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dr-digest          Monday, February 21 2000          Volume 01 : Number 045



(dr) 1993 DR 350
Re: (dr) mmmmmm ... DualStar
(dr) Grease specification
RE: (dr) re: Vortex air box

----------------------------------------------------------------------

Date: Sat, 19 Feb 2000 15:05:43 -0800
From: "Jesse Wardlow" <[e-mail]>
Subject: (dr) 1993 DR 350

I have a 93 DR 350 that has been flawless for since the day I bought it new.
I havent rid it in about 6 months and when I went to start it, I broke the
compresion cable.  No big deal.  I have started it several times with out
one.  Well this time I could not get it to start.  So I left it alone and
ordered a new cable.  After installing the new cable I have found that I
have no compression now.  I can crank it over with my hand.  After
investigating further I have found that the compression lever on the motor
is some what stiff.  So I moved it around by hand and after turning it to
the corect postion for the motor to be running, I have more compresion, but
cn still kick it over with my foot easly.  After taking off the caps on the
top of the engine I have found that when I pull the cable and the
decompresion lever opens, after kicking it over, It does not click and go
back to the closed postion.  Any help would be great.  Thanks.


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------------------------------

Date: Sat, 19 Feb 2000 22:18:37 -0800
From: Mike A Hyers <[e-mail]>
Subject: Re: (dr) mmmmmm ... DualStar

Lisa,

Dual-star's web site is http://www.dual-star.com/  , unfortunately there
is not much up for dr's yet.  It's worth checking out for the klr stuff
though.

Mike


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------------------------------

Date: Sun, 20 Feb 2000 20:04:21 +0000
From: Iain Wilson <[e-mail]>
Subject: (dr) Grease specification

Hi,

Could I ask which preparation of Castrol grease is best for the
suspension on my 99 DR 350 please?

Thanks,

Iain

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------------------------------

Date: Sun, 20 Feb 2000 23:56:18 -0800
From: "Jesse Kientz   www.kientech.com" <[e-mail]>
Subject: RE: (dr) re: Vortex air box

Hi Jan,  I have a fellow that is supposed to bring one over this coming week
to check out the feasability of fitting one up to the late DR650.

Regards,
Jesse Kientz
http://www.kientech.com/

- -----Original Message-----
From: [e-mail] [mailto:[e-mail]]On
Behalf Of Jan Bradley
Sent: Saturday, February 19, 2000 8:07 AM
To: [e-mail]; [e-mail]; [e-mail];
[e-mail]; [e-mail]
Subject: RE: (dr) re: Vortex air box


Hey Jesse,
                   Is there, or is there ever going to be a Vortex air
box for the DR650?

JB

>>> "Jesse Kientz   www.kientech.com" <[e-mail]> 02/18/00 08:34PM
>>>
Well put Greg.....Jesse

- -----Original Message-----
From: [e-mail]
[mailto:[e-mail]]On
Behalf Of Greg Lara
Sent: Friday, February 18, 2000 6:05 PM
To: [e-mail]; [e-mail]; [e-mail]
Subject: (dr) re: Vortex air box


Ideally, an air box should be tuned like a pipe, but to deliver the
opposite
effect. In the case of a pipe, after an exhaust pulse leaves the port
and
travels to the end of the pipe, a negative wave (a pulse of low
pressure)
reflects back from the opening at the end of the pipe and travels back
to
the exhaust port.   A performance pipe is tuned so that the negative
wave
arrives at the exhaust port just as the port is opening. This
encourages the
exhaust gasses to exit the combustion chamber more quickly, allowing
for
more rapid replenishment of fresh fuel-air mixture. In this way, a
tuned
pipe allows the engine to breathe even more freely than an engine with
no
pipe at all. That is, a tuned pipe helps suck exhaust from the engine.

A similar even takes place within the air box. The engine gulps in
air,
lowering the air pressure inside the air box. Outside air then rushes
into
the air box under atmospheric pressure. Even as the pressure inside the
air
box becomes equal to pressure outside, the momentum of the in-rushing
air
carries a little more air into the air box, raising the pressure inside
the
air box above atmospheric pressure. If the air box is tuned right, the
pressure inside the air box should reach its maximum just as the
engine
takes its next gulp of air. In the ideal case, more air flows into the
engine with the air box than with a bare carburetor. In other words, a
tuned
air box can help cram more air into the engine.


- --Greg

DR350SE '94
CR250 '91
XR650LE '94
VFR750 '91


- -----Original Message-----
From: [e-mail]
[mailto:[e-mail]]On
Behalf Of [e-mail]
Sent: Friday, February 18, 2000 5:35 PM
To: [e-mail]
Subject: Re: (dr) (DR350) Gearing Change


Inlet valves opening, still air chambers filling, engines being
satisfied...I
love it!

>From what little I know, I'm going to say Jesse's right.. an airbox
is
better
thru out the RPM range than just a sock airfilter... there's some
mysterious
sonic wave pulses within the box that's part of the design and overall
tuning
of the motor... like a flute meant to resoanate at different notes...
because
I know you can't just drill big holes indiscrimintly (in a hurry my
spelling
sucks) in the airbox... it ruins the awesome powerband of the DR!

Guy

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------------------------------

End of dr-digest V1 #45
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