2019 ec300 fuel

M

mrquick

New member
Hello everyone I have just taken delivery of a brand new ec300r, I took it for its 1st ride yesterday and did a nice running in period before slowly getting up to speed...
It ran a little boggy at 1st and i thought nothing of it with it being tight, through the day I started giving it a more power until it reached the 25mile mark and then started riding it as I normally would..
I did a route I do alot, my re fuelling point is at 47 mls from home my old 250 exc 2t would use about 5 lts of fuel well the gasser used the full 10lts I got to the fuel station on fumes... set off again to do my normal route home which is a distance of 60 miles i normally get home with a 1/4 tank left but I used 1 full tank 10lts and had to stop and put another 5 lts in to get home...
The bike fouled a plug so I changed it but the only one I had was a NGK BR9eg I noticed instantly it was running better ( will a 9 be ok to run or should I put a 8 in )
The next thing I noticed was when it was in the rain mode on the map switch when you shut off on a decent it made a clunky noise from the engine NOT the chain slapping, but when its in full power mode this disappeared ???
So can you guys point me in the direction of what to check.
I have had the carb and checked it and its got the standard jetting in and needle on the 3 position, the air screw was out 2 turns, I have just watched a video on float height so I will have to check that next..
I am really concerned on the amount of fuel the bike used has anyone else had this problem...
 
And get rid of that stock needle!!

I ran out of fuel at 60kms on my 2010 when it was new, on stock jetting. After some work and a better configuration it'd get to 100kms without having to switch to reserve pretty consistently.
 
 

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From everything I know and I'm sure others will tell you...the bikes leave the factory with very rich jetting, this results in poor/boggy throttle response, terrible fuel consumption, fouling plugs, etc.

My advice would be to check the carb float height, fit the recommended spark plug, then adjust the jetting.

Once you get the carb set up somewhere near it'll be great.

Plenty of info about jetting on this forum, just do a quick search.

Personally, I wouldn't worry about the squish at this time, that can be done later depending on how serious you are and if you feel the need.

All the best, Dave.
 
Davehuge said:
From everything I know and I'm sure others will tell you...the bikes leave the factory with very rich jetting, this results in poor/boggy throttle response, terrible fuel consumption, fouling plugs, etc.

My advice would be to check the carb float height, fit the recommended spark plug, then adjust the jetting.

Once you get the carb set up somewhere near it'll be great.

Plenty of info about jetting on this forum, just do a quick search.

Personally, I wouldn't worry about the squish at this time, that can be done later depending on how serious you are and if you feel the need.

All the best, Dave.
Click to expand...



Cheers Dave I will crack on and get it sorted...
 
If you give us your location/altitude/temperature then Jakobi might be kind enough to suggest a starting point for jetting, to give you a head start. :)

The standard no.7 slide is usually OK, so it"s a matter of trying different needles, main jets, pilot jets and clip positions. Most important to just make one change at a time, then test and keep notes so you don't get lost.

Make sure you're using a good quality full synthetic oil mixed at 50:1 (usually 50:1 but please check).

If you speak to your dealer (where you've just spent thousands) I would hope they'd help you out with supplying jets/needles at a discounted price! I wish GasGas and other manufacturers supplied a selection of jets/needles with their bikes.

Congratulations on your new bike, it looks stunning, I'm very jealous! :D
 
Congrats to your bike, I bought the same one recently. Let the squish alone at the moment, you will get it dialed in soon. the high fuel consumption is due to the too high float level, as it has been said before.

Open the fuel tap, wait 10 seconds, then tilt the bike slowly until you reach about 45 degrees. You will see that fuel spills out of the carb much earlier at about 60 to 55 degrees. Then its time to set the float height a tad lower. I have no clue about your tech skills but its not very difficult.

Next get rid of the standard needle, its crap. If you are not someone who is a racer or do a lot of WOT riding, especially in deep sand I recommend you to spend a few bucks on a JD jetting kit.

Alternatively you can try a NECW needle which should work better than the standard one.

Its a brilliant bike, have fun with it.

Thats mine:

34148475ch.jpg
 
Davehuge said:
If you give us your location/altitude/temperature then Jakobi might be kind enough to suggest a starting point for jetting, to give you a head start. :)

The standard no.7 slide is usually OK, so it"s a matter of trying different needles, main jets, pilot jets and clip positions. Most important to just make one change at a time, then test and keep notes so you don't get lost.

Make sure you're using a good quality full synthetic oil mixed at 50:1 (usually 50:1 but please check).

If you speak to your dealer (where you've just spent thousands) I would hope they'd help you out with supplying jets/needles at a discounted price! I wish GasGas and other manufacturers supplied a selection of jets/needles with their bikes

Congratulations on your new bike, it looks stunning, I'm very jealous! :D
Click to expand...



