Jetting for 2011 xc300

[onegreyghost]

Yeah the N1EF is not good. Go with the JD jetting kit for the yz but ask for a third needle he has that's 1/2 degree leaner than the blue tip 38 pilot 170 main as 3/4 out. If you can't get a Jd kit then go with a KTM N3EH 2ND position

[chucky]

I have just purchased a 2011 ec300 e-start , here in South Africa the dealer jets them with a N3EH needle

My settings for 4500ft and temp 80 - 90 fahrenheit

168 main
40 pilot
N3EH # 2
1,5-1.75 airscrew
Plug is a BR9eg
Mixture 40:1 ( maxima super m)

I also have a spare DDK needle but have not tested it yet

We found that the N3eh does not run so well in the 200 , the 200 is better with the DDk needle
clip #2
168 main
42 pilot
2 out airscrew

[BrentMartell]

My bike is still not finished being put together but I thought I would report on the jetting specs etc. This bike came with the handlebar mounted choke, which I have been told is the original carb intended to be on the bike from GG.

Stock:
N1E #3, 175 main, 42 pj, 6.5 slide.

Current:
n3ew #3 (2.73 mm), 175 main, 40 pj, 6.5 slide.

Looking at the float and thinking the 14-16mm is recommended there does not appear to be anyway this setting will work. 16mm puts the float at the float stops. So I set the float to near parellel (float seam to carb body).

All of this is untested and likely premature to post but I like to stir the pot I guess.

My riding specs are currently: 35-50 F, 3500-4500 ft, desert. When the snow comes off it will be 4500-6500, then 6500-10000 : )

[BrentMartell]

Ride Report- the engine on this bike is awesome. I have a moded KTM 300 that flat rips and this engine stock is ever bit as potent WOW. The jetting I chose is super close. I think I could go to a little richer needle and leaner pj. I also think I might need to run a 178-180 main. The plug checks show very little color and my pipe started to yellow. It's not blue but I am definitely getting a little too much heat.

Temps this weekend ran from 45-55 degrees, sand washes, trails, open, gnarly, 3500-4500 feet. The bike does not get good fuel mileage but neither did or does my ktm300 unless I am riding goat trails at 8000-10000 ft. I think the 2 bikes are about the same. Possibly with some head work ??? the mpg will improve.

[Tlineman]

Does anyone have any experience with a #8 slide and a N3EH needle? How bout a #8 slide in general with any other needle? I ride primarily from 2500 - 4500 ft and it can get quite warm here in the summer. Looking to pinpoint some jetting that I can tune with little more than moving the clip on the needle.

[Jakobi]

Originally Posted by Tlineman

Does anyone have any experience with a #8 slide and a N3EH needle? How bout a #8 slide in general with any other needle? I ride primarily from 2500 - 4500 ft and it can get quite warm here in the summer. Looking to pinpoint some jetting that I can tune with little more than moving the clip on the needle.

Whats wrong with the slip position?

Pilot Jet?
Air screw?
Different sized needles?

[BrentMartell]

Interesting ? about an 8 slide.

I have a N2ZW needle on #2, 175 main, 40 pj in my 300 currently. The bike runs great in Idaho 3000-5000 feet, temps from 40-55. I ran the exact same set up in Texas last Sunday, 3000 feet and 90-99 degrees. The bike still ran great, no spooge, clean, crisp. Weird. All I did was turn my AS out 1 turn.

[Tlineman]

Just got my bike a few weeks ago and have only riden it once. Jetting seemed okay, rideable but definitely a little on the rich side. I've ordered a N3EH needle and will definitely give it a try. A race a local series called the PNWMA and we have races all over BC from sea level to 6500 ft. On my old YZ, all I would do is move clip position around and it would run great. Figured a #8 slide might be the trick to clean the bike up and get a clean burn, with optimum mileage. I rode with widebear last week and he's running a #9 slide (which I think is a little too lean), and a KX needle. Not sure on the main and PJ size.

Based on what I've read in all the forums here, a CCK will run well, and is a good needle on a GG300, but delivers poor mileage. A N3** needle, be it KTM, Kawi or Yam will do much of the same, maybe with slightly better mileage. To me a #8 slide might help out with the mileage while using a N3** or a CCK needle that keeps the bike running clean, possibly in a slightly richer clip position. THoughts?

[Jakobi]

Originally Posted by Tlineman

Just got my bike a few weeks ago and have only riden it once. Jetting seemed okay, rideable but definitely a little on the rich side. I've ordered a N3EH needle and will definitely give it a try. A race a local series called the PNWMA and we have races all over BC from sea level to 6500 ft. On my old YZ, all I would do is move clip position around and it would run great. Figured a #8 slide might be the trick to clean the bike up and get a clean burn, with optimum mileage. I rode with widebear last week and he's running a #9 slide (which I think is a little too lean), and a KX needle. Not sure on the main and PJ size.

Based on what I've read in all the forums here, a CCK will run well, and is a good needle on a GG300, but delivers poor mileage. A N3** needle, be it KTM, Kawi or Yam will do much of the same, maybe with slightly better mileage. To me a #8 slide might help out with the mileage while using a N3** or a CCK needle that keeps the bike running clean, possibly in a slightly richer clip position. THoughts?

I think the coins would be better spent getting your head modded and squish band set perfectly than buying a new slide.