Jetting Database - PLEASE ADD YOUR SETTINGS
- Thread starter MattR
- Start date
Davehuge
Member
N1EG works great for me!
Bike year & model = EC300 2004 with PWK38 AS1
Temperature (degF) = 60F to 90F
Elevation (feet) = 0 to 3000 Feet
Main jet = 170
Pilot jet = 38
Needle & notch = N1EG Notch 1 (leanest)
Air screw setting = 1 Turn Out
Throttle valve/slide = 7
Results:
Starts easy, idles nice, clean and crisp straight from idle to all throttle positions, pulls hard. Very pleased with it.
Running on 98 Octane Unleaded.
Ipone Samourai 100% Synthectic or Motorex Power Cross 100% Synthetic both at 2% (50:1)
I read a lot of negative comments about the N1EG needle but it works great for me. Maybe I've just dropped lucky and the N1EG suits my carb/bike.
One thing I noticed is it's very sensitive to clip position. On notch 4 it won't start properly, keeps wetting the plug. At notch 3 and 2 it won't pull cleanly at 50% to 75% throttle. At notch 1 it works great.
Thanks to MattR for setting up this thread, very useful.
Bike year & model = EC300 2004 with PWK38 AS1
Temperature (degF) = 60F to 90F
Elevation (feet) = 0 to 3000 Feet
Main jet = 170
Pilot jet = 38
Needle & notch = N1EG Notch 1 (leanest)
Air screw setting = 1 Turn Out
Throttle valve/slide = 7
Results:
Starts easy, idles nice, clean and crisp straight from idle to all throttle positions, pulls hard. Very pleased with it.
Running on 98 Octane Unleaded.
Ipone Samourai 100% Synthectic or Motorex Power Cross 100% Synthetic both at 2% (50:1)
I read a lot of negative comments about the N1EG needle but it works great for me. Maybe I've just dropped lucky and the N1EG suits my carb/bike.
One thing I noticed is it's very sensitive to clip position. On notch 4 it won't start properly, keeps wetting the plug. At notch 3 and 2 it won't pull cleanly at 50% to 75% throttle. At notch 1 it works great.
Thanks to MattR for setting up this thread, very useful.
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2001 xc 300
2001 xc 300 PWK 38
Temperature (degF) = 60F to 90F
Elevation (feet) = 6500 to 11,000 Feet
Main jet = 165
Pilot jet = 35
Needle & notch = CEL needle at clip 2
Air screw setting = 2 Turns Out
Throttle valve/slide = 7
Fuel: 87 octane premixed between 50 and 60:1
Has the larger Checkpoint Offroad PV cover and FMF Gnarly pipe.
Results:
Starts easy, idles nice, clean and crisp straight from idle to all throttle positions, pulls hard. Very pleased with it.
2001 xc 300 PWK 38
Temperature (degF) = 60F to 90F
Elevation (feet) = 6500 to 11,000 Feet
Main jet = 165
Pilot jet = 35
Needle & notch = CEL needle at clip 2
Air screw setting = 2 Turns Out
Throttle valve/slide = 7
Fuel: 87 octane premixed between 50 and 60:1
Has the larger Checkpoint Offroad PV cover and FMF Gnarly pipe.
Results:
Starts easy, idles nice, clean and crisp straight from idle to all throttle positions, pulls hard. Very pleased with it.
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Installed slide #6 in May just before enduro trip to Poland and WOW!!! Much stronger pull on low RPM, it's almost like a 300 now.
Jim Cook
Platinum Level Site Supporter
Have you tried the RB Designs head mod? It's well worth the money in fuel mileage alone, and it makes throttle response much more crisp.
My riding elevations are very similar to yours.
In my 2006 DE300 with the AS1 carb, my favorite settings are:
Main jet summer-175 winter-178 (If there are going to be long wfo straights in a hare scramble I always run the 178)
Needle - N1EG with clip in second groove from the top
pilot jet - 42 (best idle for my bike. 45 gave stronger/harder mx style starts, but loaded up and fouled plugs while working trail during the summer in the "low" mountains of Arkansas. I think it was because of extended idling and so much trailing throttle going down long downhills. With the 42 pilot it didn't load up, and only spooged out the exhaust just a little bit.)
Slide - 7
I mix non-ethanol 93 octane premium pump gas mixed with Amsoil Dominator at 42/1 (16oz per gallon) (A "ring wear text" showed me that the extra oil gave me better ring wear than 50/1, and the extra oil makes my carb settings slightly leaner.)
