol. As I was writing I was thinking this 
> was 
> familiar.  Cutting them should not hurt as long as it is to get 
> the ends 
> into a zone of quiet air.  Had same problem with my new Nighthawk 
> 700 
> back in '85.  Then it just took zip tying the hoses to a different 
> place 
> behind the airbox.
> Art in DM
> Larry Zoia wrote:
> >
> >
> >
> >> Larry,
> >> More than likely the carb bowl vent tube ends are in a spot 
> where air is
> >> rushing by and not allow in the bowls to vent properly.  
> Atmospheric air
> >> pressure must be able to equalize with the space above the fuel 
> level in
> >> the bowls or fuel will not flow.
> >>
> >> Moving your knees created a different air flow pattern around 
> the bike.
> >> Move the tube ends to a place that is not subject to air movement.
> >> Problem should go away.
> >
> > Yeah, Art, I remember your ealier post.  I had a hard time 
> wrapping my 
> > mind around that idea as I didn't know
> > exactly how they worked.  I figured that the siphoning effect 
> might 
> > actually help venting, but if the idea is to equalize pressure, 
> that 
> > makes more sense than the turbulence overcoming the intake at 
> the carb 
> > throats.
> >
> > Is there any problem with shortening the tubes?
> >
> >

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