MPG

[fatmitch84]

I have a 1981 CB 750K.  What kind of mies per gallon should I be getting.  As of now I'm getting about 32.  Is that low?  If so, what can I do to correct it?

[shabbabear]

hi mitch..that's about normal for the older bikes...back then fuel mileage wasn't that important due to $1.00 gas...and the weight of the older units was huge compared to today...hope that helps out friend...shabbabear

[blackhawkrider]

I agree with Shabba as well although I  have seen mpg numbers on my 750 as high 45 miles but that was on a 200+ mile freeway jaunt.

[SECTION8]

I have a 81 750k that most recently recorded at 44.4 at my last mile/gal ratio. Just sync'ed the carbs the other day and I must say that really does make a change when those are set right. Im happy with close to 45 on the old champer.

[free2ride]

averaging 34 US MPG, but that's because mine was sucking gas when I first got it, with  more in town driving. Last tank 41, all highway.

[edit: '80 K

[sgtslag]

I have a '79 K model.  I average 43 MPG, but I run mostly two-up, highway, at an average speed of 60 MPH.  I'd have to agree:  it seems a bit low, and synchronizing the carbs is a very good idea.  Secondly, check the idle speed:  book specifies 1,000 RPM +/- 200 RPM, but they state that an accurate, mechanic's tachometer must be used, as the bike's own is too inaccurate.  Checking/adjusting the air/fuel mixture is also a good idea, but to really dial this in, requires an exhaust gas analyzer.  Anyway, get your bike tuned up, install NGK Iridium Spark Plugs (fire near-perfect, every time; easier starts; incredibly quick starts with the weak, OEM coils), and you will likely see improvements not only in mileage, but also performance.  Cheers!

[rrgunslinger]

I could probably get above 40mpg if I tried but what fun would that be!  :))))

On Tue, May 29, 2012 at 9:07 AM, sgtslag [via Honda CB750'S] <[hidden email]> wrote:

I have a '79 K model.  I average 43 MPG, but I run mostly two-up, highway, at an average speed of 60 MPH.  I'd have to agree:  it seems a bit low, and synchronizing the carbs is a very good idea.  Secondly, check the idle speed:  book specifies 1,000 RPM +/- 200 RPM, but they state that an accurate, mechanic's tachometer must be used, as the bike's own is too inaccurate.  Checking/adjusting the air/fuel mixture is also a good idea, but to really dial this in, requires an exhaust gas analyzer.  Anyway, get your bike tuned up, install NGK Iridium Spark Plugs (fire near-perfect, every time; easier starts; incredibly quick starts with the weak, OEM coils), and you will likely see improvements not only in mileage, but also performance.  Cheers!

1979 CB750K
1993 Kawasaki Voyager XII

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[LukeM]

My '79 CB would get about 45mpg combined city/highway, a little higher if all highway.
My '84 Shadow gets about 50mpg.  700cc vs. 750cc, and the Shadow is a bit lighter.
My 2004 Honda Metro blows them both away: 100 mpg.  50cc vs. 700, and 35 mph vs 70+.

Luke M

[rrgunslinger]

My 2011 Harley Rode Glid Custom gets close to 50mpg with the 103 motor. The Honda Valkery I had averaged around 33 mpg but in a head wind that would fall to 23 real quick. Plus any fast interstate 75+ driving I had to stop every 100 miles and it had a 5 gal tank! It was one of thoes bikes that you run out of gas and had to switch to reserve to get to a gas station.

On Tue, May 29, 2012 at 10:53 AM, LukeM [via Honda CB750'S] <[hidden email]> wrote:

My '79 CB would get about 45mpg combined city/highway, a little higher if all highway.
My '84 Shadow gets about 50mpg.  700cc vs. 750cc, and the Shadow is a bit lighter.
My 2004 Honda Metro blows them both away: 100 mpg.  50cc vs. 700, and 35 mph vs 70+.

Luke M

Used to have a 1979 CB750L, sold it as a parts bike, now riding a slightly modified 1984 VT700C. Network/Field Engineer. Central OH, USA, Earth, Sol System, Milky Way Galaxy, Universe.

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[shinyribs]

My '76 F has semi open exhaust and pods and is jetted above stock. I average 42-45. I got 46 over this past weekend and have gotten a best of 51 with strictly interstate driving. I have heard that the automatics get less.