mpg

[fritobandito]

I'm sure this topic has been covered, but please humour me. I just checked my gas mileage today, and it came out to be 38 mpg. I have a 2001 B12. That seems low to me. Could out-of-sync carbs have a big effect? What do you guys get?  

[Swamp Rat]

I usually get about 42 mpg and it's all stock.

[elofdahl]

I get 40-44 in the local mountains, depending upon how aggressively I'm riding.
When touring, I average between 46 and 48, depending upon my speed.  On one trip where I consistently held my speed down to 65MPH (indicated), my over-all average was 48.3 for the 3400 mile ride.

Eddie
Completely stock '03 1200S, except the pilot screw plugs have been drilled out, allowing me to adjust the screws 3 1/2 turns out.

[PaulVS]

I have an 03 1200s and I get about 37-39 mpg.

(The jet kit I have takes a couple of mpg's off)

[txbanditrydr]

Mine swings pretty wide depending on terrain and riding speed.  On the high end I got 48 mpg with steady cruising downhill (out of the mountains)... on the low end I have seen 35 mpg with lots of stops and fast starts and never really reaching 4th or 5th gear much.  On our recent Arkansas trip I tracked 8 tanks of gas and averaged out six of them by throwing out the high (48) and low (35) tanks.  

Ended up with 42.5 mpg for the 1,000 mile trip.  Now I can quit worrying about it and just RIDE!!!!!    

[Noonie]

My journeys to university and work are about 10 miles each way so not perfect for good economy but I'm getting just under 42mpg.

[oremike]

I get 38 mpg all the time. When I first installed the Ivans jet kit I didn't do as seggested I set the clips at the richest end. It was kinda boggy untill I wacked the throttle WFO. Then it was OMG fast, with 3rd gear power wheelies, milage was around 25 MPG's. I readjusted the needle clips and changed my dirty air cleaner so now my milage is resonable.

[Red01]

While stock, my average was 41-42, worst was 39 and best was just shy of 45 (wasn't trying to set any mpg records, just a milder run on that tank of gas than normal). Now, with the Holeshot Stage II, average is 39, worst was 37 and best was 42.

[terrebandit]

I always got 40-43 mpg with my 2001 B-12S at near sea-level conditions with 87 octane gas (got worse mileage with mid-grade or premium gas).  

It didn't matter how hard I ran it as I always got the same fuel mileage.

Dave

[banditII]

Yep, I routinely get 42 / 43 mpg on my 05 B12 most any way I ride it.  I suppose if I flogged it up at high elevations it would probably dip into the 30's?

[Cargo7]

The best mileage I've gotten is a 56 mpg day = (47miles/usg) of easier backroad riding on my totally stock '03 B12S. Often, I've gotten up to 54 mpg on several days on the highway.

This is quite a bit better than my '83 Yamaha XJ1100 so I'm pleased about that because the overall range with the 20L tank is pretty decent.

[ray nielsen]

It sounds as though your mileage is a bit below what most others are getting.  One suggestion is to check the Throttle Position Sensor (TPS) to be sure it's set correctly.  It's easy to check, but you need the factory shop manual to do it correctly.

Whle my manual is loaned out I can at least remember the process.

Disconnect the three wire connector at the TPS body on the right side of the carburetors.  

Measure the resistance from the outside pins of the TPS and record the value in ohms.  With the throttle at idle position the resistance from the center to the rearward pin should read a percentage (don't remember the number) of the total resistance.  If NOT, loosen the TPS holding screws and reposition it until the reading is correct.  Tighten the screws and recheck, adjusting until you get it right.  (Maybe someone with access to a factory manual will chime in here with the correct percentage value.)

On my 03 1200 it was way off and correct adjustment raised the mileage from about 36 MPG to over 42 MPG.  

I've had as high as 49 MPG with non-oxygenated fuel and regularly get 42-43 MPG in mixed riding, town and country.

[fritobandito]

Sounds like a plan. Thanks for the info. Yep, I've been disappointed in my mileage after hearing what others are getting. But, it's a whole bunch better than the 19 mpg my truck gets eh.

[fritobandito]

Reading between outer posts: 3.5 to 6.5 kohms on B12 and 5 kohms on B6. (top left and lower posts on B6)
Reading between center and forward-most posts: 2.66 to 4.94 kohms on B12 and 3.09 to 4.63 kohms on B6 (top right and lower posts on B6)

I found these in the Haynes manual.

[ray nielsen]

I'll add a bit of explanation to the numbers mentioned in the last post.

The range of resistance between the end posts is 3.5 to 6.5 K ohms with a desired center value of 5K ohms.  

If you had exactly 5K ohms you'd want 76% or 3.8K ohms from the center to the bottom post.  

If you got 3.5K ohms end to end, you'd want 76% or 2.66K ohms.

If you got 6.5K ohms end to end you'd want 76% or 4.94K ohms.  

Whatever end to end resistance you want 76% of that at idle.  A digital ohmmeter works better than an analog meter in that you get better resolution of the numbers and don't have to read the ohms scale which is non-linear on most analog style meters.

Just a few helpful hints.  The adjustment is easy once you know what you're looking for (76%).