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dr350-digest           Monday, July 19 1999           Volume 01 : Number 106




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Date: Sat, 17 Jul 1999 10:56:22 -0400
From: "Mark Sims" <[e-mail]>
Subject: (dr350) More: Pumper carb mods?

I also meant to ask what's the difference between the
Mikuni 33mm and 34mm pump carbs, which is best and why?
Which one comes on the stock DR350?

Mark

<----------------------------------------------------------->

Hi all,

I have a '98 DR350SE.  I'm putting on the magic airbox, a
BIGGUN exhaust/header with silencer and spark arrestor, and
I'm fitting the stock DR350 pump carb.

I've seen alot of talk about the JXNEEDLE/SPRING but I've
gathered that is for the CV carb.

Will I need to tune the pump carb when I install it?  I see
that Thumper Racing recommends a 130 or 132.5 main jet.  Does
that make the fuel/air mix richer?  Does the T-handle apply
to this carb and what does this adjuster do?  Do I need to
change the pilot jet, air jet, or needle?

Also, I plan to have the 435cc bore kit installed with a
Megacycle CAM this winter.  What additional changes will I
need to make then?

Thanks...Mark

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

Date: Sat, 17 Jul 1999 11:21:54 -0400
From: "David M2 Thompson" <[e-mail]>
Subject: (dr350) East Coast D/S Event Report

Ride Report:  AMA National Dual Sport - Mill Hall, PA - June 5th and
6th,
1999

On Saturday, June 5th, over three hundred riders gathered at Williamson
Suzuki-Honda for start of the 9th Annual Durty Dabbers AMA National Dual
Sport Ride.  The sign-up and start was right at the dealership, with
sign-up
running from 9 to 11 AM, and the ride starting promptly at noon.  The
start
time allowed out-of-towners to commute to the Mill Hall area that
morning,
rather than having to come down the night before and deal with an
additional
night's lodging.  Also, having the event start at the dealership allowed
participants to purchase roll chart holders, camelbacks, goggles, etc.
at
the last minute from Williamson Suzuki-Honda's well-stocked parts
department.

The Saturday portion of the ride was 92 miles.  It consisted of
approximately 50% trail and 50% dirt road with a small amount of
pavement to
connect the aforementioned.  Also, there were optional harder trail
sections
for the diehards.  The  Durty Dabbers (Sponsoring Club) did an excellent
job of
picking out some of the most scenic dirt roads, in the area.  Halfway
through
Saturday, there was a free refreshment stop with all sorts of goodies
for the junk
food junkies and the health nuts, along with the Suzuki Support Truck
providing free on-the-trail repairs.  The day finished up with the
riders
returning to the Clinton County Fairgrounds for a bar-b-que dinner
(included
with the entry fee), a trials demonstration put on by the Dirty Dabbers,
and
awards ceremony / door prize give-away.  After which, participants took
advantage of the $6/night camping, available at the Clinton County
Fairgrounds,
or went off to one of the local motels for some much-needed rest.

Sunday started off with a breakfast ($5.00) at the Fairgrounds, a short
rider's meeting,
then off to hit the trails by 9:00 AM.  The Sunday portion of the ride
also featured
moderately easy trail sections for the beginners and more street
orientated
bikes, optional difficult trail sections, and scenic dirt road
sections.Midway, there was
a free spaghetti lunch. The Majority of the riders finished up between
3:00 and 5:00 PM,
at the Clinton County Fairgrounds.

Finally, even though this event is doable for riders of all skill
levels, it
is extremely rocky.  Skid plates, spare inner tubes, and hard-terrain
tires
should be considered mandatory.  At least one individual cracked their
engine case open, due to the lack of a skid plate.  Flat tires were not
abundant but a few riders experienced them.  One rider, who we shall
call
Ned S. or maybe N. Storm for confidentiality reasons, arrived at the
event
with a brand new soft-terrain tire and ended up leaving with a road
racing
slick.  He also left a trail of rubber chunks behind him, this must have
been in case he got lost.

