I have read of others MPGs being in the 40-50 mpg range.
I have been riding my FJ to work for nearly a month straight now, and am only seeing 33-34 mpg.
This is even after changing sprockets to 18/39 over the old 17/40.
When the bike was stock I was seeing right around 38-39 MPG with a 40 once in awhile.
I'm only running a little less than 40 miles per day and my carbs have been re-jetted by RPM, (and perform great by the way!).
I feel the lack of more distance riding and staying out of the Kookaloo juice may help the situation, but then what the hell would be the fun in that!
So am I getting a reasonable MPG for my current riding circumstances?
I was expecting at least a slight increase in MPGs after the gear change.
Or do you think that the FJ is just running that much better and I just can't stay out of the throttle, (which I admit that I do have a problem with.!)
I usually cruise at 75-80 MPH and and overtake most everything I meet on the road.
Leon
That is about what I was getting at the same driving speeds.
I usually see 40-41 around town, and on longer rides........doesn't seem to fluctuate much.
I just filled up today, and saw 44mpg on my last tank, which most of it was my ride in the mountains last weekend.........
I used to get about 38 in normal/mixed with the orig engine. Today I got 38 riding up to Tahoe with daughter and luggage on the 1349cc/FCR39 beast.
BTW Pat - they ran great from 100ft to 8000ft+... Less power at altitude, like any normally aspirated engine, but still plenty to make the front end very light passing in 6th. I think you might be able to run these.
Frank
Quote from: Flynt on August 31, 2012, 09:50:30 PM
I used to get about 38 in normal/mixed with the orig engine. Today I got 38 riding up to Tahoe with daughter and luggage on the 1349cc/FCR39 beast.
BTW Pat - they ran great from 100ft to 8000ft+... Less power at altitude, like any normally aspirated engine, but still plenty to make the front end very light passing in 6th. I think you might be able to run these.
Frank
Frank, you big fibber, the FJ, as much as we want, does not have a sixth gear... :ireful:
leakdown test? last valve adjustment? use any oil between changes?
.... filling up at the same pump every time?
how many times do you see triple digits per tank? :biggrin:
KOokaloo!
I have gotten 50mpg when I had to be a good boy. Normally not that good but allot more fun.
Kurt
Quote from: FJmonkey on August 31, 2012, 09:53:14 PM
Frank, you big fibber, the FJ, as much as we want, does not have a sixth gear...
Randy didn't tell you about the 6 speed upgrade? :rofl2:
Too much time on the Beemer I guess... Ok, 5th with 18/42. :flag_of_truce:
Frank
Quote from: Flynt on August 31, 2012, 10:20:42 PM
Randy didn't tell you about the 6 speed upgrade? :rofl2:
Too much time on the Beemer I guess... Ok, 5th with 18/42. :flag_of_truce:
Frank
Just keeping you honest Frank, nothing but love for you.....
Quote from: Flynt on August 31, 2012, 10:20:42 PM
Quote from: FJmonkey on August 31, 2012, 09:53:14 PM
Frank, you big fibber, the FJ, as much as we want, does not have a sixth gear...
Randy didn't tell you about the 6 speed upgrade? :rofl2:
Too much time on the Beemer I guess... Ok, 5th with 18/42. :flag_of_truce:
Frank
Or 18/39... Remember E=mc^2 (c being velocity of the FJ, almost like light, in this case). The energy of
speed rises at the square of mass.
What I'm trying to say is... It's always better to go
faster, even for a battle tank like the FJ! :yahoo:
Quote from: racerman_27410 on August 31, 2012, 10:04:48 PM
leakdown test? last valve adjustment? use any oil between changes?
.... filling up at the same pump every time?
how many times do you see triple digits per tank? :biggrin:
KOokaloo!
LEakdown test- No
Last valve adjustment- This spring.
No oil used between changes that I have noticed
No, I do not use the same pump every time.
My last tank ran me 170 miles and the red fuel light was on for the last 10 miles.
Leon
More polishing might help. :rofl:
Kurt
Quote from: yamaha fj rider on August 31, 2012, 11:46:35 PM
More polishing might help. :rofl:
Kurt
I heard that smooth, polished surfaces create more drag..................It's gotta be dimpled, like a golf ball......There needs to be some boundary-layer attachment to a rough surface to keep the air flowing over smoothly......Thats why I leave my bike dirty most of the time........or all my vehicles for that matter.
Or it could be that I'm just too lazy to wash them. :sarcastic:
Leon, you need to dimple your FJ to get better mpg's............Next hail storm, I'm pushing mine outside....
Quote from: Firehawk068 on August 31, 2012, 11:56:45 PM
Quote from: yamaha fj rider on August 31, 2012, 11:46:35 PM
More polishing might help. :rofl:
Kurt
I heard that smooth, polished surfaces create more drag..................It's gotta be dimpled, like a golf ball......There needs to be some boundary-layer attachment to a rough surface to keep the air flowing over smoothly......Thats why I leave my bike dirty most of the time........or all my vehicles for that matter.
Or it could be that I'm just too lazy to wash them. :sarcastic:
Leon, you need to dimple your FJ to get better mpg's............Next hail storm, I'm pushing mine outside....
