What kind of gas mileage are you fellows getting?

The bike is rated for 49. I know it's not reasonable to expect that on a bike that's only 8 years my junior. I'm only getting around 25 MPG. What are you guys getting and any ideas on how to improve it?

 

That's low miles to the gallon, my Maxim-X 700 is regularly getting 56-60 mpg (english gallon), all depending on how I use the throttle

 

That's low. Get your valves in spec, your floats in spec and do an accurate vacuum sync and it should improve.

I get 52-56 from the 550s.

 

I get 40-50 MPG (US) depending on how hard I roll on the throttle. But I tend to ride when in town pretty conservatively and keep the RPMs low for better mileage. However on the the highway I tend to run her out to 8K before shifting, that power however does seem to have some effect on my gas mileage.... However, it seems that around 100 miles no more than 110 I am hitting my reserve. Looking for a 82 XJ750 Maxim tank!

 

I am getting around 50. I have not calculated it, but I go about 100 miles and then put about 2 gallons in it.

 

Smurf, getting 56-60 mpg on a 700x is way better than average mine gets 35-45 tops. I wanna know you secret...

 

I average 35 to 38 on both XS and XJ1100, I have gotten 48 on a 100% highway ride.

 

35 to 45 would be average on my 900.

Keeping it real cool i have done 50.

 

Simple, to get that milage, I don't go above 4000 rpm in any gear, even when I roll the throttle on, I'm getting 52.5 miles to the gallon (english).

I do a 250 mile round trip around every fortnight, and never use all of 15 litres that is put in, in total.

 

I get a little over 50 on my 550RH

 

The secret is he's using a bigger gallon!

The imperial gallon (4.54609 litres (L)) is 20% larger than the United States liquid gallon (3.785411784 L).

Tricky Brits! :wink:

 

I'm pulling in between 48-50 mpg (us). 82 yamaha XJ650

 

Wow - some of you guys are getting really good mileage. I get between 39 and 42 on my 750 Seca. Doesn't seem to matter much how I ride. On my last tank I got 42 and I was hammering on it quite a bit. It looks like the 550's and the 700's are usually in excess of 50. That's pretty good!

 

I get 45mpg highway heavy on the throttle.
The worst i have gotten was 37mpg 2up and about 75lbs of gear @ 80mph cross counrty.

 

I'm getting about 45 now since I have the 4 into 1 on (temporarily). I'm having a baffle made for my 4 into 2 Jardine system. With it installed I get a pretty constant 48-50 mpg.

 

The last tank I was getting 52 MPG...and I'm still tuning!

Kenneth

 

im getting 51mpg (imp) everytime i fill /top up,after a 160km i go to the nearest servo,rarely goes to reserve.

 

Well a few days ago I drive 320 miles +/- a few and wasted just under 6 gallons driving on I-80 from Sun Valley Nevada to Davis CA and back. So I guess that's 53~ MPG Which I wouldn't say is too bad for a 28 year old 750cc bike.

Granted I also wasn't driving aggressively and there is a ton of construction on I-80 so traffic was one lane and moving @35mph for a good number of miles going over the mountains.

 

On the Seca, around town I get 35 - 38. On long rides in the mountains I get 52 - 56. I don't try to ride economically at all. All of this is at 6000' to 10000' elevation.

 

Ok, just driven down to the coast, 2 up, some motorway, mostly A roads at 50mph.

Round trip 106miles, Refilled tank as fuel warning flashing regularly and put in a little over 2 gallon (Imp) works out at 45.6 M/Gall.

Refilled tank and stoping at first set of lights fuel warning flashing, I think a little work is needed?

 

5.7L/100Km. It means I have to fill up after about 300K. I am currently planning a trip from Winnipeg to Victoria to San Francisco and cannot imagine having to do it with the 12 litre tank that most of these bikes have. As it is I will have to fill up over 20 times!

 

I consistently get 41 mph on '82 xj650 maxim. I believe i am running slightly rich but now is not the time to be taking apart the bike

 

I also forgot to mention, those fuel figures of mine are 2 up (358 lb total weight of us both) plus a back bag with 12 kilos in it

 

Even though it will take a lot longer, I think I would be appreciating a break every 200mi/300K.

Also, don't forget you'll have to switch to MPG at the border. ;-)

 

If only there were, like, a poll or something that people could use to answer this very question
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V

 

I am getting 42mpg and that is fully loaded with me and all my books for school for an hour commute twice a day. I really need time to work out the kinks, but it is doing it's job even so.

 

I'm getting ~47 (UK) mpg

but i'm 300 pounds so lol

 

Sorry about that. Lol, hey give me a break, I'm a new guy!

 

That's quite alright!

In fact, the reason I made that poll is because I saw a lot of these same threads, but they all ended up inconclusive....the human brain just can't figure out the averages from a list, and if everyone has to post the thread would be even harder to decipher.

If I could do it again, I would put a bit more effort into it and make it say "Around 30" or "Around 35", as it is someone getting 31 mpg and someone getting 39 mpg are in the same group.