Overall this is an excellent event, which was doable for beginner riders
and
offered reasonable challenge to the experienced riders along with some
spectacular scenery.  I would rate this event a "must do" if you live
within
6 hours of Mill Hall, PA.  Where else can you get to ride 100 to 200
miles
of new trail, get three meals, see a trials demonstration, get a
complimentary fanny pack, win door prizes, and become eligible to win a
brand new 1999 Suzuki DR350ES; all for the $45 pre-registration fee.
Hope
to see you there next year!

David M2 Thompson
AMA# 504560  STOC# 840
Current STable
90 Suzuki DR350S
91 Honda ST1100
94 Honda VFR



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

Date: Sat, 17 Jul 1999 08:50:02 -0700
From: jessekientz <[e-mail]>
Subject: Re: (dr350) Pumper carb mods?

Hi Mark Your stuff is on the way, sounds like you might be giving up on the
Quiksilver,  If you go with the pumper I would suggest a 140 or a 142.5 main
to
balance out with the freer flowing exhaust system and the airbox the pilot
should be ok but the needle should be in the fourth groove down. The T
handle thing is the air screw that you can access easier. It is located just
under the front spigot in a recessed hole I understand that on the electric
start models that a little fileing away of the extended part of this hole is
necessary I believe this is only on the CV carbs.You may not have to do this
with the spacer in place. The larger jets richen the fuel mixture and the
air screw will richen things up when opened 1&1/2 to 2 turns out should be
close . I you use the 33mm pumper which is on the dirt models. you will have
to drill out the right hand air bleed jet as per the airbox instructions
with a #55
drill its very easy to get at. Thumper Has these carbs. I am not aware of a
34mm pumper.  Jesse


Mark Sims wrote:

> Hi all,
>
> I have a '98 DR350SE.  I'm putting on the magic airbox, a
> BIGGUN exhaust/header with silencer and spark arrestor, and
> I'm fitting the stock DR350 pump carb.
>
> I've seen alot of talk about the JXNEEDLE/SPRING but I've
> gathered that is for the CV carb.
>
> Will I need to tune the pump carb when I install it?  I see
> that Thumper Racing recommends a 130 or 132.5 main jet.  Does
> that make the fuel/air mix richer?  Does the T-handle apply
> to this carb and what does this adjuster do?  Do I need to
> change the pilot jet, air jet, or needle?
>
> Also, I plan to have the 435cc bore kit installed with a
> Megacycle CAM this winter.  What additional changes will I
> need to make then?
>
> Thanks...Mark
>
> Visit dr350 archives at http://www.listquest.com/lq/search.html?ln=dr350
> Subscribe to Dual Sport News...write to [e-mail] for info.


Visit dr350 archives at http://www.listquest.com/lq/search.html?ln=dr350
Subscribe to Dual Sport News...write to [e-mail] for info.

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

Date: Sun, 18 Jul 1999 18:21:39 EDT
From: [e-mail]
Subject: (dr350) Need help from the DR experts on a an XL250 honda

Hello fellow DR owners.

I need some advice, I just picked up an 86' Honda XL 250. The bike needs work
but in great shape otherwise. This bike is very similar to our DR's. I think
Suzuki copied many features and designs from this bike, Four stoke thumper,
Four valve etc...

Anyway, to the problem.. The guy I bought the bike from said his dad bored
the Honda out while he was repairing the timing chain which jumped out of
timing. Probably because he never changed the oil. He never got it running
and it sat for many years until I came along and gave him $300. for it. Well,
I took it home and replaced the cracked intake manifold and unplugged the
varished filled Carb and she fire right up.
The bike runs good at Idle and at low speeds but when I open it up the bike
sounds boggy like it's not or is getting too much air.

What I know:     (1) The Engine has been bored(Bore size Unknown)
                        (2) Valves are within clearance
                (3) Air box has not been modified
                (4) all polution junk still hooked up
                (5) spark plug dry and normal looking
                      (6) stock exhaust

Let me know if you have any ideas....I'm thinking Jetting


HAMMY

SUZ DR350SEW
Honda XL250R

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End of dr350-digest V1 #106
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