That would be counter-productive to everything I have done up to this point.
I'll keep the 34 MPGs over any dimpling! Thanks. LOL!
Leon
Quote from: Firehawk068 on August 31, 2012, 11:56:45 PM
Quote from: yamaha fj rider on August 31, 2012, 11:46:35 PM
More polishing might help. :rofl:
Kurt
I heard that smooth, polished surfaces create more drag..................
this is true, I used to race r/c one meter sailing yachts and one of the common mistakes by the new guys was to polish their hulls, you need to break up the surface tension between the water and the hull, polishing makes the water grab the hull.
I suspect the reason my FJ is so dirty is that every time I wash it goes slower :yahoo:
BTW I get shitty gas mileage but it took me 20 dyno runs to get there, now the fuel gauge is disproportionately connected to the twist grip.
I start looking for fuel after about 250kms (so probably get 300+ out of a drained tank) , your getting 100 or so on top of that I would be very happy..
Last fill up I was about 140-150 miles on that tank but there was some time spent at 130-135 mph. Gas goes fast at a ton plus.
Kurt
I don't usually bother about MPG but on a recent run with friends i began to take a bit of interest, only a bit though.
Now then, we were both on XS1100's, and filled up from full, both after a 103 mile run. My friend put in 11 litres and i put in 19 :negative:. So i got home and adjusted the carbs and went out for a run and measured the result which was to me an amazing 48 MPG. Result. There were some factors, but that is irrelevant.
So a couple of weeks later i'm out on my other XS and measured the MPG at 39 MPG. Not a great deal in it yes?
Now the only thing i can put it down to is the size of the rear wheels. One, the 48 MPG being a 17inch and the other, the 39 MPG, a 16inch.
OK, there are a few other contributing factors between the two bikes, but nothing major.
So the point i'm trying to make, could it be that the various MPG figures for the FJ's is the use of different size rear wheels and obviously the difference between the sprocket sizes.
I'm going out on my XJR1200 this weekend, never bothered to work out the MPG on that either, but i will this weekend, and that is running a 17inch rear wheel, stock FJ1200 3CV carbs and standard sprockets.
Tire and wheel size does not make that much difference. The 16" wheel takes a taller tire. The diameter of a 150/80/16 is 25.45 inches. A 170/55/17 is 24.35 and 180/50/17 is 24.08. The larger wheel is getting slightly smaller. Check out www.gearingcommander.com (http://www.gearingcommander.com) where you can play with wheel/tire/sprocket combinations.
Quote from: FJ111200 on September 01, 2012, 05:24:26 AM
I don't usually bother about MPG but on a recent run with friends i began to take a bit of interest, only a bit though.
Now then, we were both on XS1100's, and filled up from full, both after a 103 mile run. My friend put in 11 litres and i put in 19 :negative:. So i got home and adjusted the carbs and went out for a run and measured the result which was to me an amazing 48 MPG. Result. There were some factors, but that is irrelevant.
So a couple of weeks later i'm out on my other XS and measured the MPG at 39 MPG. Not a great deal in it yes?
Now the only thing i can put it down to is the size of the rear wheels. One, the 48 MPG being a 17inch and the other, the 39 MPG, a 16inch.
OK, there are a few other contributing factors between the two bikes, but nothing major.
So the point i'm trying to make, could it be that the various MPG figures for the FJ's is the use of different size rear wheels and obviously the difference between the sprocket sizes.
I'm going out on my XJR1200 this weekend, never bothered to work out the MPG on that either, but i will this weekend, and that is running a 17inch rear wheel, stock FJ1200 3CV carbs and standard sprockets.
The OD between the wheels is neglegible. Certainly the gearing will make a difference but not by the sort of margin in your example.
My bike returned 52mpg ( Imp. gals ) for about a year, has dropped as low as 38 and for the last 12 mths has hovered around 46. No gearing changes were made.
The FJ is a toy and within reason as long as it's running well and pulling hard I don't really care.
As someone here put it beautifully - "riding an FJ for economy is like going to a prostitute for a hug"
:rofl: :rofl: :rofl: OK, i won't bother then. :rofl2:
I'm getting anywhere from 34-40 mpg with my 85 1100. and I ride double with my wife most of the time. I weigh 195 and she's like 135. Today was the worst mileage I've gotten so far with it and that was 34.
Quote from: ribbert on September 01, 2012, 06:23:12 AM
<...>
As someone here put it beautifully - "riding an FJ for economy is like going to a prostitute for a hug"
:good2: Great line...
I do keep track of my fuel consumption as a diagnostic tool. It was handy when I was working on the carbs.
FWIW: with the 18 / 49 sprocket mix I was averaging around 6.4 l/100km (36.2 mp(U.S.)g). Now, with 18 / 40 I'm seeing 5.7 l/100km (41.2 mpg).
When my carbs were in bad shape I was using 8 l/100km (29.4 mpg)
Quote from: FJ111200 on September 01, 2012, 09:13:06 AM
:rofl: :rofl: :rofl: OK, i won't bother then. :rofl2:
Yeah well i did bother, and it's working out at 45 MPG (UK). I'm happy with that.
bad mpg is the price for having fun, I'm willing to pay the price :yahoo: