#71
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Quote:
I currently have put in the N1EF #3 with 42 pj and 180 mj with the #8 slide and the bike is as powerful as my previous YZ250 but has a hole just as the PV starts to open,(too rich) so I'll change the main to a 175 to see the difference. BTW weather here is around mid 30s C with high relative humidity for Greece (60%)
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EC250 2008 Skid plate, rad braces, Fork bleeders Drz 400 Motard '03 (full spec) Yz 250 '06, KTM exc 250 '05, exc 250 '04, exc 250 '02 WRF250 '02, KDX 220 '98, DT200R '93 all sold |
#72
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GG27 be careful when leaning off main jet.
I just blew a hole in my piston with the following 42PJ, JD blue #2, 172MJ, 8 Slide. I was doing 125 km/hr on a transport section at an enduro last month, backed off slightly on the throttle, when to power on again & PHUUT! - end of ride . The bike was running like an animal before hand & was too much in the rocks & logs so I was mostly running in the rain mode although not when she blew. It was pinging a bit during the event but plug checks looked to be OK (not white) & had a similar "hole" as you had described just before letting rip - possibly lean in hindsight. Lesson I learnt from this - take plenty of time to check new jetting in an area similar to what you'll be racing in & don't always trust what other riders have posted for jetting on their bikes as motor set-up, fuel, location can make a big difference. Have now just rebuilt the motor & will be going back to something more easily controlled in the rocks & logs ie 42PJ, CEK #4, 180MJ, #8 slide.
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GG GP300 18 KTM 350EXC 17 GG EC 450, GG EC 250 08, KTM 525 EXC 06, KTM 400 EXC 01, XR400 97, VTR1000 98, VFR750 95, Husaberg FE400 96, RMX250 91, Maico 490 84, IT250J 81, RM250C2 79, Bultaco Alpina 250 77 - All sold |
#73
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Good Begginer Settings
Here are my first settings:
Bike year & model = 2003 EC-250 Temperature (degF) =32f - 85f Elevation (feet) =0-3500 Main jet = 175 Pilot jet =40 Needle & notch = EG 3rd clip Air screw setting = 2 Throttle valve/slide = #6 This was my first two stroke and I purchased in January of 2009. I have a solid 6 months of riding with 3-4 rides a month and 2-6 hours of riding each ride. I would say the bike worked great and had no issues with being too lean or too fat. The plug was a latte color and it always started on the 2nd or 3rd kick. The power was perfectly linear, but fairly slow off the line. That's why I think this is a good setting for someone new to two strokes or dirt biking. It's been a great transition bike from my Honda CRF 250-X In warmer weather it seemed to idle a bit high, but was fixed with a half turn of the air screw.
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Howie 2008 KTM 530 Former Fantasies: 2007 KTM 525 2004 Honda CR250R 2011 Gas-Gas EC 300 2009 KTM 300 XC-W 2004 KDX 200 2000 KDX 220 2003 Gas-Gas EC 250 2004 Honda CRF 250X 2005 Honda CRF 250X What can I say, I'm schizophrenic and ambidextrous! |
#74
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Summer Settings for Western Washington
Here are my new settings:
Bike year & model = 2003 EC-250 Temperature (degF) =50f - 85f Elevation (feet) =0-3500 Main jet = 175 Pilot jet =42 Needle & notch = DDK 3rd clip Air screw setting = 2 Throttle valve/slide = #6 Installed new Power valve cover from Gofasters.com This is my second set up for my bike I purchased the bike in January of 2009. I have a solid 7 months of riding with 3-4 rides a month and 2-6 hours of riding each ride. I went from a 40 pilot to a 42 and a EG needle to a DDK. Can you say transformational? This changed the bike in several ways: It wheelies without hardly trying, yet it's very controllable. It's still super linear, but has throttle when you need it. When I'm in tight gnarly stuff, it keeps the front end light. So instead of pushing through the rough terrain, it floats over it creating a smoother ride. Thanks to Les from LTRracing.com and thanks to GoFasters.com for setting me up with the parts!
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Howie 2008 KTM 530 Former Fantasies: 2007 KTM 525 2004 Honda CR250R 2011 Gas-Gas EC 300 2009 KTM 300 XC-W 2004 KDX 200 2000 KDX 220 2003 Gas-Gas EC 250 2004 Honda CRF 250X 2005 Honda CRF 250X What can I say, I'm schizophrenic and ambidextrous! |
#75
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Thanks ECRider.
I went back to my original setting of CCK #3 42PJ, 180MJ and #8 slide. This worked really well in an extreme rocky enduro with lots of uphill rock crossings. It was just a wee bit lean when doing transfer sections (made knocking sounds when closing the throttle after keeping the throttle pined for over one minute) and engine boiled over for the first time! O.K. it was 36 Celcius! and only 1st and 2nd gear for over 30 minutes. So I guess I will raise the needle by half a clip. I also tried CCK #2 with a #7 slide but was a bit too rich of the bottom for my style of riding even if the air screw was 2 1/2 out. BTW I will never go lower than a 178 main on the 250's.
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EC250 2008 Skid plate, rad braces, Fork bleeders Drz 400 Motard '03 (full spec) Yz 250 '06, KTM exc 250 '05, exc 250 '04, exc 250 '02 WRF250 '02, KDX 220 '98, DT200R '93 all sold |
#76
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09 EC 300
2500 elv 172 mj 38 pj cck @3 a/s 1.0 out Good off the bottom, I still need to do some plug chops to check the top end |
#77
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General jetting guidelines for 2-stroke motors at elevation 8000 - 13000 ft.
Pilot: One step richer than stock. Needle: Clip in top notch (drop needle). Main Jet: Five steps leaner than stock. This guideline is the one suggested by Sunsports in Gunnison, CO. It has been used for many years on a wide variety of bikes. Obviuosly, the jetting changes outlined pre-suppose a properly jetted bike at or near sea level. Our application is an '08 DE 300. Specific jetting below. Stock Main: #178. Re-jetted for Altitude: #165. Needle: Clip in center notch. Re-jetted for Altitude; Clip in top notch. Stock Pilot: #45. Re-jetted for Altitude: # 48. These guidelines and settings have been used at the noted altitude with excellent results. |
#78
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Updated Settings:
2009 EC 300 Ele: 0 - 1500ft ASL Pilot: 40 Main: 180 Needle: JD Red, 3rd clip position AS: 1 1/2 out (tested @ 70*, will have to do some fine tuning here I suspect) Mixture: Castrol TTS @ 50:1 Removed reed block spacer. Very little spooge and plug chops reveal a good color.
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2009 GasGas EC300 2008 KTM 300XC - Sold 2004 KTM 450SX - Sold Last edited by 300XCRider; 03-26-2010 at 05:23 AM. Reason: Updated Jetting |
#79
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Quote:
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2003 EC250 w/ Ohlins pkg Sometimes you eat the bear, sometimes the bear eats you. |
#80
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They guy who did the prep on my bike said he mixes his at 100:1 and has not had any issues. An entire National Enduro season was ran at that ratio.
FWIW, I ran my KTM300 at 70:1 and after 80+ hours, no problems.
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2009 GasGas EC300 2008 KTM 300XC - Sold 2004 KTM 450SX - Sold |
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