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 12-18-2012, 06:59 AM #71956 GRinCR Oppressed Nomad     Joined: Apr 2011 Location: Alajuela, Costa Rica via MN. Oddometer: 326 Old School vs New School Pre vs. Post '96? Just your 2 cents. Cheers __________________ Greg Smith '90 DR650RS Costa Rica: Trippin' with GR , The Bike Teardown _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ "My father taught me to work; he did not teach me to love it." -Abraham Lincoln GRinCR screwed with this post 12-18-2012 at 12:07 PM Reason: Self nuke and taken elsewhere...
 12-18-2012, 07:36 AM #71957 Mongle Knuckle dragger     Joined: Dec 2009 Location: North Carolina Y'all Oddometer: 3,272 Muffler flow I just want to add some to the muffler debate. I think you guys are missing a point: an engine is nothing more than an air pump. The more air you can get in it the more fuel you can add the more HP you get. Simple right? While everyone is correct that a 650cc pulse of exhaust is harder to quiet then a 250cc pulse- you are missing the most important part of engine dynamics= airflow. Doing the rough math: A DR650 with a CFM efficiency of .7 (basic figure for carb 4 cycle engine) flows 56.1 CFM A GSXR1000 with efficiency of .9 (basic fuel injection 4 cycle engine) flows 190 CFM! That is about 3.5 times as much air goes through the GSXR as the DR (at max RPM). Even with two mufflers the GSXR mufflers were DESIGNED to flow more air per muffler then the DR engine flows. How much air per pulse really has nothing to do with HP numbers; only dB. Also, on a side note. When designing or selecting an air filter they recommend a filter that flows 2 times the air the engine requires.
12-18-2012, 07:50 AM   #71958
Rusty Rocket
Life behind "Bars"

Joined: Dec 2005
Location: Trying to leave CT
Oddometer: 9,727
Quote:
 Originally Posted by heirhead There is ALWAYS shrinkage in colder climates!! Heirhead
I WAS IN THE POOL!!!
__________________
on one side the sign it said "Private Road", but on the other side it didn't say nothin'
2009 DR650
..1972 Penton Six-Days ..1971 Suzuki TS185.. 2005 KTM 400exc
Member of: AMA, NETRA, Blue Ribbon Coalition, CCCofVT, Berkshire TR, CT Ramblers

12-18-2012, 07:53 AM   #71959
996DL
Buell me

Joined: Aug 2006
Oddometer: 2,354
Quote:
 Originally Posted by LexTalionis I like the exhaust tone of the OEM canister...

Jesse's airbox mod, Dynojet needle with clip 3 NOT 4 down from the top, 155 DJ mainjet for oem exhaust (Jesse's standard recommendation), Kientech's fuel screw aprox. 1 1/4 turns out at 2200' asl, no flat spots (unlike with the DJ's needle's clip placed 4 down from top ) , great mileage and pulls like a bear, with my tall geared roadie usage.

Did I mention smooth as silk, for a large displacement single...

996DL

12-18-2012, 07:56 AM   #71960
Rusty Rocket
Life behind "Bars"

Joined: Dec 2005
Location: Trying to leave CT
Oddometer: 9,727
Quote:
 Originally Posted by dogjaw If I was making more money selling a particular exhaust system, I'm sure that I could justify it with charts/pulses/stats; who wouldn't? All I know is that I am fully satisfied with my mediocre, relatively quiet, non packable, stock-appearing though obviously inferior to the aftermarket,GSXR pipe.
I have a SuperTrapp IDS II w/ quiet core,that I was running with 6 discs. I put my stock silencer back on and I'm sooo happy with the quiet that it's staying. (been a bout 2 years now). I really couldn't feel the difference , in a "seat of the pants test". The only real benefit for me with the SuperTrapp was the weight savings up high. ('bout 8 lbs)
__________________
on one side the sign it said "Private Road", but on the other side it didn't say nothin'
2009 DR650
..1972 Penton Six-Days ..1971 Suzuki TS185.. 2005 KTM 400exc
Member of: AMA, NETRA, Blue Ribbon Coalition, CCCofVT, Berkshire TR, CT Ramblers

