muttstang
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Location: Sioux Falls, SD
Bike: 1985 Honda Nighthawk 700
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« Reply #25 on: June 17, 2010, 07:05:06 AM » |
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I just hit the reserve this morning after 102 on the odometer. But I believe that it needs a new air filter badly and running some seafoam through the tank wouldn't hurt either
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1985 CB700SC always a project in process! Cams re-timed ;)
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hppants
--- NHF---
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Location: Lafayette, LA
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"Aging is inevitable. Maturing is an option!"
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« Reply #26 on: June 17, 2010, 09:28:54 AM » |
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Saturday, I put 143 on a tank without hitting reserve. Must have been close though. Took 3.4 gallons to fill.
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2005 FJR1300 96 CB750 - sold 84 CB700SC - sold
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NorCalToy
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Location: Dunsmuir, CA
Bike: 1992 Nighthawk 750
Posts: 83
Join Date: Jun, 2010
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« Reply #27 on: June 17, 2010, 11:14:19 AM » |
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Last wkend I went on a longer ride (~150 miles) and filled up to be sure I had enough fuel and to check my mileage since it was my first out of town ride and I pulled 49.6 MPG with a 1992 NH 750
I was pumped when I calculated the mileage because I was riding fairly hard especially in the straights to try to catch back up after being left behind in corners.
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muttstang
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Location: Sioux Falls, SD
Bike: 1985 Honda Nighthawk 700
Posts: 2075
Join Date: Nov, 2009
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« Reply #28 on: June 17, 2010, 12:05:09 PM » |
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I filled with 3 gallons so it's about 34mpg. I'll have to see what that becomes with a new air filter.
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1985 CB700SC always a project in process! Cams re-timed ;)
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biometrics
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Age: 64
Location: Winchester, VA
Bike: 1983 Nighthawk CB650SC
Posts: 208
Join Date: Oct, 2009
Kagnew Station (Eritrea) 1972-1973
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« Reply #29 on: June 24, 2010, 10:12:27 AM » |
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Heres a real world report. Yesterday I decided that rather than take my 83 NH650 just to the commuter bus stop about 22 miles away that I would ride it all the way to work in downtown Washington DC which is approximately 75 miles from my home. I stopped and filled the gas tank right to the cap and carefully closed the cap and started my journey. It was a long hot trip  and I loved it! VA Route 7 from Winchester to the Route 28 along Dulles International Airport, then US Route 50 (Constitution Ave) into the District of Columbia to the place where I work near 12th and Independence Ave. Parking was a problem, but I finally found some motorcycle metered parking about 1 block from my office that was only $0.25 per half hour and 12 hours of parking were authorized! A great deal.  A guy came out of the Department of Agriculture building and immediately walked over and got excited about my bike... Shaft Drive? 1985 or 1986 he said... No, 1983... the first year for shaft drive. He really liked the bike and his comments made my trip worth it in 94 degree weather... After work I decided to take I-66 home and flew with the traffic almost to VA Route 55 where I had 127 miles on the trip odometer when I had to switch to my reserve... a feat I never have to want to do again at 65 MPH on an interstate  ! Once I switched to reserve, the motor stopped sputtering and I was back in traffic... I said a little prayer to let my reserve last until I got to the first available gas station on my route which is about 10 miles from my home... I guess I should have prayed a little harder since I coasted to a stop about 150 yards from the gas station with 160 miles on the trip odometer!I walked that last few yards, took a gatorade bottle out of the closest trash can, and put about two cups of gas in it and walked back and fed my baby... then drove the last 150 yards to the pump and filled her up. So what does that mean? 160 miles to empty... if it is 3.6 gallons to fill it, that translated to 44.44 Miles per Gallon.  Not too shabby for an old guy (62) with an old bike (27) ! If I had not spent more than a half hour driving around trying to find parking in DC, I probably would have made it all the way home, which is about another 12 miles... but I know that the stopping and starting of the DC traffic probably drank more than the consistant 65-70 MPH I was doing on the highway... 
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__________ regards, -JS 1983 Nighthawk CB650SC with 48K mile
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vert
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Location: Richmond, VA
Bike: 1985 650sc
Posts: 264
Join Date: Feb, 2009
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« Reply #30 on: June 24, 2010, 02:55:55 PM » |
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The book says we've got like a 4 gallon capacity, .5 of that reserve. However, I fill up when I hit the red and only put in about 2.5 gallons. I hit the red at around 90-100 miles and need to switch to reserve definitely at around 110 miles.
According to this site http://hondanighthawks.net/700s.htm you have a total of 3.6 gallons which INCLUDES 0.7 in the reserve. So you really have 2.9 gallons before you you hit the reserve. Stats for my 650 say that I also have a 3.6 gallon tank with the same 0.7 in the reserve. I usually fill up around 110 miles (not hitting the reserve yet) and put about 2.5 gallons which would make sense based on the tank volume.