I think most people get in the low 40's, but it has a LOT to do with how and where you drive whether you get just below or a little above the 40's.

Unless you have a 550, they seem to get upper 50's...

I might try to do something to help people search....I'm pretty good at finding what I need, but I know some people have a lot of problems. I think a guide would be beneficial to n00bz and l33t alike. I'd be pretty proud if it got to be a sticky!

 

Re: The 550s--

Back in the day, the magazines said the 550 got 53mpg. I get 52-56; but the 56 is a "purely highway" figure. All-around is probably pretty close to the 53mpg that the road testers got.

 

UPDATE:

Did a genuine (accurate) mileage check over the last three days' worth of (brutal) commuting on my stock 550 Seca:

52.5 MPG.

 

Fitz - is that combined city and highway? My combined is right around 38-39 and I check my mileage every time I fill up. It looks like the 550's are consistently in the 50's and the 750's are right around 40. I am looking forward to getting my 550 running and the gas mileage will be a nice added bonus.

 

Since July 11, I am averaging 38 MPG on a 1983 XJ750 Maxim. That is a lot of city riding, little highway.

 

I forgot to mention, I have the full factory touring package on my bike; fairing, side cases, and tail case. Before I put the touring package on my bike, I consistently got in the 42's.

 

52-55 MPG w/ regular gas, tho most all my miles are highway.

 

It's 60mph Country roads, 90mph freeways, 50mph Boulevards, busy City Streets and Urban Combat Motocross, all stirred together. It's about as "combined" as you can get.

I took readings over three days' commutes and averaged them.

 

Urban Combat Motocross?

Sound familiar!

 

Hmm. When I got the bike one of the things I was really looking forward to was some decent mileage. At first it was pretty poor (low mid 20s per gallon), but it was running rough, so I had the carbs done. I've been doing the mental math every time I've filled up all summer and even though the bike feels great now, I'm consistently getting around 8.5l/100km or ~27mpg. Doesn't really seem to matter whether it's highway or commuting either. Commuting I'm doing ~10miles and rarely getting over 4k rpm.

Seems to me something must be way off. Where's the most likely culprit for that kind of inefficiency?

 

Wow...on a recent 230 mile round tri pup to Lake Lure, the FJ600 got 64 mpg! Heck, my little CB500 got 44 mpg.
I think she's usually in the low 50's, combined riding.

My Dad has his XS650 tuned to the N'th degree and he gets high 50's without even trying and can easily get into the 60's on a hwy. run.

 

Valve adjustment, float levels, carb sync. Or a combination of the three.

That being said, in under 10 miles it's not even getting fully warmed up, and 4000 rpm is the "low end" of the operating range; I always try to keep at least 4K on the tach even in slow traffic.

Keep the RPMs up a bit and see what it does; or get it warmed up and take a longer ride. Fill it first; make note of exactly how far you filled it. Go for a 30 or 40 mile ride, and top off to exact same level. Record exact amount of fuel and use that to get an average for the miles just traveled. It may just be the 'short trips/low RPM/never gets warmed up' that's doing you in, mileage-wise.

 

Vike: If you buy (or already have) a YICS tool, Vacuum sync gauge, and shim adjustment tool I would be willing to rent then off of you once I get to Victoria.

 

I get 33 no matter what I do. But I am doing nothing but city driving. Hate it.

Probably need to do my valves though before I can really say something.

When I rode up to Julian though, my bike got MUCH better fuel economy. The altitude helped out a lot.

 

I don't have a YICS tool, but I think I may just have been given a vacuum sync guage and shim adjustment tool. I'll try to dig through the box tonight. Unfortunately it looks like I won't have a garage at all this year, so could be hard to do any real work.

If I do have the right tools I'd be more than happy to lend them to you.

 

Thank you. After I posted this yesterday I had a quick look through your profile just to see if you had posted about having/needing any of these three items and it seems to me as though we may actually already know each other.

You don't take your classes in the Fraser Building by any chance do you?

 

Indeed. I PM'd you.

 

Tried PMing you back but I'm not sure if it worked as it shows the message in the outbox instead of in 'sentbox'

Trevor

 

40mpg

27.7 round trip to work every day, all freeway @ 55mph = 40mpg on the nose for me.

1982 Maxim 650, 27,000 miles. Just had the carbs cleaned and synched. Valves done a year ago.

 

Wow. Where do you live that the freeways actually roll at only 55? I usually have to run at least 80 to keep from getting flattened, especially in the morning. I'm jealous.

 

^^^^^^^^^^^^^^^^^

I always hated driving from Windsor through Michigan.

I saw a chick once, actually reading a book, not even looking at the road in front of her. I switched to the farthest lane I could away from her cause I KNEW what was gunna happen.

Crazy Michiganers

 

My 82 650 Maxim with plugged YICS gets 52-53 if I drive like a little old lady. If I drive it as a middle age+ kinda guy I get 50. When I visit my GF in Boston & do 75 on the interstate I get 47-48. Never less than that.