Rusty Rocket screwed with this post 12-18-2012 at 08:01 AM

12-18-2012, 08:02 AM   #71961
procycle

Joined: Jun 2007
Location: Center of the DR650 universe
Oddometer: 2,455
Quote:
 Originally Posted by Thumper Dan thanks Jeff, While your on the forum, I was curious if you ever bought Jays (jaminglobal) former motor which he blew up but was reconditioned just prior to his misfortune?? It would be good to know if this motor got back up and running and I remember reading you were going to buy it?? Not sure if you did though. thanks
Yup, I took Jay's old motor and built the first 780 2 years ago which is still in my main bike. It's never been apart since the original build, still runs very strong and doesn't use any oil.
__________________
Clarke's second law of Egodynamics: "For every expert, there is an equal and opposite expert." - Jasper Fforde
www.procycle.us - Everything for your DR650 and lots of other great stuff!
DR900 Big Bore Stroker buildup
TurboDiesel Corvette - go to the end to start at the beginning

 12-18-2012, 08:09 AM #71962 Mambo Dave Backyard Adventurer     Joined: Oct 2011 Location: 11 ft. AMSL Oddometer: 5,859 I'm thinking of raising the handlebars through handlebars alone, not risers. Anyone happen to know how much higher the CR high bar style would ride over the stock modern DR650 bars? I've measured based on specs I've seen, but it looks like they wouldn't be enough of a rise to justify those over a higher design if I wanted to avoid risers.
12-18-2012, 08:15 AM   #71963
procycle

Joined: Jun 2007
Location: Center of the DR650 universe
Oddometer: 2,455
Quote:
 Originally Posted by Mongle I think you guys are missing a point: an engine is nothing more than an air pump. How much air per pulse really has nothing to do with HP numbers; only dB. Also, on a side note. When designing or selecting an air filter they recommend a filter that flows 2 times the air the engine requires.
Oh I get it. I was trying to explain that HP doesn't have all that much to do with how the exhaust is restricted.
The point is that a bunch of small pulses can slip through a restriction easier than one big pulse.
And of course a big pulse takes more "processing" inside the muffler to get the required 80dB sound level.

This applies to intake through the airbox too which is why the DR responds so well to opening up the airbox.
__________________
Clarke's second law of Egodynamics: "For every expert, there is an equal and opposite expert." - Jasper Fforde
www.procycle.us - Everything for your DR650 and lots of other great stuff!
DR900 Big Bore Stroker buildup
TurboDiesel Corvette - go to the end to start at the beginning

procycle screwed with this post 12-18-2012 at 08:21 AM

12-18-2012, 08:18 AM   #71964
procycle

Joined: Jun 2007
Location: Center of the DR650 universe
Oddometer: 2,455
Quote:
 Originally Posted by Mambo Dave I'm thinking of raising the handlebars through handlebars alone, not risers. Anyone happen to know how much higher the CR high bar style would ride over the stock modern DR650 bars? I've measured based on specs I've seen, but it looks like they wouldn't be enough of a rise to justify those over a higher design if I wanted to avoid risers.
CR high bars will be about 1/2" to 3/4" taller than stock DR bars. Not much but enough to feel the difference.
__________________
Clarke's second law of Egodynamics: "For every expert, there is an equal and opposite expert." - Jasper Fforde
www.procycle.us - Everything for your DR650 and lots of other great stuff!
DR900 Big Bore Stroker buildup
TurboDiesel Corvette - go to the end to start at the beginning

12-18-2012, 08:23 AM   #71965
Mambo Dave

Joined: Oct 2011
Location: 11 ft. AMSL
Oddometer: 5,859
Quote:
 Originally Posted by procycle CR high bars will be about 1/2" to 3/4" taller than stock DR bars. Not much but enough to feel the difference.
Thank you, I'll probably go higher with some other bar bend then.