My 2006 came with the MotoTasarini V-Force reed block and reeds. (first year for them)
Regarding the RB Designs:
I asked Ron to do the mod to increase my mileage on my 2006 DE300.
After the first ride in the mountains, I came home and added a 10oz flywheel weight. The change in throttle response had the rear end of the bike coming around even with the front in rocky off-camber turns, and sometimes flat sandy turns.
My mileage from a tank of fuel went from around 40 miles to around 65-70 miles. Some came from a more efficient fuel burn, and some of it came from making more power at lower throttle settings, and some from me being more careful with the throttle.
I am happy with the extra mileage, and the extra snap makes me grin.
Good Riding and Wrenching to You!
Jim
.
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2018 EC250 Six Days
NEDW #2, 40p, 172m, a/s 1.5, Motul 710 @ 2% in 98Ron fuel, 0-1000m asl, 5c-35c
The bike was a spooge machine (albeit still making nice fat, slightly doughy power) til I dropped the needle from #3 & the weather started to cool off. 21c today.
I had the bike under heavy load in some steep single this morning & it's lost none of the bottom end with the needle drop as far as I can tell. Pulls pretty much like my Beta RR300 did. No spooge, starting & idling beautifully.
This setting works for me. Hopefully just an a/s tweak &/or clip to #3 in winter is all it'll need.
Loving the bike so far.
NEDW #2, 40p, 172m, a/s 1.5, Motul 710 @ 2% in 98Ron fuel, 0-1000m asl, 5c-35c
The bike was a spooge machine (albeit still making nice fat, slightly doughy power) til I dropped the needle from #3 & the weather started to cool off. 21c today.
I had the bike under heavy load in some steep single this morning & it's lost none of the bottom end with the needle drop as far as I can tell. Pulls pretty much like my Beta RR300 did. No spooge, starting & idling beautifully.
This setting works for me. Hopefully just an a/s tweak &/or clip to #3 in winter is all it'll need.
Loving the bike so far.
Jacob 'Berg
Member
How was the float level from the factory? Are they using the ASII or the AS1 screw top carbs?
The dealer had a look at the float level when pd'ing the bike I believe. The bike does around 10km/L, so economy good.
AS1 with the butter screws - replaced them with a sturdier screw.
Jakobi
Super Moderator
That's the AS2, flat cap secured by 2 x m5 bolts.
AS1 is a round internally threaded cap.
Gasser Nate
New member
2018 Ec300 0-1000ft
40 pilot NEDW #2 172 main.
Electric smooth power, barely even feel the power valve open. But crack the throttle and it sings nicely pulling through into a crisp strong top end.
Less than 5l for over 58 k?s of tight nasty terrain.
40 pilot NEDW #2 172 main.
Electric smooth power, barely even feel the power valve open. But crack the throttle and it sings nicely pulling through into a crisp strong top end.
Less than 5l for over 58 k?s of tight nasty terrain.
2018 300GP - PWK 38
Temperature (degF) = 68 F to 86 F
Elevation (feet) = 300 to 1000 Feet
Main jet = 176
Pilot jet = 40
Needle & notch = JD Blue, clip 3 from top
Air screw setting = 2 Turns Out
Throttle valve/slide = no clue, sorry
Fuel: 102 Octane with 80:1 (Amsoil Saber Pro) or alternative
Fuel: 95 Octane with 60:1 (Putoline MX9)
Float height: 1mm lower than specified
Spark Plug: NGK BR8EG
FMF pipe and muffler (OEM)
Crankcase vent disconnected from intake boot (like on XC model)
Temperature (degF) = 68 F to 86 F
Elevation (feet) = 300 to 1000 Feet
Main jet = 176
Pilot jet = 40
Needle & notch = JD Blue, clip 3 from top
Air screw setting = 2 Turns Out
Throttle valve/slide = no clue, sorry
Fuel: 102 Octane with 80:1 (Amsoil Saber Pro) or alternative
Fuel: 95 Octane with 60:1 (Putoline MX9)
Float height: 1mm lower than specified
Spark Plug: NGK BR8EG
FMF pipe and muffler (OEM)
Crankcase vent disconnected from intake boot (like on XC model)
Chris_tian
New member
Hello,
at the moment i try this at my 2018 GP
Location: Europe/Germany
Temp: hot 25-32c 77-89F
Elevation: 0-300m 0- 1000F
Pilot 40
Main 172
Needle: N1EF
Noth: #2
Slide 9
AS 1,5
It is much better but i think the needle is the problem so i try the NEDW.
at the moment i try this at my 2018 GP
Location: Europe/Germany
Temp: hot 25-32c 77-89F
Elevation: 0-300m 0- 1000F
Pilot 40
Main 172
Needle: N1EF
Noth: #2
Slide 9
AS 1,5
It is much better but i think the needle is the problem so i try the NEDW.
