Hello All

Like it says I'm getting 29 mpg. Now the bike has ported intake, VH pro pipe, SS BAK, and has been dyno tuned, I am 300lbs. I do "romp" it every now and then but most of this riding was at interstate speeds of 70-80 or so. Now I see where most of you guys are getting well into the 30's and I was wondering if with consideration of my weight if my mpg is out of line.

With me an the Wife...at least 400#'s.
Plus all the hard bag and mounts from RY*.
And the tallest windshield Yami makes...
Between 33 an 39 MPG's. The great minds here
will tweek you in the right direction.

espressodude wrote:
Hello All

Like it says I'm getting 29 mpg. Now the bike has ported intake, VH pro pipe, SS BAK, and has been dyno tuned, I am 300lbs. I do "romp" it every now and then but most of this riding was at interstate speeds of 70-80 or so. Now I see where most of you guys are getting well into the 30's and I was wondering if with consideration of my weight if my mpg is out of line.

You need to bring people up to date, on what jets they used when they Dynoed your bike. I seem to remember a 190 main, but I think you said they had to drill it out, because they didn't have one big enough. Based on that, I'm not sure if the 190, correlates to a 190 mikuni, or just what.

espressodude wrote:
Hello All

Like it says I'm getting 29 mpg. Now the bike has ported intake, VH pro pipe, SS BAK, and has been dyno tuned, I am 300lbs. I do "romp" it every now and then but most of this riding was at interstate speeds of 70-80 or so. Now I see where most of you guys are getting well into the 30's and I was wondering if with consideration of my weight if my mpg is out of line.
that's pretty much what I got doing 70-80 mph until I properly jetted my bike. Now I get 42-50 mpg

I don't know exactly what jet they used. You are correct in that he said it was drilled out to "somewhere around 190".

Mine's completely stock and I average 42 to 45mpg. And that's letting her rip thru the gears now and again....

more then likely you have a air leak at the intake o-rings when i had the milage in the high 20's it is what i found.

"Well rode it to the dyno appt. and apparently I was WAY lean. I had it at 170 and 3rd groove and the guy had to move the needle and drill out a jet cause they didn't have a 190 then had a new tire put on in the front."

This is what I was thinking about.^^^^^^^^^^^^^^^^
Is the bike running fine other wise?
About how many miles have you put on it since the dyno?
Are you seeing a lot of carbon buildup in the pipes?
Could you pull a plug from the rear cylinder and one from a front cylinder, to see how they look?
Is the bike starting good? Does it need the enricher/choke, or does it seem to start fine without it?
Are you doing a good job of calculating your mileage? The relatively small amount of fuel in the tank, would make filling it the same each time, critical. I'd think that averaging your mileage over several tanks would be a great way of doing this.

Check out the WOT tech article, and see if your bike is showing signs of running rich.

Erbman is not shy about pointing out, that even the larger main shouldn't bother you, if your not using it. 70 to 80, with a #300 rider, and into a head wind, is going to get you into the main quite a bit I would think. If you are closer to 80, then the fuel is going to go down faster, then if your close to 65.

mkayx wrote:
more then likely you have a air leak at the intake o-rings when i had the milage in the high 20's it is what i found.


If he went to get the bike dynoed, and this was a problem, would the tech catch this, or would they bump the main, to compenstae for the lean condition from a manifold leak?

This is something I was wondering. Thanks for posting this.

SKWEARpeg wrote:
"Well rode it to the dyno appt. and apparently I was WAY lean. I had it at 170 and 3rd groove and the guy had to move the needle and drill out a jet cause they didn't have a 190 then had a new tire put on in the front."

This is what I was thinking about.^^^^^^^^^^^^^^^^
Is the bike running fine other wise? Yes it's running good
About how many miles have you put on it since the dyno? about 300 to 400
Are you seeing a lot of carbon buildup in the pipes? no more than before
Could you pull a plug from the rear cylinder and one from a front cylinder, to see how they look?
Is the bike starting good? Does it need the enricher/choke, or does it seem to start fine without it? It start pretty much without the choke
Are you doing a good job of calculating your mileage? The relatively small amount of fuel in the tank, would make filling it the same each time, critical. I'd think that averaging your mileage over several tanks would be a great way of doing this. That is an average over 3 tanks

Check out the WOT tech article, and see if your bike is showing signs of running rich.

Erbman is not shy about pointing out, that even the larger main shouldn't bother you, if your not using it. 70 to 80, with a #300 rider, and into a head wind, is going to get you into the main quite a bit I would think. If you are closer to 80, then the fuel is going to go down faster, then if your close to 65.

I will do an air leak test around the intake. I just need starter fluid or ether right?