12-18-2012, 08:23 AM   #71966
Rusty Rocket
Life behind "Bars"

Joined: Dec 2005
Location: Trying to leave CT
Oddometer: 9,727
Quote:
 Originally Posted by Mambo Dave I'm thinking of raising the handlebars through handlebars alone, not risers. Anyone happen to know how much higher the CR high bar style would ride over the stock modern DR650 bars? I've measured based on specs I've seen, but it looks like they wouldn't be enough of a rise to justify those over a higher design if I wanted to avoid risers.
Check here:

http://www.rockymountainatvmc.com/Ha...r-Measurements
__________________
on one side the sign it said "Private Road", but on the other side it didn't say nothin'
2009 DR650
..1972 Penton Six-Days ..1971 Suzuki TS185.. 2005 KTM 400exc
Member of: AMA, NETRA, Blue Ribbon Coalition, CCCofVT, Berkshire TR, CT Ramblers

12-18-2012, 08:56 AM   #71967

Joined: Mar 2010
Oddometer: 296
Quote:
 Originally Posted by Mambo Dave I'm thinking of raising the handlebars through handlebars alone, not risers. Anyone happen to know how much higher the CR high bar style would ride over the stock modern DR650 bars? I've measured based on specs I've seen, but it looks like they wouldn't be enough of a rise to justify those over a higher design if I wanted to avoid risers.

Edited: Look into ATV bends. I thought the ATV bends were really narrow but I was wrong. They look to have the most rise.

LucasLeader screwed with this post 12-18-2012 at 09:02 AM

12-18-2012, 09:02 AM   #71968
AeroEngineer

Joined: Mar 2008
Location: Tampa, FL
Oddometer: 231
Quote:
 Originally Posted by TrophyHunter Nicely done. I just put that same front fender on in my change over from blue to all white. Same Gen II Wolfman set up, too.

Thanks! I've noticed the polisport fender is a lot more aerodynamic than the original. It should allow a lot more air to get to the oil cooler, too.

Quote:
 Originally Posted by neo1piv014 Looks amazing! So what headlight are you running on it? It almost looks like you took the light off a KLX250.
Close... It's a Kawasaki KX450r (2009) headlamp. It looks a lot better than the stock 90's style dirtbike fairing.

It was a fairly straightforward mod. Just had to relocate the indicator lamps and turn signals, reverse the front turn signal brackets, and make a simple bracket out of some 1" aluminum angle stock. A handful of bushing/bolts/washers puts it all together.

http://imgur.com/wRrZY
http://imgur.com/p5XT2
http://imgur.com/s4kzp
http://imgur.com/iU1wT
http://imgur.com/FrJaz

The KX450R headlamp/fairing is a bit smaller than the KLX one, but still allows for a lot of spare room behind the shroud for the wiring harness and any other cabling.
__________________
-Robert
2010 Ural Patrol (mine)
2009 KLX250SF (hers)
2006 DR650 (???)

12-18-2012, 09:14 AM   #71969
Mambo Dave

Joined: Oct 2011
Location: 11 ft. AMSL
Oddometer: 5,859
Quote:
 Originally Posted by Rusty Rocket
Quote:
 Originally Posted by LucasLeader Edited: Look into ATV bends. I thought the ATV bends were really narrow but I was wrong. They look to have the most rise.

Thanks guys - an ATV bend was what I was looking at last week. That site's listing of specs all together is pretty cool for the handlebars, but I've been downloading PDF's too. I had one picked out that I think was about 155mm high, but can't remember who made it now. Some ATV bars wouldn't work well due to the angles the wrists would be at, so I'm trying to be careful about that.

Mambo Dave screwed with this post 12-18-2012 at 09:22 AM

 12-18-2012, 09:31 AM #71970 805gregg Just Stroming along   Joined: Jan 2006 Location: Ojai, Ca Oddometer: 1,593 I use the Protaper ATV high bars, have on 3 bikes, a great dual sport bar.

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