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dr350-digest          Friday, October 1 1999          Volume 01 : Number 177




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Date: Thu, 30 Sep 1999 13:12:43 -0600
From: "Kurt Simpson" <[e-mail]>
Subject: (dr350) Forward post...

> > Question:  I have a '98 DR350SE with the Showa forks and shock.
> > I'm upgrading the fork springs and shock spring and installing
> > the Kouba link.  I'm wondering if the Race-Tech gold valves
> > are a significant upgrade of either the forks or shock.
> >
> > Does anyone with the Showa forks/shock have experience with
> > the gold valves?
>
>   I'm also interested in hearing if anyone has used the gold valves and
> if they felt it was worth it.
>
>   My impression is that if you are running at race speeds, then I would
> think they would be worth the investment because they'll help smooth out
> the little stuff which should lead to a better handling bike.  But for
> casual trail riding and non aggressive MX, I think I can put up with a
> bit of stiffness.
>
> --
> Scott Aldrich
> '98 Suzuki DR350SE
>
>
>


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Date: Thu, 30 Sep 1999 17:40:43 -0400 (EDT)
From: [e-mail] (John)
Subject: Re: (dr350) air box mods

Jesse what kind of cfm's can be expected from your box a stock head and
optimum jetting(around 140).A stock box with a clean filter 134cfm, carb
can flow 145cfm,and the head 148(of witch only 145 usable due to maxed
out carb flow.By the way is that the cv or 'dirt only carb?).That tells
me I can expect 11cfm's more at most from your airbox?And from that
4-7hp?Do these numbers go up with aftermarket exhuast i'm installing a
FMF Megamax2 along with your box and jetting.Thanks!!!


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Date: Thu, 30 Sep 1999 19:37:43 -0700
From: [e-mail]
Subject: (dr350) Re:

Chuck,

Resale value?  Who did you buy the bike for, you or the next owner?
Furthermore, a dirt bike has got to be one of the worst possible
purchases to make as an investment.  You bought the bike for YOU, enjoy
it.  Or buy another that you enjoy more, but remember do it for you, not
anyone else...

Dave
(2) 1990 DR350's


charles w vokac wrote:
>
>  I wouldn't modify
> the airbox because I think it lowers the resale value.  Who wants a bike
> that someone has mutilated?
>
> Chuck Vokac
> Panama City Beach, FL  '92 DR350S

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Date: Thu, 30 Sep 1999 16:54:59 -0700
From: jessekientz <[e-mail]>
Subject: Re: (dr350) air box mods

HI Scott, what I am referring to here is the volume of fuel mixture that can flow through the intake
ports past the valves at maximum lift into the combustion chamber with a 24 inches of vacuum pulling
under the head simulating the piston at a downward intake simulation done by a flow bench. The flow
bench is used in this manner to give some close representation as to how the engine will respond in
a running situation.

 Now we all know that there are variables, such as altitude, barametric pressure, temperature etc.
that can affect things. I have a DR350 here now that has the Airbox a bored pumper carb, oversize
headerpipe mega 4 pipe [fmf] and has a 147.5 main, fourth groove down on the needle and stock pilot,
that is almost as responsive as my 435 off the bottom and is a totally stock motor. It just falls
off sooner than the 435. When you go to the 435 you increase the vacuum and can draw in more fuel
mixture due to the larger displacement opening up the carburetor also helps this significantly. If
you stick with the cv carb. the results will not be as dramatic as the pumper. Keep the questions
coming guys........ this is fun.
Jesse

Scott Aldrich wrote:

