The RMX hits reserve at 65 miles - mixture of roads and riding.
The DRZ400e - It was 3/4 full when I got it and only had to fill it up once, but that was because I had to use it as a tanker to fill JT's KTM up twice one night
With standard gearing I was get between 50 to 60 mpg.
Not really sure where reserve kicks in as that depends allot on the terrain - plus I never really pay attention. Whenever I've been riding with my mate on his xr400 our consumption seems to be very close (mine tends to drink a tad more, could be my lower gearing).
10 litre tank (2.64 gallons) - so about 80 - 100 miles till reserve, 120 max to empty, less if mostly lanes.
70+ miles and not hit reserve, I think its an 11.5L tank (poss 13 as I think Hamster said once it has a LR tank) so I guess it must be doing about 35 MPG. That was with 13/50 sprockets, just fitted 14/47 and it feels (suprisingly) a lot higher geared on the road and will now sit really comfy at 55 so am expecting the road MPG at least to improve.....Did struggle up hill in Wacky wood on Sunday though as i could not get it 'in the power' without really slipping the clutch may have a play with the old power valve and wack the 'loony' spring in to see what that does
just done this on the WR. i was running 13/50 to increase chain and sprocket life i have gone to a 14 front to keep the gearing the same i have gone to 54 rear.
13/50 = 3.846 ratio 14/54 = 3.857 ratio 14/47 = 3.357 ratio
divide rear sprocket teeth by front sprocket teeth to get the ratio.
higher ratio means lower gearing.
so a ratio of 2 would mean if the front sprocket was doing 100 RPM(revs per minute) the rear sprocket would be doing 50 RPM.
a ratio of 4 would mean the rear sprocket was only doing 25 RPM
hope this helps .............
BUT if you try to fit a 54 rear with your 14 front i expect your chain wil be too short ........................
Never really bothered to work it out on the CRF 230, if I fill the tank brim full a decent days riding 5 to 6 hours uses about 4 to 5 litres
What i do know however is that when leading a run, the 2 smokes of whatever colour need supplies of Mr Osbournes favorite taxable fluid long before I am down to half a tank.
But thats the beauty of red even the XR 400's last a lot longer than a lot of 250 smokers
My old XL 250R was almost as good on fuel as the 230
JT I am running 14t front 50t rear
__________________
Riding with enthusiasm upon the ragged precipice of disaster
Jt - all you need to do is drop the sprocket on the front 1 tooth and you'll be fine again, well better at least. You'll probably have to put up with that gearing until you've used up the chain & rear sprocket.
just a note in the past ive found a comp 2T does the same tank range as a 450 T4 makes sence as the enduro crowd on 2Ts dont want to be refueling more than the 4T guys in a event so someones worked that out already then : oh and just another thought careful kerry ! a 2T engine going bang with its fuel twice as menytimes in its combustion chamber as a 4T twice its size has the same sort of consumtion ,gearing mmmmm
-- Edited by Lost on Tuesday 25th of May 2010 08:53:48 AM
Yep, and a 2T actually allows some of the fresh fuel to pass straight out the exhaust port along with the exhaust gases - not a very economical system, trying to flush the chamber & re-fill it during the same 2 half strokes with open ports. That's what tuned pipes & back pressure is all about - trying to stop the new fuel escaping I believe.
I hear the next generation of 2 stroke engines are direct fuel injection so will do away with this waste. If they ever appear I'll be in the queue...
Jt - all you need to do is drop the sprocket on the front 1 tooth and you'll be fine again, well better at least. You'll probably have to put up with that gearing until you've used up the chain & rear sprocket.
Yea, got the hang of this gearing malarky now....was 3.86, now 3.35 and if I just plonk a 13T back on the front it will be 3.61 so half way back..
I did check my theory with a 'mate' who shall remain nameless and a normally very reliable parts man in a local motorcikle emporium before I changed the bloody sprockets as well...
Still I did use the ' but lads it's geared to high' excuse with success to save me having to scale Wacky mountain at the weekend and now I feel at least a bit vindicated....
It is peachy on the tarmac now though, really would like to try it with some road rubber on
