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Fuel economy

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Jameshambleton
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Fuel economy

Post by Jameshambleton on Mon 05 Oct 2015, 6:07 pm

I've just hit reserve for the first time and I had done 120 miles is this what I should be expecting or is there something wrong?
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ashcroc
the 900
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Re: Fuel economy

Post by ashcroc on Mon 05 Oct 2015, 6:11 pm

That sounds low.  I usually hit reserve at around 180 miles on general commuting with a few high revs thrown in.

Is your bike restricted? That can play havock with fuel economy.
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Jameshambleton
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Location : Bedale, North Yorkshire

Re: Fuel economy

Post by Jameshambleton on Mon 05 Oct 2015, 6:13 pm

@ashcroc wrote:That sounds low.  I usually hit reserve at around 180 miles on general commuting with a few high revs thrown in.

Is your bike restricted? That can play havock with fuel economy.

It's restricted to 47bhp and I've been doing a few high revs, I normally change up about 6000ish revs
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steady Eddy
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Location : Ellesmere Port

Re: Fuel economy

Post by steady Eddy on Mon 05 Oct 2015, 6:20 pm

are you filling her up on the side stand?
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Jameshambleton
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Re: Fuel economy

Post by Jameshambleton on Mon 05 Oct 2015, 6:22 pm

@steady Eddy wrote:are you filling her up on the side stand?

Just filled her up on the side stand and I filled up 16.99 litres.

sullivj
the 900
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Location : Gatwick

Re: Fuel economy

Post by sullivj on Mon 05 Oct 2015, 6:28 pm

Filling up on the main stand, I get 180 before reserve.
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steady Eddy
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Location : Ellesmere Port

Re: Fuel economy

Post by steady Eddy on Mon 05 Oct 2015, 6:31 pm

must say im surprised you got 17ltrs in on the sidestand, makes me wonder what the difference in capacity is sidestand to centrestand?

Know i ran to reserve at 130ish when i first got my cb cause i "filled" her on the sidestand,Try the centerstand next time and see how that goes.
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trevor machine
the 900
the 900

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Re: Fuel economy

Post by trevor machine on Mon 05 Oct 2015, 6:31 pm

Yeah ton eighty here as well. Usually fill up on main too, unless there's loads of diesel around.
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Celt500
Mothra the Radioactive
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Re: Fuel economy

Post by Celt500 on Mon 05 Oct 2015, 7:33 pm

Yep, 180 here too.
I always fill on the centre stand right up to the bottom of the filler neck.
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wornsprokets
the 900
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Location : dublin

Re: Fuel economy

Post by wornsprokets on Mon 05 Oct 2015, 8:48 pm

I get about 190ish .bike filled up on centrestand and up to neck.


Last edited by wornsprokets on Mon 05 Oct 2015, 9:46 pm; edited 1 time in total
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Jameshambleton
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Location : Bedale, North Yorkshire

Re: Fuel economy

Post by Jameshambleton on Mon 05 Oct 2015, 9:25 pm

Damm it looks like I'll need to keep an eye on this. 
I'm hoping it's more the fact of the bike hasn't moved properly in about a year and I'm a little right hand happy sometimes going a lot faster than what I should be. My bike has a K&N air filter, 47bhp restrictor, delkevic down pipes and a baffled Beowulf exhaust. 
After this week of doing a 44 mile round commute if the problem stays the same I'll check the spark plugs as I only put in new ones a short while back to see what colour they are. I'll also be checking the jetting of the carbs with my dad and see what happens with them.
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Beresford
the 900
the 900

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Location : not that far from Kirkistown

Re: Fuel economy

Post by Beresford on Mon 05 Oct 2015, 11:51 pm

To mix units - just for the confusion - my bike seems to do 10 miles per litre all the time. It will do better on long open runs, but most of my use is sub-urban running around.
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steeeve66
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Location : Greenhithe

Re: Fuel economy

Post by steeeve66 on Tue 06 Oct 2015, 5:54 am

I get over 200 per tank - usually 205. Most of my riding on the CB is my commute in to London - so mostly 50/60 mph and 30mph roads. It's made very little difference if I filled upright or on the side stand and to be honest I can't see that making a big difference?
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ANDYC
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the 900

