Topic: Realistic gas mileage 350F

[TomL]

What is an acceptable and realistic gas mileage that I can expect from a 350f?  Currently I've been getting about 30-35mpg, which seems low.  I have a new air filter, MAC4-1 up sized main jets (forgot which size)to help the lean conditions.  3 of the plugs are a little sooty.  Could probably use a carb sync.

Basically I want to know how far out of whack my mpg is.  The bike runs well, if a bit rough on the rare occasion.

[mlinder]

When I babied mine around, I got as much as 60mpg.
When I throttled her, maybe as low as 40.

[flybox1]

remember, its also a function of how hard you flog it.  
over the past 1200mi, i'm at or just above 40mpg.
not bad for a 225lb, 6'5" windsail!
fb1

[flybox1]

Thats about as bad as my 6'8" 220 lb frame hulking around on my 550! 

lol...having the drag coefficient of a brick does not equate to good gas mileage! 

[TomL]

Any ideas to improve mileage?

[TomL]

A little over 10,000 on the bike.  Rebuilt carbs.  No leaking or overflow. Plugs are a little sooty on cylinders 1,3,4.  Cylinder 2 if anything is a tad lean.

[bender01]

I get 34-36 on mine. Mac 4>1 stock 75 jets. I weigh 200lbs and flog it always. Curious as to the top speed you achieve? If I tuck and wait a minute ill hit 80 . As soon as i sit up its 70.Id like to get bigger jets but I dont want to deal with retuning this thing. As it is it runs good now. Anyone with 4 extra 80 or 85 jets? Ive got 4 new 75s to trade.

[TomL]

I think mine has 78 jets.  I have gotten it up to 90 (according to the speedo).

[mlinder]

I've hit an indicated 100 on mine. A proper tuning should get you better gas mileage and higher top speed, assuming compression is good.

[HondanutRider]

Boy, these little guys sure are thirsty!  I just checked mine when I topped-up and calculate it got 38 mpg (US gallons).  Its better when I do the conversion to British gallons (46 mpg), which is what I was used to in Canada.  We now are metric so the gas is sold in litres.  I almost get that mileage on my 1800cc Goldwing!

[razor02097]

Wow.... my 650 gets about 48mpg  I usually cruise at 75-80 mph 

[tonycb650]

i get @ 48 on my 650 also.

[hoodellyhoo]

On my 350 with stock intake and MIVV exhaust (Air screws set to stock and needle clip one step leaner than stock) I'm averaging 47-50 mpg. With the same setup with my old 4-2 system I got a consistent 55 or more mpg with an all time high of 65 when I did a lot of in town driving.

[tlbranth]

On my 750 I get 44-48mpg. My GL1500 goldwing gets about 42. Here's the interesting part. The Goldwing used to get 5mpg better than that 'til I switched from Motul to Amsoil synthetic. At first I thought the drop was due to seasonal fuel change. But it hasn't increased. In 15 or 20 years, when I run out of Amsoil, I'll try Motul again - see if the mileage improves.
These mileages, by the way, are 2-up conservative driving.

[CrashBar]

Bone Stock CB350F - I get 50mpg on a regular basis. 

[HondanutRider]

I mentioned my poor mileage on the CB350F a few posts ago.  I think I know why it's so poor.  Today I was out for a spin and found it to start fading on the highway with no power.  I pulled over and saw gas flowing out the overflow tubes.  Tried tapping the float bowls but they wouldn't stop spewing gas, so I headed home while turning on and off the petcock so that it would just keep the bowls full.  I've pulled the carbs and am going to replace the o-rings with the correct ones that I now have, as well as clean the float valve seats.  Hope that does the trick.

On another note of mileage, I was out on the 2003 GoldWing (1800cc) and filled it with gas after having ridden 400 Km on the tank.  I calculated my mileage from that tank as being 54 mpg (British - 45 mpg US gallon).  Not bad for some fast highway, and half with the pillion occupied!  Now, I should be able to better that with a 350 Four.

[333]

Mine has about 28,000 miles, Mac 4-1, stock air filter.  I run it hard and get 48 MPG.  I am 6' and 250(when I last checked milage.  I have dropped 15 since then.).  It will be interesting if that makes a difference.