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Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc. |
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Thread Tools | Display Modes |
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#1
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Jetting alternative wanted
On my 300/2018 I run the JD Kit in the 38 Keihin.
I have the feeling, that it is a little bit lean in the second half while its fine from zero to 1/4 throttle, but after that its a bit too lean in my opinion. Currently I run: MJ178, Clip 3, red JD needle, PJ42, AS 1.75 turns open. Temperature 82F, Altitude 600 ft Is there a known alternative to the standard N1EF needle? Its good once the throttle is at 1/4, but down low I dont like it. Any hints/tricks appreciated. |
#2
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The 3 guys I know with 2018 300's all use NECW I beleive.All of them have had their heads recut too.My bro gave up on his 250 '18 , and just bought a Beta 300.
All the 300's seem to run great now ( although they ran fine before too!!) |
#3
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The JD needles do lean off a lot towards WOT. Throw a bigger main jet at it.
Their red needle is a H diameter from memory. N3EH#3 178 with the same pilot will make for some aggressive power. NECW is a good choice for nice linear delivery. One step leaner on the diameter for clean delivery off idle.. and just builds. Similar in profile to the N1EF once past the first taper. |
#4
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Thank you guys!
Quote:
Quote:
I'll get a NECW needle too. Thanks again Doc edit: ordered the NECW, will receive it probably Thursday next week :-) |
#5
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I have the N1EH in my GP at the moment. Very cold and sea level riding and it is great. A little thirsty on fuel compared to the NEDW but starts better and never knocks, even when stuck in a gully with radiators about to boil.
Jakobi, Second half of the needle looks visibly leaner than the NEDW. I should mic them up and see.
__________________
EC300 2019 (11 Gassers owned, many more to go) |
#6
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Cheers Keg.. I haven't laid them beside eachother for a long time. I'll have a look today at some point too. The N3 needles are very thick right through to the point in comparison to both the N1 and NE series.
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