Improving mileage?

My 750 maxim gets a steady 44 mpg i keep speed down cruise around 45 -55 mph most of the time use middle grade gas



82 maxim 21k miles daily rider

 

I get on an average of 45 MPG on my XJ700...and have seen tanks get 55 mpg....I always burn 93 octane...but found that some gas brands are better than others....I avoid using the "Green" 10% ethanol in my bike...I found it doesn't run as smooth and get as good mileage

 

OH, I weigh about 150 pounds. I guess that can make a difference

 

i have an 83 750 midnight and i get close to 45-48 mog each tank, keep it at the speed limit, and a near perfect tune will go a long ways, also if you add a windshield your fuel mileage will drop off considerably. My 78 cx500 gets over 50 mpg, but before i put the windshield on i was getting over 60.

 

Sounds like you guys are doing good, I average about 50 mpg on my 400 twin....

 

Second that!
40-45 is about what I get also. Honestly it's better than my CB750 Supersport that I had. It was tuned to perform with a 4 into 1 canister, no baffle and 2 size up main and pilot jets. It got around 35mpg or so, but it was fun to ride too!

 

Man, I heard that. My 550 is getting high 40's on the commute, I pretty much HAVE to run between 75-85 most of the way into the city or I will get RUN OVER. If I could just run at a leisurely 70 I'm sure the mileage would be better. That being said, the XJ will run 80 all day and it does get better mileage than my Wabbit.

 

3.4 US Gallons, of which 1.0 gallon is "reserve." This according to the factory service manual. (Seca is 4.2)

 

Wow, so I am getting lousy mileage at 34. So I guess a carb synch is in order and I don't know if it is running rich. I guess I should check the plugs, man I was just happy to get it running. How depressing! One other thing what is the oil level needed? When its sitting and off oil level is above line on glass viewer. On and running it is low? So where is it suppose to be and when do I read it?

 

wbaize
you check your oil when on the center stand.
The oil level should be in the to 1/2 of the sight glass. If it goes higher it could mean that you have a faulty petcock leaking fuel into your oil when the bike is sitting.

Also you may need more than just a sync, I recomend that you colortune the carbs so that you get the fuel mixture just right, then sync, then colortune again and sync again.
Valve adjustment may be needed but I'd start with the easy stuff 1st.

Good Luck

 

You read the oil on the main stand. Either cold, or 10 min. after it ran to allow drain-back. A trick I read in these excellent forums, is to fill until you just have a tiny air bubble left visible. Now you can check easily if your carbs flood out your crank case- - that little bubble would disappear.

My 750 was getting 32 - 38 MPG and never seemed powerful. It had 118 jets, and really needed 122 - 124 ?? because it has pods and a 4 - 1 pipe.
I opened the carbs yesterday to install some 120 jets, and to clean - check, and I fould a diaphram folded over a little on one of the carbs!!
That would basically de-activate the slider piston, so I was running on 3 1/2 cylinders this whole time. How could I make such a mistake!

When you put your carb hat on, you can slide it around and check that the diaphram is totally seated. I bet a few others out there are driving around with this invisible problem.

 

you know, the only folks that dont make mistakes are those that dont do anything!!!