Jetting help - Fuel consumption

[Jakobi]

Hi everyone.

I'm looking for a bit of assistance. I'd like to know what others are using in the 2010 model EC's. Even other years will suffice, and how many KM you can get out of a tank before reserve.

Stock the bike had: 40, N1EF#1, 175 - The bike started easily and ran strong, however really poor fuel consumption, would smoke alot, and load up in the tight. It also suffered a burble in the mid range before coming onto full noise which got worse as it would load up.

Current: 40, N3EG#2, 175 - Bike feels less torqey and more snappy down load and into the mid. Nice transition into mid range where it continues to pull hard. Feels to sign off a bit on the top end. Bike also ran quite warm after giving it some abuse. Plugs read nicely.

Also, is there an easy way to access the bowl (main and pilot). Theres not much room under the carb and the tank stops it from rotating out.

Thanks, Jake

[2whlrcr]

What bike do you have? 200/250/300?

[Jakobi]

Sorry forgot to add that.

Its a 2010 EC300 Race.

Temp 20 - 35C
Humidity 65 - 100%
Elevation 0 - 500M

[moto9]

I think the 40 PJ is fine... a 38 is too lean for most conditions and the MJ seems in the ballpark.
So, I'd look to the needle and possibly a MJ adjustment.
Some of the GG needles I have seen vary quite a bit in the middle, can't remember the # but one was fairly fat and thinned down quickly in it's taper.
Might be what you have, as you open the throttle it dumps too much fuel too quickly.

Some wide open plug chops should tell you how spot on the MJ is, if it's close then the needle is where I would concentrate my efforts.
Drop it and see if there's and improvement...if so your on the right track.
Hope that helps.

[Jakobi]

Thanks Mate.

I have settled with the N3EG#2, 40P, 175M, for now. If the N1EF wasn't already on top clip I'm sure one more up would have done it.

The N3EG#3 is too rich. A bit richer than N1EF#1. N3EG#2 is leaner up till 5/8ths and then richens up onto the main.

Plug chops are all reading perfect. Seat of the pants is crisp and responsive with a strong pull as you hold the throttle open.

Now I just have to set my mind at peace and ride on! I plan on getting another friend with some experience to take it for a ride to see what their impressions are.

Thanks again.

Will report back on fuel economy after the next ride

N1EF#1 was 7L for 70km.

[swazi_matt]

I am using an N3EH needle and am at about 1000m, but only get about 75km on a full tank