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Brittles
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Bike: 1984 CB700SC
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« Reply #31 on: June 24, 2010, 03:19:28 PM » |
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I had a completely empty 700s tank and filled it with water. It held 4.5 gallons. That 4.5 gallons put the level about halfway up the filler "neck". I usually fill mine just to the bottom of that neck.
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John
'84 CB700SC '04 XL1200C
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LOKi
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« Reply #32 on: June 24, 2010, 03:19:59 PM » |
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Up to 300 miles between fuel stops baby! 9 gallon fill up. really 330 to 9 gallons commuting so 36.6 mpg. I COULD get better millage than that but what fun would that be.
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Drive fast, take chances!
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Brittles
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Bike: 1984 CB700SC
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« Reply #33 on: June 24, 2010, 03:40:16 PM » |
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So what does that mean? 160 miles to empty... if it is 3.6 gallons to fill it, that translated to 44.44 Miles per Gallon. So you put in 3.6 gallons of gas? BTW, if you ever run out of gas again you can usually lean the bike as far left as possible (without droppping it  ) and get a few more miles.
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John
'84 CB700SC '04 XL1200C
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gammer
Crazy Canuck
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Location: Kingston, Ontario
Bike: 85 NH 750S - cam mod, K&N, jet kit, MAC pipe, Andrews ign.
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Join Date: Jul, 2008
"Hang on lady, we going for a ride" - Short Round
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« Reply #34 on: June 24, 2010, 03:55:00 PM » |
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On average I get approx 200 Km's (124 miles) before I hit reserve...I'm not that conservative of a driver on my NH though...
I noticed that mine improved drastically when I installed new tires and bearings last summer and when I finally got my jetting nailed down.
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Certifiably not certified. Technical answers based on experience
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Snoopy
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Bike: '85 Hawk 700s aka Snoopy
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To come, or to go as long as I am on my nighthawk.
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« Reply #35 on: June 24, 2010, 04:03:13 PM » |
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I average 44-50 mpg depending on how I ride. I start getting nervous at 120 miles. I usually don't go much past that. I plan on saturday, strapping a gallon gas tank to my luggage rack and going..how far..I will let you know.
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1985 Nighthawk 700s, 1994 VW Jetta VR6 - Sold, 2005 Pontiac G6
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skramer360
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Location: Bloomington, In
Bike: 1985 cb700sc. The "s"
Posts: 1959
Join Date: Aug, 2008
Life is short. Eat dessert first.
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« Reply #36 on: June 24, 2010, 07:01:02 PM » |
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I usually get gas about 150 miles. Haven't hit reserve yet.
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I'd rather be riding my blue '85 (700s) Steve
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Old_Rider_54
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« Reply #37 on: June 24, 2010, 07:48:35 PM » |
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With the standard gearing, I get 46 - 50 MPG, since I drive like an old codger  , so with 5 gallons plus, 200 miles would be easy. But, since my butt can't take more than 90 minutes riding, I'm stopping after every hundred miles or so for a break. I switch to reserve at around 120 - 140 miles.
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1991 CB750 Nighthawk
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Brittles
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Bike: 1984 CB700SC
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« Reply #38 on: June 24, 2010, 07:50:48 PM » |
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I filled up the other week at 160 miles without being on reserve.
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John
'84 CB700SC '04 XL1200C
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82CB750SC
Chemistry Teacher
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Age: 31
Location: South Jersey
Bike: 1982 Honda Nighthawk 750SC
Posts: 394
Join Date: Apr, 2010
Now...what does this thing on the bike do?
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« Reply #39 on: June 25, 2010, 09:35:37 AM » |
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The most I have gone is about 120 before reserve. I got 43 mpg just this past week.
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Joe
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SliverXZennon
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Bike: 1996 Honda Magna 750
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« Reply #40 on: June 26, 2010, 05:45:39 AM » |
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148 on regular. Then another 20 on reserve. Just having it on reserve makes me nervous...
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700 'Hawk - Sold..
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hppants
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Location: Lafayette, LA
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Join Date: Aug, 2009
"Aging is inevitable. Maturing is an option!"
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« Reply #41 on: June 27, 2010, 05:21:24 PM » |
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During one run yesterday with Luckylindy, I got by far my worst gas mileage - 34.5!! Man - in dirt biking terms, we were "on the pipe". What a hoot!!
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2005 FJR1300 96 CB750 - sold 84 CB700SC - sold
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mikem1968
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Location: Hopatcong, New Jersey
Bike: 1985 Nighthawk 650
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« Reply #42 on: July 01, 2010, 02:51:45 PM » |
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I'm barely making 35 mpg on my NH CB650SC - I've learned (the hard way) to definitely fill-up every 80 miles (90 is pushing it) - of course I learned that lesson last year when I first got my endorsement and I was still to askeered to really get out on the highway and open it up.
I'm sure I could probably go up to 100 miles before filling up again now that I'm out on the HWY more. Maybe more (just don't need to push my bike home again) LOL
My only problem with my current commute is traffic on the way home at rush hour (it's stop and go for MILES - every single day!!) That's where I'm definitely losing some great mileage.
Mike
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