> jessekientz wrote:
> >
> > Hi Joe, they are used in a lot of air boxes, and do let in more air, how ever in some cases
> > they can create a turbulence condition that does more harm than good. In being an airbox
> > manufacturer I have studied this area with considerable diligence. Its like porting you can't
> > just take out material to create a positive smooth flow sometimes you have to add material to
> > keep the flow moving without creating eddy's which are small areas of turbulence. I don't mean
> > to get carried away here but I feel That the whole storey should be presented in an
> > understandable manner.  The DR350 stock airbox substantiated by a flowbench test flows 134cfm
> > {cubic feet per minute}with a freshly serviced air filter element. It flows 142 cfm with the
> > door off and flows 145cfm with the filter clear out. The head flows 148cfm with the valves at
> > full lift and the carb flows 145cfm. from this information you can see why the vortex hiflow
> > air box that flows 265cfm which sets the engine up for any stage of performance modification
> > in existance. The little 1'' ports are not very effective and can set up conditions that would
> > be counter productive. Hope this information helps.
> > regards Jesse
>
> Hi Jesse,
>
>   Could you please define what the "head" actually is?  And if I do the
> 435 kit, does that improve the "head" flow to greater than 148cfm?  If
> the head flows greater than 148cfm after the upgrade, and I improve the
> air flow at the box by putting on your airbox, then it would seem that
> the stock carb would be limiting everything to 145cfm which would negate
> all of the other improvements.  If that's true, then how do you overcome
> the carb?
>
> Thanks for any information.
>
> --
> Scott Aldrich
> '98 Suzuki DR350SE


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

Date: Thu, 30 Sep 1999 17:16:26 -0700
From: jessekientz <[e-mail]>
Subject: Re: (dr350) air box mods

 Hi John,  The Vortex airbox will satisfy whatever the engine is setup to pull up to 265 cubic
feet per minute.  In my answer to Scotts questions I illustrated that with a oversize
headerpipe along with your megamax 2 will definitely open things up{ flow wise} and you will
probably have to jet up again on the main jet after its installation to match the increased
flow .

Jesse

John wrote:

> Jesse what kind of cfm's can be expected from your box a stock head and
> optimum jetting(around 140).A stock box with a clean filter 134cfm, carb
> can flow 145cfm,and the head 148(of witch only 145 usable due to maxed
> out carb flow.By the way is that the cv or 'dirt only carb?).That tells
> me I can expect 11cfm's more at most from your airbox?And from that
> 4-7hp?Do these numbers go up with aftermarket exhuast i'm installing a
> FMF Megamax2 along with your box and jetting.Thanks!!!
>
> Support Dual Sport News with your subscription http://www.geocities.com/~klrdsn/page2.html
> Visit the dr350 archives at http://www.listquest.com/lq/search.html?ln=dr350
> Unsubscribe by sending a message to [e-mail]
> Leave subject blank, message is unsubscribe dr350 (or dr350-digest).


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

Date: Thu, 30 Sep 1999 20:30:58 -0400 (EDT)
From: [e-mail] (John)
Subject: Re: (dr350) Re:

WELL PUT!!!!!!!


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

Date: Fri, 1 Oct 1999 05:07:09 EDT
From: [e-mail]
Subject: (dr350) For Sale DR350se 1991 in England

Im now getting a new DR350s so im selling my

1991 DR350se 12000 miles

It has a Scotts damper, Dep exhaust, Tax, MOT, two sets of wheels on and off=20
road wheels fitted with new MT60 tyres

Im asking about =A31550 but if any one from the list makes an offer its thei=
rs

And it comes with a trailer because i have a new one

Tony

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

Date: Fri, 1 Oct 1999 07:20:50 -0400
From: "Hoge, Neill" <[e-mail]>
Subject: (dr350) DR350 On road question

HI all,
I'm getting ready to put a "99" DR350 dirt on the road (Virginia, US). If I
run it down the road for an hour or so at 60 MPH, will the bike overheat,
lockup, or otherwise get damaged? Everything is stock except for MT 21's and
a Baja Designs light kit. Any input, suggestions much appreciated!.

Neill

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

Date: Fri, 1 Oct 1999 08:29:10 EDT
From: [e-mail]
Subject: Re: (dr350) DR350 On road question

Neil;

The two versions of this bike are essential identical as far as the engine
and gearbox; even the gear ratios are the same. That should allay your fears
your dirt only version will toast itself on the open road.

