Horizons Unlimited - The HUBB - XT600 MPG

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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.

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 :)

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).

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.

Add a Needle that is not designed to pass emissions

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

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