ADVrider

Go Back   ADVrider > Riding > Regional forums > The Rockies It's all downhill from here...
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-19-2007, 05:30 PM   #16
RKeeble
Adventurer
 
RKeeble's Avatar
 
Joined: May 2006
Location: Colorado
Oddometer: 80
950 Jetting

I'm running with this setup and it's good for me:

Akrapovics
158/160 mains
42 idle jets
2 turns out
70 idle air jets
FactoryPro needle @ /2

It is slightly lean at idle when it is colder, but with the recent heat wave it's been good so I haven't yet bothered to adjust the idle screws.

I haven't noticed any flat spots.

Denver altitude.

Gas mileage is forty-something per gallon when cruising.

The mains could probably go a skootch leaner.

-Rob
RKeeble is offline   Reply With Quote
Old 07-19-2007, 07:21 PM   #17
AntWare
Lost In Translation
 
AntWare's Avatar
 
Joined: Oct 2002
Oddometer: 16,483
Fella's, one thing I haven't seen mentioned is the different jets front/rear.
Stock jetting is 155 front, 160 rear, so if you want to go leaner swap the front to the rear and drop a 150 in the front,

...and put the money you save in your tyre fund
__________________
Choose Life. Choose a job. Choose a career. Choose a family.
Choose a fucking big television.
Choose sitting on that couch watching mind-numbing, spirit-crushing game shows,
stuffing fucking junk food into your mouth.
Choose rotting away at the end of it all, pishing your last in a miserable home,
nothing more than an embarrasment to the selfish, fucked up brats you spawned to replace yourself.
Choose your future. Choose life.
I chose not to choose life, I chose something else instead.
AntWare is offline   Reply With Quote
Old 07-19-2007, 07:25 PM   #18
Hayduke
///SAFETY THIRD///
 
Hayduke's Avatar
 
Joined: Jun 2004
Location: Salida, coloRADo
Oddometer: 43,571
Quote:
Originally Posted by Ant Ware
Fella's, one thing I haven't seen mentioned is the different jets front/rear.
Stock jetting is 155 front, 160 rear, so if you want to go leaner swap the front to the rear and drop a 150 in the front,

...and put the money you save in your tyre fund

oooohhhh yeah......That's what we did to HP2Beater's bike..... Now I remember!
__________________
"What these people need is some mental psychology."-Bonnie Abbzug

Hayduke is offline   Reply With Quote
Old 07-20-2007, 08:44 AM   #19
DakarNick
Swabee
 
DakarNick's Avatar
 
Joined: Oct 2005
Location: Parker, Colorado
Oddometer: 6,540
Quote:
Originally Posted by DakarNick
Guys, after the emissions removal won't the bike be running leaner since the air that was going to the cats is now staying in the engine to be burned?
I posted this, can anyone comment on it or am I totally wrong?
__________________
'06 KTM 950 Adventure S
'12 Ram 2500, Cummins, 6-speed auto, Laramie Longhorn, RamBox
Must be part of your super-secret double-naught spy work with your low-level FEMA clearance and (snicker) Texas Security License, yes?
DakarNick is offline   Reply With Quote
Old 07-20-2007, 09:54 AM   #20
Hayduke
///SAFETY THIRD///
 
Hayduke's Avatar
 
Joined: Jun 2004
Location: Salida, coloRADo
Oddometer: 43,571
Quote:
Originally Posted by DakarNick
I posted this, can anyone comment on it or am I totally wrong?

You're right. I think at higher elevations, it needs to be leaner still, though.
__________________
"What these people need is some mental psychology."-Bonnie Abbzug

Hayduke is offline   Reply With Quote
Old 07-20-2007, 07:01 PM   #21
Deano955
Insatiable
 
Deano955's Avatar
 
Joined: Jan 2005
Location: Eames Lounge Adv'er
Oddometer: 3,932
Dan,

I think if you could just keep from sticking it in the mud, you would be just fine...

__________________
Fuck Cancer! Fuck Heart Disease! RIP Dad and Mom -summer 2014
Save $5 off your smugmug account with this coupon( 1qoLJk8tfsGWM )
Deano955 is offline   Reply With Quote
Old 07-21-2007, 08:13 AM   #22
Yellow Pig OP
Allergic to Asphalt!
 
Yellow Pig's Avatar
 
Joined: Oct 2004
Location: Kalifornia
Oddometer: 7,054
Now what fun would that be.

That 0.0000032456% of power increase w/ a properly jetted bike might be the difference between this:



and


__________________
So Many Idiots, So Few Comets!!!!!!!!!
Yellow Pig is online now   Reply With Quote
Old 07-21-2007, 06:14 PM   #23
309
Special Purpose
 
309's Avatar
 
Joined: Jul 2004
Location: Boulder, CO
Oddometer: 5,457
Well, I played with the jetting today..

I had the previously mentioned flat spots, a bit of hunting at steady throttle on the 4-5k range, and an intermittent off-idle stutter pulling from lights.

My jetting was stock, needles in stock position,and fuels screws in stock position, which if I remember right was 2.25 out front/1.75 out rear.

After reading way too much about jetting 950's in Orange Crush, this is what I did..