Mike
' 93 DR350

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

Date: Fri, 1 Oct 1999 07:12:12 -0600
From: "Kurt Simpson" <[e-mail]>
Subject: Re: (dr350) DR350 On road question

What about the rear hub?

- ----- Original Message -----
From: <[e-mail]>
To: <[e-mail]>
Cc: <[e-mail]>
Sent: Friday, October 01, 1999 6:29 AM
Subject: Re: (dr350) DR350 On road question


> Neil;
>
> The two versions of this bike are essential identical as far as the engine
> and gearbox; even the gear ratios are the same. That should allay your fears
> your dirt only version will toast itself on the open road.
>
> Mike
> ' 93 DR350
>
> Support Dual Sport News with your subscription
http://www.geocities.com/~klrdsn/page2.html
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> Unsubscribe by sending a message to [e-mail]
> Leave subject blank, message is unsubscribe dr350 (or dr350-digest).
>
>


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

Date: Fri, 1 Oct 1999 09:30:59 EDT
From: [e-mail]
Subject: (dr350) GPS

I am considering the purchase of a GPS unit to mount on my DR for those
occasions when we going exploring in new areas.  Does anyone have any
experience using a GPS on a motorcycle?  Will they take the pounding of off
road use?

Steve
97 DR350

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

Date: Fri, 01 Oct 1999 06:24:55 -0700
From: jessekientz <[e-mail]>
Subject: Re: (dr350) DR350 On road question

HI Kurt, was visiting with Norm Kouba this last weekend we had a great time.  He came over
from the Boise Idaho area to a home machinist's show in Eugene and then down to visit me in
Grants pass OR I thought it would be good to put another face to match the text that we read
from time to time. During our many discussions the rear hub on the DR/S model came up and Norm
was saying that on the later models of the DR/S that they are the same as the dirt model this
is the way I understood it any way, Norm Correct me if I am wrong on this.

regards  Jesse

Kurt Simpson wrote:

> What about the rear hub?
>
> ----- Original Message -----
> From: <[e-mail]>
> To: <[e-mail]>
> Cc: <[e-mail]>
> Sent: Friday, October 01, 1999 6:29 AM
> Subject: Re: (dr350) DR350 On road question
>
> > Neil;
> >
> > The two versions of this bike are essential identical as far as the engine
> > and gearbox; even the gear ratios are the same. That should allay your fears
> > your dirt only version will toast itself on the open road.
> >
> > Mike
> > ' 93 DR350
> >
> > Support Dual Sport News with your subscription
> http://www.geocities.com/~klrdsn/page2.html
> > Visit the dr350 archives at http://www.listquest.com/lq/search.html?ln=dr350
> > Unsubscribe by sending a message to [e-mail]
> > Leave subject blank, message is unsubscribe dr350 (or dr350-digest).
> >
> >
>
> Support Dual Sport News with your subscription http://www.geocities.com/~klrdsn/page2.html
> Visit the dr350 archives at http://www.listquest.com/lq/search.html?ln=dr350
> Unsubscribe by sending a message to [e-mail]
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------------------------------

Date: Fri, 1 Oct 1999 09:48:52 EDT
From: [e-mail]
Subject: Re: (dr350) DR350 On road question

Funny you should ask about that....I was going to mention the "cush" hub
found on certain street versions of dirt bikes, but as far as I can tell by
reading my Clymers manual, the dual sport DR does not have a "cush" hub.....I
can't speak from persoanl experience 'cause my machine's a dirt only version.

But, yes, you're right; a dirt bike will have the rear sprocket mounted
directly to the wheel hub and driveline shock will be absorbed through tire
slippage and wheel spin. A bike designed to be street ridden must accomodate
for this driveline shock and the common way it is done is to mount the rear
sprocket into rubber bushings.

If the dual purpose version of the bike in question has a "cush" hub, then
it's probably not a good idea to convert the dirt only version for street
running unless you change out the rear wheel/hub; all that driveline shock
gets transmitted directly into the gearbox which is not a healthy situation.

Mike
' 93 DR350

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End of dr350-digest V1 #177
***************************