Horizons Unlimited - The HUBB - XT600 MPG

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- - XT600 MPG - Your figures please. (https://www.horizonsunlimited.com/hubb/yamaha-tech/xt600-mpg-your-figures-please-31829)

*Touring Ted*

24 Dec 2007 21:13

XT600 MPG - Your figures please.

OK, miles per litre but you know what i mean :)

Im currently getting near exactly 10 miles per litre (16km per Litre) whilst travelling in Argentina on the smoother clear roads with a fully laden bike.

This is travelling at 60-65mph (100-110 kmph)

It uses marginally more with the wind or higher speed and less when im chilling on the bad roads etc

Out of interest, what are your XT600's doing ????

Martynbiker

24 Dec 2007 21:20

XT600 mpg

17k per L on an XT600 1989 2KF mostly offroad n mountains. The only load is a 22 stone rider plus tools!

Just to add to my post here, just been for a 160km jaunt into the Mountains today (Xmas Day) 120km offroad and 42km tarmac, final figures Fuel used 7.86 Litres which is by my reckoning 20.93Km to the Litre or 94.63Km or 59.1 Miles per Gallon Im well chuffed!

dallastx

25 Dec 2007 09:15

Hello, y'all!! I got an average of 22/23km on a liter fuel, on backroads. On highway use a little less(1:20). Average speed is: backroads 80/90kmph, highway 110/120kmph. This all even with a K&N airfilter and a CRD-exhaust. My weight is 95kg, I run panniers on my bike(H&B). Hope you can use this info. Greetings, Hans van Langen.

Allie_Smit

26 Dec 2007 07:29

k/liter?

worst ever: 15 km/l - best ever: 28 km/l!! old 34L model. 1985.

greynomads

26 Dec 2007 16:07

XT600Z 3AJ model, 2-up and very heavily laden - average around South America has been 24 km/litre with a worst of 20 on gravel mountain roads in Bolivia and a best of 28 with the wind behind us. Maximum speed is usually 70 - 80 kph.

*Touring Ted*

26 Dec 2007 16:41

hmmmmmmmmmmmmm

Why is my economy so bad !!

My bike is a 2003 with only 6000 miles. Well services and smooth runner.

I usually cruise at 100-110 Kph.

You guys with better economy. What speeds do you ride at ??

mollydog

26 Dec 2007 18:15

Took me a year of screwing around

Martynbiker

26 Dec 2007 18:22

its all in the wrist Dude!

Quote:

Originally Posted by tedmagnum (Post 165119)

Its easy really.. that throttle is a tap, the more you open it, the faster the fuel flows, also don't put it in too high a gear.... I hardly ever get into 5th gear unless its tarmac and quick blasts of 100-110kmh.
But get used to keeping that throttle closed down a bit more and use the gears properly (I'm not trying to say you don't know how to ride, just don't over rev and don't Labour the engine and she will reward you)
i stick to about 90-95kmh about 50-55mph, got used to that speed in the USA it also suits the XT and my pocket!

Martyn

*Touring Ted*

26 Dec 2007 18:23

Quote:

Originally Posted by mollydog (Post 165132)

Is your bike stock? Were those who commented on MPG riding stock bikes too? Different jetting/air box set ups changes everything.

And don't forget altitude. Flat, sea level roads mean fantastic MPG. Up high you will suck gas. Consider temps too. Hot weather= Poor MPG Cold Weather= Better MPG.

Normally a Dyno-Jet kit (or similar) really can make a difference, not only in performance but in economy. Opening up the air box and using a performance
Needle is the key to it. Seems counter-intuitive, but a well set up bike with a Dyno-Jet kit can achieve better fuel economy than stock AND perform better in the bargain.

The trade off is you'll be doing more frequent air cleaner servicing, which is no big deal at all IMO and well worth the trade off.

Took me a year of screwing around with every possible jetting combination known to man to figure this one out. Just because the MAIN jet is bigger does not necessarily mean you're MPG will go down. Please don't ask me to explain this one!

Patrick:Beach:

I understand jetting and tuning as much as anyone...

I set up a perfect fuel/air mixture back home in the UK with my Quill can (road legal) using an exhaust diasgnosics guage at my dealership.

I probably ride to fast for the weight im carrying.

Martynbiker

26 Dec 2007 18:34

im gonna disagree with Mollydog.......oerrrr!

Quote:

Originally Posted by mollydog (Post 165132)

Took me a year of screwing around with every possible jetting combination known to man to figure this one out. Just because the MAIN jet is bigger does not necessarily mean you're MPG will go down. Please don't ask me to explain this one!Patrick:Beach:

You may not agree Patrick, but Yamaha really DO know what they are doing with the Jetting on their Bikes. Every Biker I have ever spoken to who has \fiddled with jets and needle settings on his XT has as regretted the decision, as you said above IT TOOK YOU A YEAR, and i KNOW from your posts you were not the last in line when brains were handed out.

SO Unless you have a Rolling Road Dynanometer set-up in your Garage, and lets face it thats gonna be very few of us...... just fitting a Dyno-Jet kit can be worse than useless. each engine is different, they really should be set up on a RRD. what makes you think that in your garage at home with a Bottle of Molson in One hand and a screwdriver in the other you can do better than a factory that spent hundreds of thousands on R&D?

bolla

26 Dec 2007 20:18

When you guys check your miles/Kms are you using the trip meter on the speedo or using a GPS. I guess the GPS will be more acurate but dont know how much difference it will make to the overall reading.