One step leaner mains, now 150/155. I've had some black soot at the tailpipes and a gas smell making me think it might have been a bit rich. I thought I might get a slight perfomance boost with leaner mains at our elevation, but did it mostly because I wanted to increase m.p.g.

Raised the needles a clip. This seems to be the most common change made to 950's with aftermarket pipes. It's said to eliminate the flat spots and hunting.

I left the fuel screws alone, as I had no issues at idle.

Result?

Success!!!

Started cold with no choke. It never did this before, even with high ambient temps like we had today. I know some people think this means it's too rich at idle, but every bike I've had that carbureted well did this..

Pulls cleanly to redline. No flat spots. Seems to rev quicker as well.

No hunting at steady throttle.

I'm going to call this good enough. I'll give another report on m.p.g. and overall rideability after West Fest.
309 is offline   Reply With Quote
Old 07-21-2007, 08:46 PM   #24
Yellow Pig OP
Allergic to Asphalt!
 
Yellow Pig's Avatar
 
Joined: Oct 2004
Location: Kalifornia
Oddometer: 7,054
Thanks Saul,

Just to be clear: "raised the needles a clip" = set the clip one slot/position lower on the needle so it rides higher.
__________________
So Many Idiots, So Few Comets!!!!!!!!!
Yellow Pig is online now   Reply With Quote
Old 07-21-2007, 09:32 PM   #25
309
Special Purpose
 
309's Avatar
 
Joined: Jul 2004
Location: Boulder, CO
Oddometer: 5,457
Quote:
Originally Posted by Yellow Pig
Thanks Saul,

Just to be clear: "raised the needles a clip" = set the clip one slot/position lower on the needle so it rides higher.

Correct.
309 is offline   Reply With Quote
Old 07-22-2007, 03:18 PM   #26
GregInBoulder
Jerry rules. Get over it.
 
GregInBoulder's Avatar
 
Joined: Nov 2003
Location: Boulder, CO
Oddometer: 2,411
And put the float bowls back on before you reseat the carbs. And the idle adjust cable needs a jerk or two 'bout then as well.
__________________
GIB

"Stupid should be painfull" - FatChance
GregInBoulder is offline   Reply With Quote
Old 08-16-2007, 08:27 AM   #27
radiowazee
Golewahz???
 
radiowazee's Avatar
 
Joined: Jul 2006
Location: Denver, Colorado USA
Oddometer: 421
Hade mine tuned on the dyno at Fay Myers -- the guys did a fantastic job -- running very strong in the city and also up high in the hills.

I'm on a 2006 950S -- running FMF Q2 Ti headers/cans, which removes the cat, but I left the SAS system on the bike.

The carbs come stock with 155 and a 160 main jets. What they did is took the 160 and replaced the 155...then they put a 165 in the place of the 160.

So my setup is now 160/165 main jets...they raised the needles 1 clip and richened the Fuel Screw 1/2 turn.

I don't have a scan of the dyno power readout -- but it's a smooth straight line all the way up with no dips/surges in power.

I'm really pleased with this setup -- I've also got a 16T front cs so the newly tuned engine combined with the lower gearing is almost TOO hot to handle!

Howard
__________________
When I'm not rockin' @ radio.wazee I'm screamin' around Denver on my:

- 2006 KTM 950 LC8 Adventure-S GO!!!!!!! **Sold**
- 2003 BMW K1200RS **Sold**

RALLY PAN-AM RIFF RAFF '08, '09, '10 EXTREME Member
radiowazee is offline   Reply With Quote
Old 08-16-2007, 08:56 AM   #28
Wayne Weber
why are we stopping?
 
Joined: Aug 2003
Location: Golden CO
Oddometer: 3,854
It would be great if 309 and Radiowazee dyno'd their bikes at the same time...
__________________
Wayne

04 KTM 950 S
93 KTM 550
93 XT225 Adventure Serow!
00 Weber Rally Twin (www.rallytwin.com)
Gas Gas 270
2 Waterbuffalo's (Sold!)
Wayne Weber is offline   Reply With Quote
Old 08-16-2007, 06:28 PM   #29
Yellow Pig OP
Allergic to Asphalt!
 
Yellow Pig's Avatar
 
Joined: Oct 2004
Location: Kalifornia
Oddometer: 7,054
Wazee,

So they made the bike richer? Shouldn't it be leaner for up here!?!
__________________
So Many Idiots, So Few Comets!!!!!!!!!
Yellow Pig is online now   Reply With Quote
Old 08-17-2007, 06:30 AM   #30
scaryfast
Strugglin' to be Average!
 
scaryfast's Avatar
 
Joined: Apr 2005
Location: The Rox, Colorado
Oddometer: 586
Quote:
Originally Posted by Yellow Pig
Wazee,

So they made the bike richer? Shouldn't it be leaner for up here!?!
When you change out the exhaust your increasing power, with more power your flowing more air and with air you need more fuel. The 950/990 in stock form are very restricted and in fact a little lean from the factory. If you change out just the exhaust and don't richen up the jetting they become even more lean.
__________________
Bryan Penney
Fay Myers Motorcycle World
Full Factory Offroad LLC
KTM 450SX-F Factory Edition
1997 BMW R1100GS
scaryfast is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 09:12 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014