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Enduro Intake/Carburetion - 2 stroke Jetting, Reeds, Air Filters, etc. |
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#1
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EC 300 2012 - jetting for singletrack (not racing)
Hello,
I am a new GG owner from Belgium and am looking into getting my bike right for me. I'm not racing, love to play around in the woods, got some open gravel roads connecting singletracks. Don't need the most power out of my bike, but am looking for a nice crisp performing machine with decent miles per gallon. I have browsed the forum a bit to look for a good jetting for my bike, but up till now I haven't come up with a good setting just yet. I think the bike is a bit rich for the riding I do, I also get a lot of spooge drooling down the exhaust. It's not the mufflerpacking, since the bike has only run 100km (+-60miles) or so. Bike is completely stock now: main 175 PJ 42 needle N1EF clip 3 AS 1 out I run premix at 1:50, riding around sealevel with temperatures in the range of 5-25?C. PLEASE HELP pHreaC |
#2
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So you have browsed, but have you tried anything yet? Have you tried lifting the clip one position on the needle to lean that out. It appears you're once clip richer than what most the bikes deliver with. You do have some coolish temps though.
Thumperrider1 has installed the NEDJ needle in his 2012 and is very happy with it. It gives good clean power off the bottom with no real big hard hits waiting to bring you undone. Want more power, open the throttle more. It may be what you're looking for for your forest fun! |
#3
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Lowering the needle is an option, but is it enough?
I was more thinking that I would need for example a 38PJ and a 170 main. Some more miles per gallon would be appreciated, but I don't want to lean the bike out to much and create excessive wear and tear. ps: 5-25?C is 40-80?F |
#4
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i would try one thing at a time. drop your main jet to a 172,keep everything else the same.as much as some people say the main jet doesn't come into play, i have found that a skinnier hole in the main makes the bike leaner across the entire rpm range.
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#5
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That is what I have found as well, adjust de PJ for the lower throttle opening and the main for full open position. This is why I wanted to have em both go down.
I would think that if I were to change one jet at a time, it would be the PJ. grtz pHreaC |
#6
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maybe this helps to understand
Full load: larger main jet nozzle -> mixture becomes richer smaller main jet nozzle -> mixture is leaner 1/4 to 3/4 throttle: Needle-> Set-> clip higher lean Needle-> clip lower down the page-> richer 1/8 to 1/4 gas: Slide> cutaway more> lean Slide-> smaller cutaway> richer larger pilot jet -> richer mixture smaller pilot jet -> leaner Idle to 1/8 Gas: Idle screw pure-> more idle Idle screw out-> less idle Mixture screw (air filter side) -> in richer Mixture screw (air filter side) -> out leaner Mixture screw (cylinder side) -> in leaner Mixture screw (cylinder side) -> out richer
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4 strokes are only good for power generators |
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