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Re: Fuel economy

Post by ANDYC on Tue 06 Oct 2015, 8:29 am

I get about 220-230 before I start thinking about reserve.
I do fill her up whilst upright.
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teamster1975
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Re: Fuel economy

Post by teamster1975 on Tue 06 Oct 2015, 11:00 am

Like Andy I get to about 210-220 before reserve and I weigh about 14 1/2 stone, I have always sat on the bike holding it upright when I fill it.
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phorx999
Crotch Rocketuer
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Location : Sheffield

Re: Fuel economy

Post by phorx999 on Tue 06 Oct 2015, 11:51 am

i get 200 until reserve with spirited riding Very Happy but i have a throttle restriction, Likely the restrictor washers, filter and pipes f@cked with your fueling, i usually sit on the bike when refilling.
If you haven't already use Redex in a full tank, it may help
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eternally_troubled
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Re: Fuel economy

Post by eternally_troubled on Tue 06 Oct 2015, 1:16 pm

I get about 160 - 170 per tank (around 45 mpg or 10 miles per litre) but that is mainly going to work through the traffic in town - I get more on a long run (nearer 200).
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jimbobs63
the 800
the 800

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Location : London, UK

Re: Fuel economy

Post by jimbobs63 on Wed 07 Oct 2015, 4:36 pm

Hi,

Just my tuppenceworth:

London Commuting is by far the biggest proportion of the mileage I do. I fill up on the side stand, and go about 120 miles on about 13 litres, i.e. not waiting for the fuel to get down to reserve.  When I do wait and have to switch to reserve, I get to around 135 miles.  My mpg works out at around 40-45 as well, but that is very much stop-start when having to filter past slow moving London traffic.

I find that filling up on the side stand means that the capacity from reserve is around 14-15 litres, whereas on the centre stand I can get more like 16-17 litres in when just onto the reserve.

Jim
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badseeds
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Re: Fuel economy

Post by badseeds on Wed 07 Oct 2015, 5:10 pm

Filling up with the bike on the side-stand or mainstand doesn't make a huge difference, maybe 20-30 miles, though I usually fill mine up whilst sitting on it. 120 miles is excessively low. My first CB500 went on to reserve at 160ish miles; coming from a Blackbird I didn't think twice about it, but fitting a K&N air filter and NGK iridium plugs saw that jump to 190. I was amazed.

My high-mileage CB500 still does over 200 miles before reserve and as you know, I don't ride like an old woman.




What's the air filter like? Is your bike missing the bung on the air filter drain tube? No. 11 on here:

If it is, the bike will suck road shite into the air filter and clog it up in no time, affecting fuel consumption. I've seen this before....



Last edited by badseeds on Wed 07 Oct 2015, 7:09 pm; edited 1 time in total

sullivj
the 900
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Location : Gatwick

Re: Fuel economy

Post by sullivj on Wed 07 Oct 2015, 7:06 pm

Nice video Badseeds. Impressive economy considering your 'progressive' riding style Laughing
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badseeds
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Re: Fuel economy

Post by badseeds on Wed 07 Oct 2015, 7:13 pm

@sullivj wrote:Impressive economy considering your 'progressive' riding style Laughing

It is, innit. Especially considering the mileage. I reckon the OPs bike just needs a check over; these bikes are as hard as nails which is why I, we and everyone loves 'em.
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wornsprokets
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Location : dublin

Re: Fuel economy

Post by wornsprokets on Wed 07 Oct 2015, 9:50 pm

Are u getting same mpg from new bike badseeds?
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badseeds
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Re: Fuel economy

Post by badseeds on Wed 07 Oct 2015, 9:55 pm

Not at first. The run back from Enfield where I picked it up from, about 130 miles, saw it go on to reserve at 165 miles. I was caning the spuds off it, though.... Best I've had so far is 195 before reserve, but I gave it fresh oil, filters and plugs when I got home as it came with no history.
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mcalvert39
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Re: Fuel economy

Post by mcalvert39 on Thu 08 Oct 2015, 3:50 pm

Do you ride with the box on all the time?
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badseeds
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Re: Fuel economy

Post by badseeds on Thu 08 Oct 2015, 5:14 pm

@mcalvert39 wrote:Do you ride with the box on all the time?


I haven't fitted one to the new bike yet, but yes. Even my TT mountain pass included a topbox. I haven't really noticed much difference in handling with, or without, but I would consider myself to be fairly ignorant anyway Wink

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