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Enduro Intake/Carburetion - 2 stroke Jetting, Reeds, Air Filters, etc.


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  #261  
Old 01-09-2017, 04:32 AM
VilluEST VilluEST is offline
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2014 EC250ER with AS2 on sea level from -10C to 28C:
182 main, 42 pilot, N3CJ on 3'rd clip, slide #7
Need to adjust air screw for winter-summer temp differences (technical trail riding - low rpm's). Haven't done ice track, but I suppose that needs raising the needle.


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  #262  
Old 06-23-2017, 10:14 PM
lneil06 lneil06 is offline
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Quote:
Originally Posted by Rod Overstreet View Post
2015 EC300

Pilot- 40
Main- 175
AS- 1&1/2 turns out
Needle- JD RED, 3rd clip
Slide- #8
Premix- 50:1 Sprectro

Result...perfection.

What kind of mileage are you getting ?

Lenny
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  #263  
Old 10-01-2017, 04:20 AM
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Davehuge Davehuge is offline
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Default 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.

Last edited by Davehuge; 10-01-2017 at 05:31 AM.
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  #264  
Old 10-01-2017, 11:27 AM
Archibald Archibald is offline
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Default 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.

Last edited by Archibald; 10-01-2017 at 11:32 AM. Reason: additional info
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  #265  
Old 10-03-2017, 03:35 AM
VilluEST VilluEST is offline
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Quote:
Originally Posted by VilluEST View Post
2014 EC250ER with AS2 on sea level from -10C to 28C:
182 main, 42 pilot, N3CJ on 3'rd clip, slide #7
Need to adjust air screw for winter-summer temp differences (technical trail riding - low rpm's). Haven't done ice track, but I suppose that needs raising the needle.
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.
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  #266  
Old 10-19-2017, 01:15 AM
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Jim Cook Jim Cook is offline
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Quote:
Originally Posted by Davehuge View Post
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.
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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Jim Cook
Smackover Racing
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'11 Gas Gas EC250 (primary ride)
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Last edited by Jim Cook; 04-17-2018 at 09:59 AM.
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  #267  
Old 04-17-2018, 09:20 AM
Gibnut Gibnut is offline
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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.
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  #268  
Old 04-17-2018, 02:57 PM
Jacob 'Berg Jacob 'Berg is offline
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Quote:
Originally Posted by Gibnut View Post
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.
How was the float level from the factory? Are they using the ASII or the AS1 screw top carbs?
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  #269  
Old 04-17-2018, 05:38 PM
Gibnut Gibnut is offline
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Quote:
Originally Posted by Jacob 'Berg View Post
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.
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  #270  
Old 04-17-2018, 06:23 PM
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Jakobi Jakobi is offline
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Quote:
Originally Posted by Gibnut View Post
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.
That's the AS2, flat cap secured by 2 x m5 bolts.

AS1 is a round internally threaded cap.
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