shitty gas mileage!
10-26-2008, 10:01 PM
#12
Slacker
Superstock
Superstock
Join Date: Jun 2005
Location: San Antonio, TX
Posts: 489
With a proper tune the best I have done is 41 while leading a small group, but usually 37-38. When I first got the bike I was getting 31-34. It was jetted for a K&N but I had a stock filter.
Don't feel bad, several members have reported mid 20's!
Don't feel bad, several members have reported mid 20's!
10-27-2008, 07:59 PM
#16
Senior Member
SuperBike
Join Date: Jan 2007
Posts: 2,118
33 or so and less if I run hard, going back to the stock jetting or lower (am at 180/178 I think OE is 178/175) but keeping needles shimmed .040" and OE filter and 2Bros slip-ons. Gone back to the OE sprockets (was 43 in the rear) and still no better mpg but find it needs to run in 5th as it seems to want to lug at less than 65 mph in top gear. Going to do a wet & dry comp test and maybe vacuum leak down. Wonder if I have reverse blow-by with 60k miles on the clock but always have had crappy milage (though had the 43 rear since maybe 23k when I changed out the chain). Have a spare set of carbs I may try. Still runs pretty good with no detontation on 87 octane (except under heavy load at real hi ambient temps) but have not had it on a dyno for many moons when it was putting out about 101 hp & 68 ft lbs on a Dynojet 250.
What do you think Greg? Is it just the nature of the beast I got; i.e., some run good but suck gas and others more frugal? Its bake date is 3/97.
What do you think Greg? Is it just the nature of the beast I got; i.e., some run good but suck gas and others more frugal? Its bake date is 3/97.
10-27-2008, 08:32 PM
#18
Senior Member
Superstock
Join Date: Jun 2008
Posts: 255
When I bought my hawk, I was 32-35. Then I got new exhaust gaskets, adjusted the idle down from 2k to 800 rpm, and ran some Sea Foam through a tank of gas, since it had sat some in the preveous year. After all that I get low 40's and I tested a tank on hard riding and got 39.7 mpg getting on it most of the time. So I think 40's is very capable if everything is running right.
10-28-2008, 12:02 AM
#20
Senior Member
MotoGP
Join Date: Sep 2006
Location: Austin, Tx
Posts: 4,138
Gas mileage and Superhawk do not belong in the same sentence. I got my indoctrination early with one of the forum adminstrators. We're going to meet for breakfast. Breakfast was great.
After breakfast we take a spirited ride out 963 and the RLOD comes on just as we get to 183. We're 18 miles north of Seward Junction so I think to myself no sweat - all the reading that I've done on the forum I got 30 or so miles to empty. I can make it to the Junction no prob. We say our gb's and we're off. Remember Briggs Texas, it's like one of those horror movies. Last chance for gas, shitty food, don't blink and BTW last chance for gas! Blew through there like rock stars in a limo and ended up 3.5 miles short of the Junction. The bike died just as I was passing a concrete mixer. I gotta hand it to that driver as we were both trying to figure out what the **** was going on. I was passing him and then he was running over me.
It got worse. So bad that when I lifted the tank I was getting 77 miles to the light. So I pull the tank (one of my favorite maintenance maneuvers) expecting to find a dirty K&N. Not - dirty stock filter.
The PO had the bike jetted to accomo the new TBR high mounts but the shop failed to replace the air filter. ???
Obviously somebody did not have all their ponies behind one fence. I put a new K&N in the bike and tested last weekend. Huge difference. The bike is - huge difference. Did I say that? Huge difference. The bike is smoother and doesn't pound (detonation) like it did. It's maybe still a little rich but it pulls like a sled-dog all the way up. The idle is better, the run off choke while warming is smoother/better/not puking rich. As I'm rounding the corner to get back up to the shop the light comes on. 102.5 miles. That's right at 30 mpg. That's twice as good as my truck and I will leave it at that.
After breakfast we take a spirited ride out 963 and the RLOD comes on just as we get to 183. We're 18 miles north of Seward Junction so I think to myself no sweat - all the reading that I've done on the forum I got 30 or so miles to empty. I can make it to the Junction no prob. We say our gb's and we're off. Remember Briggs Texas, it's like one of those horror movies. Last chance for gas, shitty food, don't blink and BTW last chance for gas! Blew through there like rock stars in a limo and ended up 3.5 miles short of the Junction. The bike died just as I was passing a concrete mixer. I gotta hand it to that driver as we were both trying to figure out what the **** was going on. I was passing him and then he was running over me.
It got worse. So bad that when I lifted the tank I was getting 77 miles to the light. So I pull the tank (one of my favorite maintenance maneuvers) expecting to find a dirty K&N. Not - dirty stock filter.
The PO had the bike jetted to accomo the new TBR high mounts but the shop failed to replace the air filter. ???
Obviously somebody did not have all their ponies behind one fence. I put a new K&N in the bike and tested last weekend. Huge difference. The bike is - huge difference. Did I say that? Huge difference. The bike is smoother and doesn't pound (detonation) like it did. It's maybe still a little rich but it pulls like a sled-dog all the way up. The idle is better, the run off choke while warming is smoother/better/not puking rich. As I'm rounding the corner to get back up to the shop the light comes on. 102.5 miles. That's right at 30 mpg. That's twice as good as my truck and I will leave it at that.
Last edited by nuhawk; 10-28-2008 at 12:22 AM.
10-28-2008, 09:47 AM
#23
Nose Picker
Back Marker
Join Date: Oct 2008
Location: Tacoma, WA 98408
Posts: 130
35-57mpg
I average about 35 too, but this is around town driving. I went on a 300 mile trip and during that trip it got 57mpg on one tank 53 on another and 47 on the last tank but i did use the rest of the fuel that was in it after the trip around town.
I average about 35 too, but this is around town driving. I went on a 300 mile trip and during that trip it got 57mpg on one tank 53 on another and 47 on the last tank but i did use the rest of the fuel that was in it after the trip around town.
10-28-2008, 11:00 AM
#26
Senior Member
Superstock
Join Date: Jul 2007
Location: CA, South of Heaven
Posts: 342
Thanks Tweety. That kinda suck. I'm forced to buy a speedohealer now. I don't want the ODO to show one day 20K miles when I only rode the bike for 15K.
Hmmm that also means that I probably don't get more than 70-80 miles out of a tank. But yeah, I ride her hard most of the time.
Hmmm that also means that I probably don't get more than 70-80 miles out of a tank. But yeah, I ride her hard most of the time.
10-28-2008, 06:30 PM
#29
Senior Member
SuperBike
Join Date: Jan 2007
Posts: 2,118
If that is the case, then when I had on the 43T rear, it was actually getting less milage than it calculated out? If so, my mpg was lower than I thought and now that I have a 41T back on, am I actually geting better mpg, allbeit the same as I THOUGHT I was getting but was not? My brain is too tired to figure it out myself now.
