M900 mpg

Jam911 · 09-07-2021, 07:16 PM

Hi Chaps
Can anyone give me a real world MPG that I should expect to get for my newly rebuilt M900?
Thanks

Darkness · 09-07-2021, 07:36 PM

It depends how hard you are trying (To go fast, or economically), but 40 mpg is somewhere in the middle of those.

10 mpg is achievable though with sufficient effort!

Mr Gazza · 09-07-2021, 07:49 PM

My M900Sie is a slightly different animal to your (presumably carburated) M900?

There are also two versions of the M900 with different sized valves so there will be at least 3 versions of mpg figures.

I can get 68mpg from my M900Sie on a long run without sparing the horses, the secret being to stay in the top two gears for as long as possible.
That should return a range of well over 200 miles in theory.

I once went as far as it would go until it ran out and returned 54mpg after going 196 miles. That was doing very short local trips and city runs.
Details of the experiment here. http://www.ukmonster.co.uk/monster/s...l+light&page=2

Your mpg will be quite low as the new engine beds in and you get used to it and settle into it's rhythm. You should see well over 50mpg I would have thought, once you can hold higher speeds in top for longer, But it's surprising how much it will vary with different use.

Jam911 · 09-07-2021, 08:57 PM

Thanks guys.
I am just looking for a basic average as I don' t have a working low fuel light at present.

Mr Gazza · 09-07-2021, 09:36 PM

You should be able to go 120-150 miles comfortably.
The worst range I have heard of was 130 miles on a highly tuned S4R whose owner did not know the meaning of frugal!

He carried a can like me to see how far it went.

Jam911 · 11-07-2021, 07:07 PM

I had to push one very heavy M900 for 3 miles through the very hilly Cotswold countryside this afternoon....on the plus side the journey was 100 % carbon neutral.

the lodger · 11-07-2021, 07:19 PM

About 10 miles per litre so a theoretical c140 miles per tank but I fill up after 100 miles to avoid pushing.

Jam911 · 11-07-2021, 07:36 PM

Thanks .

The pushing was due to a fuel leak and not rider error..

Darkness · 11-07-2021, 08:01 PM

Quote:

Originally Posted by the lodger

About 10 miles per litre so a theoretical c140 miles per tank but I fill up after 100 miles to avoid pushing.

Me too. I zero the trip milometer each time I fill up, but have run out before 100 miles!

Mr Gazza · 11-07-2021, 09:07 PM

Wow! carbs are thirsty compared to injection then?

Yorkie · 11-07-2021, 11:15 PM

I agree with the 100 miles fuel check, I might push it to 120 if I’m feeling saucy. The same on my 916, I have had the fuel light pop on at 80 miles and then at 120, I just don’t want to risk it.

Yorkie

Flip · 12-07-2021, 01:03 AM

Yep, agree with the other carby owners- my light usually comes on somewhere between 100 and 120 miles- although it is giving fair warning.

I have run it to 150 on a long distance cruise but I was panicking from 130 as by then I was in the middle of the French countryside.

mickj · 12-07-2021, 11:00 AM

Welcome to the forum Jam911,

09-07-2021, 07:16 PM	#1
Jam911 Registered User Join Date: Jun 2021 Location: Stratford Upon Avon Bike: Multiple Monsters Posts: 288	M900 mpg Hi Chaps Can anyone give me a real world MPG that I should expect to get for my newly rebuilt M900? Thanks

09-07-2021, 07:36 PM	#2
Darkness . Join Date: May 2007 Location: Stockbridge Bike: M900 Posts: 1,984	It depends how hard you are trying (To go fast, or economically), but 40 mpg is somewhere in the middle of those. 10 mpg is achievable though with sufficient effort! __________________ Original and Best since 1993

09-07-2021, 07:49 PM	#3
Mr Gazza Lord of the Rings Join Date: May 2013 Location: Norwich Bike: M900sie Posts: 5,984	My M900Sie is a slightly different animal to your (presumably carburated) M900? There are also two versions of the M900 with different sized valves so there will be at least 3 versions of mpg figures. I can get 68mpg from my M900Sie on a long run without sparing the horses, the secret being to stay in the top two gears for as long as possible. That should return a range of well over 200 miles in theory. I once went as far as it would go until it ran out and returned 54mpg after going 196 miles. That was doing very short local trips and city runs. Details of the experiment here. http://www.ukmonster.co.uk/monster/s...l+light&page=2 Your mpg will be quite low as the new engine beds in and you get used to it and settle into it's rhythm. You should see well over 50mpg I would have thought, once you can hold higher speeds in top for longer, But it's surprising how much it will vary with different use. __________________

09-07-2021, 09:36 PM	#5
Mr Gazza Lord of the Rings Join Date: May 2013 Location: Norwich Bike: M900sie Posts: 5,984	You should be able to go 120-150 miles comfortably. The worst range I have heard of was 130 miles on a highly tuned S4R whose owner did not know the meaning of frugal! He carried a can like me to see how far it went. __________________

11-07-2021, 07:19 PM	#7
the lodger Registered User Join Date: Oct 2019 Location: Chorley Bike: M900 Posts: 160	About 10 miles per litre so a theoretical c140 miles per tank but I fill up after 100 miles to avoid pushing. __________________ Contents may settle !

09-07-2021, 08:57 PM	#4
Jam911 Registered User Join Date: Jun 2021 Location: Stratford Upon Avon Bike: Multiple Monsters Posts: 288	Thanks guys. I am just looking for a basic average as I don' t have a working low fuel light at present.

11-07-2021, 07:07 PM	#6
Jam911 Registered User Join Date: Jun 2021 Location: Stratford Upon Avon Bike: Multiple Monsters Posts: 288	I had to push one very heavy M900 for 3 miles through the very hilly Cotswold countryside this afternoon....on the plus side the journey was 100 % carbon neutral.

11-07-2021, 07:36 PM	#8
Jam911 Registered User Join Date: Jun 2021 Location: Stratford Upon Avon Bike: Multiple Monsters Posts: 288	Thanks . The pushing was due to a fuel leak and not rider error..

11-07-2021, 09:07 PM	#10
Mr Gazza Lord of the Rings Join Date: May 2013 Location: Norwich Bike: M900sie Posts: 5,984	Wow! carbs are thirsty compared to injection then? __________________

11-07-2021, 11:15 PM	#11
Yorkie Anglo-Saxon Warrior Join Date: Aug 2002 Location: North Yorkshire Bike: M900 Posts: 2,485	I agree with the 100 miles fuel check, I might push it to 120 if I’m feeling saucy. The same on my 916, I have had the fuel light pop on at 80 miles and then at 120, I just don’t want to risk it. Yorkie __________________ NO ICE, GUN IT!

12-07-2021, 01:03 AM	#12
Flip Registered User Join Date: Mar 2010 Location: Beachtown Bike: M900 Posts: 2,188	Yep, agree with the other carby owners- my light usually comes on somewhere between 100 and 120 miles- although it is giving fair warning. I have run it to 150 on a long distance cruise but I was panicking from 130 as by then I was in the middle of the French countryside. __________________ You're perfect, yes, it's true- But without me you're only you!

12-07-2021, 11:00 AM	#13
mickj Registered User Join Date: Jun 2018 Location: Clevedon Bike: M1200s Posts: 565	Welcome to the forum Jam911, __________________ Keep the rubber side down. Mick