2018 EC300GP Gas Pig and CRAP Mileage
 

Hey Guys -

Looking for feedback on the gas mileage and if anyone has worked on a fix. I'm getting 12-14 MPG while being really nice on the throttle. This weekend on a 100 mile ride and climbing between 100ft - 4000ft at an A level pace, I'm always worried about my gas with this bike.

Seems like the general consensus between guys with the same bike is the new 300 is a gas pig. Other guys with the 300 bought IMS tanks to alleviate the stress of running out of gas on longer rides. I've jetted the bike lean and the plug is perfectly tan without any carbon/oil build up on the porcelain and strap. I get a little spooge when putting in tight single track on the silencer... I attribute that mostly to the spark arrester and inefficient gas burn.

My friends '17 KTM 300 is burning 1.6 gallons less fuel in 50 miles and he rides the throttle like a complete asshole.

The only thing I can think of the head is causing an inefficient burn.
I'm thinking of sending my head to RK Tek to fix the squish and flute the flame cup.

Any other helpful suggestions?

Thanks!

Might be losing fuel while riding. Try lowering your float height 1 to 2mm.

Was the bike ever rejetted?

Yes.. Yamaha Needle,3rd clip down, 40 pilot, 168 mj. 1 3/4 AS

Which Yammy needle are you running?

Ditto. Check your float height.

Agreed on checking your float level, I get at least 45miles to a tank on mine running at a high B race pace during harescrambles.

Now there's a turn of phrase.

Just wondering if going easy on the throttle is bad for mileage? Counter intuitive but....

I ride in a high gear and im gentle with the throttle, rarely on the pipe.
I get about 35miles (17mpg, 6km/L) to a tank on my re-jetted 2011 250. Granted I have no idea where the squish is but I cant see it getting me another 20miles.

Faster guys over here seem to have no issues with tank range.
The engine will have a peak efficiency band somewhere and it could be higher up the revs meaning you cover more ground for the amount of fuel used?
Eg on the pipe in 3rd vs off the pipe in 4th???

Checked my float height last night and it's within spec of the manual.

I spoke to RK Tek and they were having the same mileage issue. Kelsey had terrible mileage on RK's 300GP as well. He said the squish on the GG300GP is too tight to cut the head but the flame cup is the most inefficient of all manufactures he's seen. He improved his gas mileage and can get nearly 50 miles to a tank riding in Idaho (that's promising).

So RK Tek head, here I come.