Hi Thank you all for the info so far, I am pretty good with the spanners I have been around bikes for alot of years so most things are relatively easy to tackle, I am in Derbyshire, uk, I rekon we are 950 ft above sea level, temp god knows one day it 9' and the next in the 20s', I trail ride and do hare and hound stuff as well as time card events (Welsh 2 day enduro) etc.
I use top quality relatively 2T oils at 50:1 with regular pump fuel...
 
Ahhh, Derbyshire...a great corner of the world! :)

Personally I haven't tried the JD Jetting kit but I've heard alot of good reviews, a bit expensive for 2 needles and 4 main jets, but it should put you somewhere very close to the correct jetting. For your bike you'd need the JDG003 kit.

I've haven't seen them for sale in the UK, except on eBay with delivery from USA...

https://www.jdjetting.com/xcart5/jdg002-gasgas-250-300-11-16-w-keihin-36-or-38mm-carburetor-clone-.html?category_id=65

On eBay... JD Jetting Jet Kit GasGas EC EX 250 300 2018 2019 Gas Gas JDG003... https://ebay.us/M2p95p

Alternatively, if you don't want to spend that much or wait for delivery from the USA, you could try these two needles. I believe they are close to the Red and Blue needles contained in the JD kit. ;)

Red = NECJ
Blue = NEDJ

Can anyone confirm if I've got that right?

The NECW that DocBrown has just suggested is one step richer than the NEDJ, so would also be a good starting point. See the chart below...

chart.jpg
 
Doc Brown said:
Congrats to your bike, I bought the same one recently. Let the squish alone at the moment, you will get it dialed in soon. the high fuel consumption is due to the too high float level, as it has been said before.

Open the fuel tap, wait 10 seconds, then tilt the bike slowly until you reach about 45 degrees. You will see that fuel spills out of the carb much earlier at about 60 to 55 degrees. Then its time to set the float height a tad lower. I have no clue about your tech skills but its not very difficult.

Next get rid of the standard needle, its crap. If you are not someone who is a racer or do a lot of WOT riding, especially in deep sand I recommend you to spend a few bucks on a JD jetting kit.

Alternatively you can try a NECW needle which should work better than the standard one.

Its a brilliant bike, have fun with it.

Thats mine:

34148475ch.jpg
Click to expand...



The bike looks great thanks for the advice...
 
mrquick said:
Should I put the current needle on position 2 just to try it until next weeks delivery ???
Click to expand...

Yes, why not, it won't do any harm, I assume it'll still be rich so no chance of doing any damage.

Good luck with the JD Jetting Kit, how much was it?

Don't forget to let us know how you get on with it!

All the best, Dave. :)
 
Davehuge said:
Yes, why not, it won't do any harm, I assume it'll still be rich so no chance of doing any damage.

Good luck with the JD Jetting Kit, how much was it?

Don't forget to let us know how you get on with it!

All the best, Dave. :)
Click to expand...


Ooooops I didnt ask the price O well its for a good cause :-}
I will keep the updates coming as she progresses...
Thanks
 
mrquick said:
Ooooops I didnt ask the price O well its for a good cause :-}
I will keep the updates coming as she progresses...
Thanks
Click to expand...

Tell him to get some kits for sale on eBay UK, as far as I can see he'd be the only person selling them in Europe! I might buy one myself! :)
 
Hi all
I have also just bought a 19 a week ago and a similar issue ...have done about 100 miles running it in and started to wind it up ready to race at the weekend ..i too noticed a very loud bang/knock from the cylinder when shutting off and rolling down big hills and dose not run very smooth when pottering on the road around 1/8 throttle .. ..l have dropped the pilot jet down to 40 which has made a bit of improvement and the spooge out of the exhaust has about gone ..but still have oiled two plugs..both while warming up the bike ...if my thinking is right it is still rich on the pilot as the engine starts instantly with out choke?

i am just going to check float height and try a 38 pilot jet as my next step ( my old 2012 racing i used to run 178 main 35 pilot and a EE needle ..but still was never good around 1/4 throttle )

at the moment I'm running Motul 800.. 90cc to 5 litres (55:1) 175 Main 40 pilot and the EF needle middle clip sea level about 12 to 14 degrees c. Isle of Man UK

any help would greatly appreciated ...apart from this jetting issue the bike is fantastic and definitely confidence building compared to the 12 :O)
 
Last edited:
Davehuge said:
Alternatively, if you don't want to spend that much or wait for delivery from the USA, you could try these two needles. I believe they are close to the Red and Blue needles contained in the JD kit. ;)

Red = NECJ
Blue = NEDJ

Can anyone confirm if I've got that right?
Click to expand...

Not really even close imo.

I measured up the JD needles. The blue is closer to an F diameter OEM needle. The red being around a H (slightly richer than the W).

JD needles are dual taper only, and lean off heavily towards WOT.

The Suzuki needles above are 3 taper and supply a load of fuel towards WOT.

A closer comparison to the JD Red needle would be the N3CH which you see many people are very happy with.
 
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