--- [EMAIL PROTECTED] wrote:
snip
> rib. Another tick I learned from a Yamaha factory
> instructor when I had an
> XS Eleven was to drill 4 separate 1/4 inch holes in
> a place so that each carb
> would get the same amount of air. The GTS air box
snip
I saw some "holes" in a catalog--they hold a chunk of
foam to keep the chunks out of the airbox--I think
they were 1" in diam. each.
> be
> much smaller. You can drill these holes in the GTS
> air box on the bottom
> and still have it filtered. This gives you a 1 inch
> total opening as if you
> instaled
> another intake port. It has made some difference
> and I believe that in time
> I
> may increase the holes a tad bit and cut back on the
> tubes that come in from
> the outside. These tubes are located where I don't
> think they are the most
> effective.
snip
I think the tubes are located where the air is most
still and not too hot--makes it easier on the
injection to do a good job
>
> The jet kit and Tormignomi pipes on my Duck you
> have to leave off the
> top part of the air box. When you open it the noise
> is like having a 4 barrel
> Holly double pumper in your face. But you do get
> the job done.
snip
Big holes are a famous FJ tuning trick to get big jets
and loud pipes to work. I always think I want more
power but really have plenty. Looking for a good air
filter system that does not rely on replacement. I
like two sets of foam or gauze to rotate, but that's
just me...
As with the
> crank vent system the
> next I go into mine if there is a layer of oil in
> there it may show that
> these holes
> have allowed not enough vacuum to draw the vapors
> and oil drops on to the
> inside of the airbox.
snip
Good point--one I had failed to consider...
Yamaha calculations
> figured that this was enough
> but they are trade offs that they had to consider.
> That's my .02&1/2.
>
> Ken Swartz
>
Thanks again for all the help!
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