Martynbiker

26 Dec 2007 20:56

it makes no difference.......

Quote:

Originally Posted by bolla (Post 165168)

As long as you always use the SAME measuring device. and I prefer the Bikes speedo as it runs from the wheel which is in direct contact with the ground 99.9% of the time ( KTM owners can disregard this statement as the front wheel is usually in the air 15% of the time.)) and therefore is "accurate" to a given degree. the GPS on the other hand is accurate to within 10M.

*Touring Ted*

26 Dec 2007 21:05

Quote:

Originally Posted by bolla (Post 165168)

My GPS reads about 2-3 mph under my speedo which is normal as all bike speeds over read..

Martynbiker

26 Dec 2007 21:12

Damn!

Quote:

Originally Posted by tedmagnum (Post 165173)

My GPS reads about 2-3 mph under my speedo which is normal as all bike speeds over read..

so you mean to say I wasn't doing 165Mph when I nipped off for a test ride on the Hayabusa went it first came out?:(
Now I've got to go and do it all again!

Matt Cartney

27 Dec 2007 13:48

This is slightly rough, but I reckon to get at least 400km from my 23 litre acerbis tank. This is a mixture of riding, but mostly tarmac. I never ride with fuel economy in mind so tend to thrash along fairly quick.

This works out at a little more than 17.5km per litre.

Ted, my bike is also a 2003 model, so it seems the model plus our riding style might be the answer!

Matt :)

leigh

28 Dec 2007 12:01

Seems a bit thirsty

I averaged 20 kpl in Argentina, TT600RE fairly loaded with wide ally boxes, didn't get in to 5th much due to the wind. Max speed would have been 110kmh generally 90-100.
As I understand it the second stage of the carb (YDIS) kicks in around the 90 kph mark when cruising due to the throttle position you require to pull this speed. Try slowing down a bit and see if it gets better. Remember it's a marathon, not a sprint.

Matt Cartney

28 Dec 2007 13:24

Sorry, forgot to say that's fully loaded with wide boxes, massive holdall and steering fatty.

The big square box thing is a good point, I have often wondered why, particularly high end boxes like metal mules etc, aren't more streamlined. I wonder if it would be possible to work out the fuel saving from having streamlined boxes on say, a 10,000km journey over having monster square ally boxes sticking out like sails?

It's one advantage having a monster top box and eenie weeny soft panniers would have, despite the stability issues.

Matt :)

Gits	28 Dec 2007 13:26

When I ride on small roads with gravel I can go about 22-23 km/liter. Depends on how much I use my right hand of course;-)

When I ride on tarmac 95 km/h I can go about 17-18 km/liter.

I recently bought a GPS and checked my speedometer. Actually it shows 1-2 km/h less than the GPS (Garmin Nuvo 200). I think it is because I hace offroad tires on (TKC80).

Bonfireboy

29 Dec 2007 12:02

Mpg!!

Just worked mine out this is for me (about 80kg) riding a 2003 XT with no gear onboard piper cross filter and predator system. I usually get about 22 miles per litre but I tend to ride quite hard. It works out at around 63 MPG which is not that bad.

mollydog

29 Dec 2007 18:26

Add a Needle that is not designed to pass emissions

mollydog

29 Dec 2007 18:52

And YES, all bikes are different....but the priciples are the same.

Martynbiker

29 Dec 2007 19:41

yes, but the point i was actually trying to make patrick........

Quote:

Originally Posted by mollydog (Post 165539)

No worries marty:scooter:

Once one element is altered....well....you know! :eek3:

when a punter starts fiddling with a Dyno-Jet kit on a stock bike you know he is headed for trouble.

In this area there are no half way measures if you want things to go well.
But as I said above.....A free flowing exhaust and open intake are where you have to start. So my point is....if you balance things right...you can still get decent fuel economy even on a bike with MUCH more agressive jetting because you've countered this with much more air and a freer exhaust. Now you've got the bike Yamaha wishes they could have built.

You can't really have one element without the rest. And ThIS is what i've figured out through trail and error....and really knew long ago but had forgotten. :stupid:

And YES, all bikes are different....but the priciples are the same.

These motors have SO MUCH potential in them it's simply unbelievable.

I'm bypassing all this CV carb aggravation on my DR and am now going with a
FCR 39mm Keihin pumper carb off a YZ450R. A whole new world....and still decent fuel economy....even with the front wheel in the air!

Patrick:scooter:

The point I was trying to make but got lost somewhere, I have the attention span of a.......was YES, actually, we can improve, by trial and error, done it myself, and like you took ages and pulled out too many hairs and threw a few spanners across the workshop in frustration I can tell you.

Now, IF we have access to a Rolling Road Dyno, and some jets, and a pipe or two, the whole process can be done in a day with Visible, Tangible, Printable results! PROOF!! proof for you mates down the pub that say. my XT now put out 8 Bhp more since Ichanged to K&N filter and a new shiny "akrapovik/staintune//supertrapp" exhaust and you can say...no. it doesnt. heres the proof. on paper.
and it will not have taken you a year ti find out.......

Martyn

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