Ec 300 2008
 

Got this used bike, not in perfect shape, but starts first kick hot or cold.
When I roll it on straights, no problems, valve opens, power acceptable (huge)
Low and mid speed grunt is acceptable. I'm just used to 4 strokes, so now I occasionally dig in.
MJ:168
PJ: 40 (replaced 42)
stock needle N1EF #3
Air: 1.5 - 2.5 (2.5 kicks in power quite sooner)
Series 1 carb
No mods (maybe sth wil surface, when I start digging into engine, which i love doing)
13:52 gears, will go to 51.
1:50 sint offroad premix
95 fuel, fresh mix every ride
Power valve inspected, cleaned to the bone.
Issues are:
Idling is sometimes high, sometimes just about to sign off, but it doesn't. I think it is minor bike lean angle sensitive.
Steep slippery full throtthle uphills, tested 2nd, 3rd gear, sun, rain mode, bike cant rev out. It is close, but seems like hitting rpm limiter. Its just that small amount of less wheel spin, so you cant reach the top. 3 rd gear got me higher, due to more speed, but feeling of not enough speen was again there.

When surface is flat, bike revs and overrevs normally and hugely.

Is it all about the float level being too high? (for starters?)

I'm UK based so may differ from country to country

03 ec3
Mj 178
Sj 38
Needle ktm n3eg. Off the top of my head
As 1.5 turns

Bike runs great removed the old needle as it use to burble low down or in woods and technical stuff and was fine when road riding or mx tracks.
The standard needle is rich down low I was going to down size the Sj to a 35 until I was told about the n3eg

You seem lean on the main jet to. Not a expert lol just bits I've picked up from the forum

Soz and I use a 13/48 sprockets works well for me

Do you ride steep slippery treacherous terran, with lots of hidden in grass fallen tree trunks? If 13 48 is ok for this, will rather switch to 50 rear and blame jetting for engine not so user friendly torque spread - responsiveness. MJ 168 is stock an by the plug colour, not lean. It just might be good for stock needle, but needle not being ok overall. Presume if i replace needle, would also need bigger MJ.

I ride all sorts of stuff mx tracks enduro tracks or green lanes.
this is my personal set up and everyone will differ and as jetting is depending on country but everyone says to get the standard needle and throw it in the bin, I put the ktm one in and it sorted out a lot of issues and I kept my jetting as it was .

This is what we mostly end up with, or even tighter, as ice storm leveled our forests at 1000 - 2600 feet, where we mostly ride.
https://www.youtube.com/watch?v=TGs1tuRpE98

maybe your gearing is ok for that type of riding, where is that mate

Needle does not affect main jet. 168 May not be too lean if it is a 36mm carb. First thing you need to do is toss the n1ef needle in a ditch somewhere far away from your home and get a nedw needle. And you need to get your float level set properly. There is a thread somewhere on here that has the proper measurements


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NEDW is too lean for airstriker I. Trust me, I know from first hand experience. Try CCK or one leaner, which is CEK, I believe.

Good info. I have never messed with a AS 1


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