It is really cold here at the moment. Bottom of Australia.
So I thought I would try something different from the NEDW. It was a little lean if I trailed throttle into corners or ran the idle too high.
GP300 2018
300-500m above sea level
5-10 degrees c (40-50f)
N1EH #3
Pj 42
Mj175
As 1 1/4
It starts really easily and is strong and linear through the rev range. I little heavy on fuel, but overall very rideable in cold weather. Stalls a little bit but I haven't checked the float height yet.
So I thought I would try something different from the NEDW. It was a little lean if I trailed throttle into corners or ran the idle too high.
GP300 2018
300-500m above sea level
5-10 degrees c (40-50f)
N1EH #3
Pj 42
Mj175
As 1 1/4
It starts really easily and is strong and linear through the rev range. I little heavy on fuel, but overall very rideable in cold weather. Stalls a little bit but I haven't checked the float height yet.
motopsycho87
New member
2006 ec300 - sea level
Pwk38
38p
NECH top clip
168 main
2002 ec300 supermoto
Pwk38
35p
NECH top clip
165 main
Both run I credibly well and haven't seized yet! (The NExx needles are rich at full throttle, hence small mains)
Pwk38
38p
NECH top clip
168 main
2002 ec300 supermoto
Pwk38
35p
NECH top clip
165 main
Both run I credibly well and haven't seized yet! (The NExx needles are rich at full throttle, hence small mains)
Head cut & bowl reshaped (TSP Australia 
). Squish now 1.35mm.
42p, 175m, a/s 1.5, NEDW #3, Motul 710 @2% in 98RON.
Quiet, smooth, clean power. No spooge to speak of. More bottom end/mid post-head cut and the bike is liking a 42p now, too.
I?m pretty finicky with jetting set up & this is spot on for the bike, rider & terrain.
). Squish now 1.35mm.42p, 175m, a/s 1.5, NEDW #3, Motul 710 @2% in 98RON.
Quiet, smooth, clean power. No spooge to speak of. More bottom end/mid post-head cut and the bike is liking a 42p now, too.
I?m pretty finicky with jetting set up & this is spot on for the bike, rider & terrain.
Jacob 'Berg
Member
2018 XC 250
Head has been cut for 100 octane race gas.
Temperature: 95 degrees F - 80 degrees F
Elevation: 2000'-7,000'
Pilot: 40
Main: 172
Needle: NEDW 2nd position
A/S: 1.5 out
Moltul 710 @ 50:1
Bike pulls very strong from bottom to top. Noticeable gain in bottom and mid from cut head and power delivery is more linear now. Still getting a good amount of spooge from pipe.
Head has been cut for 100 octane race gas.
Temperature: 95 degrees F - 80 degrees F
Elevation: 2000'-7,000'
Pilot: 40
Main: 172
Needle: NEDW 2nd position
A/S: 1.5 out
Moltul 710 @ 50:1
Bike pulls very strong from bottom to top. Noticeable gain in bottom and mid from cut head and power delivery is more linear now. Still getting a good amount of spooge from pipe.
2019 EC300 - PWK 38
Temperature (degF) = 50 F to 86 F
Elevation (feet) = 300 to 1000 Feet
Main jet = 178
Pilot jet = 42
Needle & notch = JD red, clip 3 from top (JD blue on#3 below 50F)
Air screw setting = 2,25 Turns Out
Fuel: 98 Octane with 50:1 Putoline MX9
Float height: 1mm lower than stock
Spark Plug: NGK BR8EIX (iridium)
FMF muffler (OEM)
Crankcase vents disconnected from intake boot (like on XC model)
Temperature (degF) = 50 F to 86 F
Elevation (feet) = 300 to 1000 Feet
Main jet = 178
Pilot jet = 42
Needle & notch = JD red, clip 3 from top (JD blue on#3 below 50F)
Air screw setting = 2,25 Turns Out
Fuel: 98 Octane with 50:1 Putoline MX9
Float height: 1mm lower than stock
Spark Plug: NGK BR8EIX (iridium)
FMF muffler (OEM)
Crankcase vents disconnected from intake boot (like on XC model)
