R80GS Fuel range.
- Thread starter King Rat
- Start date
solidstate100
Registered user
24 litre tank?
Approx 10 miles per litre as a rule of thumb works pretty well for these. Sounds like you might need a carb rebuild/service/tune up........
Approx 10 miles per litre as a rule of thumb works pretty well for these. Sounds like you might need a carb rebuild/service/tune up........
Thank you. Maybe there is more fuel left in the tank than I think there is! I shall fill up, reset the trip and see whether I reach 220 before it splutters and I need to turn the taps upside down. It could be that I am simply filling up before I need to. If the economy really is way out, I shall give Mickeyboy a visit.
You should have 2 fuel taps on that bike matey. Put the right on reserve and leave the left only on ON. That way when yer bike splutters if you are in traffic you can reach down with your none throttle hand and tun it to reserve. as other chaps says 10miles per ltr is about right. Tuther way of course is not to run out to test but do it by brimming it up on sidestand and go a good distance, brimm it again on sidestand and do yer calculations to give you the miles per ltr. HTHY
I think that when airhead consumption has been discussed in the past, people's figures have been quite significantly different.
These engines are all pretty old now and all the little bits of wear in the carbs, valve train etc can make one engine quite different from the next.
These engines are all pretty old now and all the little bits of wear in the carbs, valve train etc can make one engine quite different from the next.
We shall see!
Thanks for your various inputs.
If I have the RH tap already on reserve, won't that feed fuel to both sides? Is there no balance pipe? I can't remember and having a look, I can't see either!
Thanks for your various inputs.
If I have the RH tap already on reserve, won't that feed fuel to both sides? Is there no balance pipe? I can't remember and having a look, I can't see either!
There is no balance pipe between either lobe of the tank as such. The fuel lines should fill either float bowl via a cross pipe that threads through the lower air box area. If one tap is off or not turned to reserve whilst the other one is, you’ll still have some fuel in one side when the other runs out.
Errmm, what a strange suggestion. You can have both taps turned to on and still reach down with your left hand to turn on the reserve.
Thank you. Maybe there is more fuel left in the tank than I think there is! I shall fill up, reset the trip and see whether I reach 220 before it splutters and I need to turn the taps upside down. It could be that I am simply filling up before I need to. If the economy really is way out, I shall give Mickeyboy a visit.
How are you reaching the conclusion that you're only managing 160 miles when you don't seem to be running the bike until it needs the reserve taps turning on ?
Beemerboff
Registered user
My R100 GS has done 432 km to dry, and it took 22 1/2 liters to fill it.
So there was still 1 1/2 liters below the top of the reserve tap inlet tubes.
That is just on 20 km/L / 56 mpg and was just after a full tune, when it drops to 16 km/L I know it is time for a service and tune.
And needles and needle jets and-------!
So there was still 1 1/2 liters below the top of the reserve tap inlet tubes.
That is just on 20 km/L / 56 mpg and was just after a full tune, when it drops to 16 km/L I know it is time for a service and tune.
And needles and needle jets and-------!
B Murr
Registered user
So from that I'd guess if you were stuck after running out of both reserves that a bit of tilting and sloshing of the tank would get most of one sides 1.5 litres over to other side and therefore fill that side above the reserve tube level allowing you to make progress for another few km to find a filling station ( or a more scenic place to curse and swear at your stupidity ).
It sounded awefully low and light, obviously not as low and light as it can go!
I don't think I shall be getting down to the dregs to the point I could read the tea leaves!
I just noticed this question and it struck me!!
How many litres are you putting in for the 160 miles??
X litres / 4.543 = Y Gallon
160 / Y = mpg ???
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