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


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  #11  
Old 04-12-2016, 10:23 PM
GGRider01 GGRider01 is offline
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Quote:
Originally Posted by lneil06 View Post
I just picked up some jets - 178 Main and a 38 and 40 pilot jet.

The needles is a N1EF with the e-clip in the middle slot.

Will make sure the float is working - I haven't seen any leaking out of the carb unless I tip the bike almost all the way over.

The carb has 2 screws on the top.
I think you're well on your way to getting it sorted. I'm sure the float is working as intended, but you should set the height. 6.5mm I believe, for the AS2.


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Old 04-13-2016, 05:37 AM
lneil06 lneil06 is offline
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It's just a little blubber at the bottom but still runs really well. What do you suggest for a needle?

We are at 230 feet temps between 40 and 60 now. I live in Massachusetts USA
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  #13  
Old 04-13-2016, 08:02 AM
95jersey 95jersey is offline
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N1EF is stock. I think 40P and 176M is stock, so you can try that.

It looks like you are rich on the bottom and lean up top based on that needle. I bet that AWD system sucks power, so I don't think you want an NEXX needle, as they are slightly leaner and have less hit on bottom.

Not sure how AWD effects mileage but it can't be good. Keep in mind a stock Gas Gas 300 only gets 45 miles to a full tank (give or take a few), so that is around 18mpg. Is the AWD sucking down another 10MPG??? We'll it could...but a leaner pilot should help, but I doubt you are going to see a dramatic improvement. No way a needle or pilot change is going to improve your MPG by 10.
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Old 04-13-2016, 08:39 AM
lneil06 lneil06 is offline
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I leave the AWD off most of the time unless I'm going up or through some crazy stuff. Then I'll turn it on.

The AWD only really kicks on when the rear wheel spins - which isn't that often. I have to say the bike is a blast in wet muddy, snowy, steep hills, rock gardens, water crossing, and sandy conditions.

I do have a oversized tank on the bike, and ride Turkey Runs - where gas stops are usually between 45 and 50 miles. I read one person getting 60 miles prior to cutting over to reserve - is that even possible ?

Lenny
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  #15  
Old 04-13-2016, 08:56 AM
lneil06 lneil06 is offline
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Jakobi - what do you suggest for a needle ? Or should I just change clip location as well ? I'm at the middle clips location - #3.

We do a lot of single track where i'm at - so having linear power is important.

I'll try next for jets - 40 Pilot - 178 main - is this a good starting point? I really need to get to 50 miles on a tank - or I'll have to fall back to my wr450 for Turkey Runs.

I'll try to calculate head squish - is there a good procedure for this somewhere?

Thanks

Lenny
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  #16  
Old 04-13-2016, 09:27 AM
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gasser gasser is offline
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For normal trail riding my GasGas 300s have averaged 23mpg before getting the head squish redone and 2-3 more mile per gallon after. I now have a 250 gasser with a NEDW (suzuki) needle and absolutely love it. Don't believe what you read about this needle being weak down low - it is as strong as any other needle and better than most. The power is not explosive, it does come on in a slow, very controllable way but it is very strong and clean at lower revs. People who ride in the mid range and above dislike the NExx needles but one may be just the ticket for the way you ride.
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  #17  
Old 04-13-2016, 10:56 AM
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What he said.

Have rb designs machine your head for squish and proper compressiom. Throw that n1ef needle in the garbage and get Yamaha or Suzuki needle and corresponding jets. Eg you should have richer pilot jet if it's set up rught.

Be sure to go up on pilot and be sure reset your idle screw. The idle screw should not be turned in to the point of being coil bound. Turn it out and reset it when going away from

I would also consider having rb designs mod yoir carb for you.

Jeff
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  #18  
Old 04-13-2016, 05:17 PM
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barossi73 barossi73 is offline
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He has a p42 in there which should suit ned?
On my 200 the p42 is slightly better than p40,and the sweet spot is nech#3 (nedh#2.5).the 300 should be pretty close,maybe a touch leaner.id start at p40/42,ned?3,then go to ned?2,this will give you a feel for the needle and nec? may not be necessary
If you go the n3c? Yam i believe its a thicker needle so jets get bumped up to suit. (More changes at once,may be more frustrating to dial in,although youre already changing needle and main)
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  #19  
Old 04-13-2016, 06:40 PM
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For less than the price of the JD kit you'll be able to buy about 7 x various Suzuki and ktm/Yamaha needles as others have suggested.

Also, not knowing US fuels or colder climates I can't give you specifics which I know will work. I am in a tropical climate; hot and humid all year around. Add to that unknown squish clearance and efficiency, and added load from the AWD system and its a lot of variables to account for. A W/H diameter needle is probably not a bad start but you'll need to fine tune from there.

My stock 300 on stock engine got 60km to reserve (when first owning a 2T and not really being much more than a competent rider). After head mods and better jetting, and going to a 250cc engine giving it a lot more throttle a lot more often, and shorter gearing I can usually get 100km to reserve. It's a pretty significant difference.
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  #20  
Old 04-15-2016, 09:09 PM
lneil06 lneil06 is offline
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Tonight I checked the float height, spot on at 6.5mm, so I don't think it's that, but was hoping. I also checked the reeds, they are in exceptionl shape.

I'll try the 178 main and 40 pilot tomorrow.
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