6th Gen Average Fuel Mileage

I just saw a drop from 32 to 28MPH. I've been letting the VFR warmup during the cold but can 10-15 minutes make THAT much of a difference?

 

I weigh almost 600 lbs. Can this make difference in mileage/gal? Any slabriders out there tried dropping a tooth or two? Is everyone confidant thier shift points are consistant and not sometimes running in 5th instead of 6th?

I know I never do that....

Do y'all expect the same mileage/gal riding mountain passes of say 5k ft or higher?

I know I run a Fromulator and get a constant 54.46632 mpg.

Final question.. Does this accumulation, entry and analysis of data make it any less money or more fun to ride?

 

ive been having crappy mpg which is shocking compared to the other bikes I have ridden, especially when the UK gets done over on petrol prices anyway.

My SV650S, modified in every possible way imaginable.... £8-9 to fill every 110 miles

The VFR, stock, similar riding costs £17.50 to fill every 135 miles.

Now I know the VFR is heavier and has a bigger engine than the SV did..... but thats a big difference!!!

 

26k miles on the bike, PC II programmer for power, not MPG, running 93+, only get 31-38 MPG on average Approx 175-200 miles out of my tank. I need to reprogram the PC II so I can run 87, and maybe get off the throttle a bit. Oh, and I fill with the kickstand, not centerstand. Sometimes I fill while sitting on the bike, but that's rare.

 

Anyone tried different gearing ratios? I notice stock is 16T and rear is 43T I think. Have seen sprockets as high as 18T for the front and as low as 30T fro the rear....This would obviously be a bit too much rpm reduction, but...

Think I'm going to purchase an 07 RWB 800 Thurs evening. I'm somewhat excited..

 

I love mine. I would recommend the RWB vfr800s7 to any motorcyclist.
Buy it.
then put some hot grips on it.:soapbox::soapbox:

 

41.8 mpg on first tank with stock 16/43 T gearing. Will be trying 18/40 sprockets which should result in 74.5 mph @ 4200 rpm compared to 62 mph at same rpm with stock sprocket set-up. Might be a tad too tall gearing...can always downshift and a supercharger will surely help out the torque issues...
Amazing machine as is however.

 

I have only gassed up thre times so far, but I have calculated 38-41mpg. I'm very easy on her in town and I flog her in the mountains. More time in town but more miles in the hills. I'm pleased with the mileage so far. I put new Pilot Road 2ct's on her right when I got her so I don't know if that makes much difference.

 

1st tank after bike purchase did 41.8...changed front sprocket to 18T and just did 50.5 mpg.

Finally got the Garmin all mounted and going and would appear that the stock speedo on this VFR was quite a bit off...Dont think it got 50mpg after all. With the 18T front sprocket an indicated 70mph was GPS recorded at 73.6..roughly 5% difference. Should have been closer to 12.5%? Anyone else getting big differences between speedo readings and GPS speed readings with stock gearing?

 

I guess mine fits most on here. I've had the bike for ~ 11 months and put ~ 6K on her, and I usually average 40 +/- mpg. I rode a long ride (573 miles in a single day) once and averaged 50 +/- mpg, but that was an exception.

40 is what I usually expect. my old Ninja 650R averaged 50+ no matter how hard I rode her - and I got 70 mpg on the Blue Ridge Parkway. Now that was sweet. I want to take my VFR on that same ride next summer.

 

'06 Interceptor with 9,800 on the clock. 2,500 miles since I got her, average 45 mpg consistently. All my rides are a mix of 10-20% city, 50-60% rural, and 20-40% hwy blasting. I ride fairly conservative but if the oppertunity arises I like to let the VTec roar.

 

The weight factor

I haven't read through the 8 pages of posts - all ready late to work. Has anyone considered how the riders weight affects mileage? I know I get consistent 39-41MPG on my '07 with 32K on her and mostly Hiway driving. I'm pretty conservative (as it's So Cal) on the vtec, but I'm 230 lbs. dry! (not counting the holiday season) :tongue:

 

I am really looking for a way to increase the miles per tank on my 1200f. Any thoughts, everything is stock now but willing to upgrade what is needed. I thought maybe a PC but it sounds like it actually hurts MPG. Any thoughts?

 

I'm quite a bit heavier than when I had my '90 CBR1000F (Mar 92-Dec 96), which gave me 40+ MPG, so you may be right. Also, the Cali-forced clean tech in the stock bike ain't exactly helped matters wither....

 

To add yet another complication to this seemingly endless thread, when you fill up may also have a marginal effect on your fuel efficiency.

Basically we buy fuel using an imprecise measure - volume - rather than its energy content.

Remember filling station fuel is generally stored in underground balanced storage tanks - To stop tanks collapsing as fuel is dispensed, vents allow an equivalent volume of outside air to fill the void. (If its warm outside this air will warm the tank content and when its cold it will cool). Normally stored fuel is a bit cooler than ambient temperature but it can still pick up a lot of heat during transport to site.

The density (and potential energy content) of fluids generally becomes less dense as temperatures rises, and increases as it gets colder.

For petrol this density change is roughly for every five-degree (Celsius) change in temperature, figure about a 0.5-percent change in density. (1)

In practical terms this is not going to make a huge difference. But if you compared filling up 4 gallons at midday on a warm summer day with the air temperature around 30 degree c, compared with filling 4 gallons at the coldest time of night - say 3am with an ambient temperature of around 0 degrees you would see the fuel dispensed contains roughly 3% more energy if you fill up at night - but it will cost you the same.

I have no idea whether the fueling systems in any of the VFR models are sophisticated enough to detect or take advantage of fuel with a higher energy content. But that is perhaps something for another thread.

However if like me you also happen to run a diesel vehicle then it probably will help your Miles per gallon if you routinely fill up when its cold.

(1) Just in case you are really interested - Reference: Engineering Thermodynamics, Volume 1, Spring 2002, Roger A. Gater, Mechanical Engineering, University of Florida


Enjoy - Skimad4x4 - 6th Gen Militia #218

 

I just went through a tank of gas...just got the bike. Bike is an 05 that is 100% mechanically stock. I was doing a lot of stop & go in heavy traffic all week going to classes for work...I usually don't hit much traffic going to work. I got 36MPG but I don't know what type of gas was in the bike when I got it. I filled up with 91 100% gas and am done with my classes so it should be more of a real analysis.

What octane is everyone running?

 

Gater on thermodynamics is of great help. RTFM is best IMO. The very best is putting in more gas as needed and not using the bike as a commuter. Buy a scooter if ya want mileage.

 

mileage is not only for economy...a great deal of mechanics can be told from fuel mileage....but yes, I do want mileage without riding a gay scooter.

 

We never know about one's orientation and we don't ask scooter riders or harleydoods ever.

I agree about the relationship of mechanics and fuel consumption. However, if you take your VFR into the average dealership to get more mileage, chances are by the time they get through with you and your bike your fuel budget for the year may be shot in the ass,

I suppose you could live at sea level for the best mileage and keep it under the double nickel or drop a couple of teeth.

I am near the mountains. At even a couple of thousand feet in the twisties my mileage sucks but it sure is fun.

 

buy the best octane gas you can afford. My Honda only gets the best, my GPZ 500 (uk tawk) really an EX 500 here across the pond, gets mid-test and does better on mileage and top end with that opposed to high cost and lower cost petrol.