HWY millage worse?

[rd400canuck]

Hi guys,

I drive from Ottawa to a town exactly 100 km's from me and it takes 8.5 liters. That leaves 2.5 liters before reserve.  That leaves  29.5 km's in the tank for a total of nearly 130km's per tank in the hwy..

I'm almost 100% sure that driving around town I can get to 160km's easily.

Is it possible that HWY driving at a steady 5500 rpm (100kmph) can suck more gas than bombing around town and talking it easy?

[Jspooner]

Hi guys,

I drive from Ottawa to a town exactly 100 km's from me and it takes 8.5 liters. That leaves 2.5 liters before reserve.  That leaves  29.5 km's in the tank for a total of nearly 130km's per tank in the hwy..

I'm almost 100% sure that driving around town I can get to 160km's easily.

Is it possible that HWY driving at a steady 5500 rpm (100kmph) can suck more gas than bombing around town and talking it easy?

absolutely

[Dvsrd]

Hi guys,

I drive from Ottawa to a town exactly 100 km's from me and it takes 8.5 liters. That leaves 2.5 liters before reserve.  That leaves  29.5 km's in the tank for a total of nearly 130km's per tank in the hwy..

I'm almost 100% sure that driving around town I can get to 160km's easily.

Is it possible that HWY driving at a steady 5500 rpm (100kmph) can suck more gas than bombing around town and talking it easy?

5500 rpm seems a bit high at 100 km/h , especially if it is an INDICATED 100 km/h on a stock Speedo. I prefer  around 5000 rpm at an actual 100 km/h on my 350. Which gives 170 at the 8500 rpm redline.

[m in sc]

thats pretty normal on stock rd. ~5500 @ 65 indicated.

gearing helps as said.

[rd400canuck]

Yup, its 100kmh as per google maps which is very accurate for me as I see in my truck.

Ill look into dropping the rpm by 500 next summer. From the get go I felt the bike could benefit from higher gearing. I find it too revvy on the hwy.. like I wished it had another gear.

[SoCal250]

If you're #1 goal is fuel mileage you're on the wrong type of motorcycle. 

[rodneya]

Add some engine mods and watch the mpg plummet. Worth it though

[SoCal250]

Add some engine mods and watch the mpg plummet. Worth it though

Exactly!   Who cares about fuel consumption?

[Czakky]

I get a solid 35 mpg on my 350 About the same as my 1100cc FI bike.

[rd400canuck]

lol ya wrong bike for mpg 

but its not be mpg im worried about trying to improve.. Ive just never seen a machine get worse millage on the hwy compared to around town. just couldn't believe my eyes

[Alain2]

My RD400s average 8-10 L/100km. (30-24mpg)

[Striker1423]

lol ya wrong bike for mpg 

but its not be mpg im worried about trying to improve.. Ive just never seen a machine get worse millage on the hwy compared to around town. just couldn't believe my eyes

It's a 2 stroke. Nature of the beast.

[SUPERTUNE]

Believe it or not... Proven, My STG 2 RD400's builds get close to 38 miles per gallon on the highway at 65-70 mph. (with a few hit it hard race your buddy and passing cars)
16-39 gearing, YZ85-VF reeds, TM34's on Uni-Pods, Vape CDI
Chuck

[Hardy]

I've found two strokes to always be heavy on the juice. My RD400 is about 10/L per 100kms and my Bridgestone 350 is up around 12L per 100km!

Hardy

[m in sc]

yeah, it all depends where in the rpm you are at hwy cruising and how well its tuned.

believe it or not, i get consistent 33-35 on the grom with a 250 quad motor, which is way better than i expected. my lc gets somewhere in the high 30's as well. strong ignition helps a bunch here as well.