<MPG> You should get in the neighborhood of the 40s. Too many variables to be exact. Headwinds, windshield or no, tire size and condition, passenger or not, speed, style of riding, etc.
Best to track gallons vs. mileage over a period of time, then average the numbers to come up with a ballpark for your particular bike. My 750 generates 42-ish. I've heard of more sedate riders getting as much as 50 and some zoom-zoomers as low as in the 30s. On Feb 22, 2:31 pm, 85_NH650 <[email protected]> wrote: > You guys are on the right track. I found an old invoice showing that > they installed a set of #38 pilot jets and 8 washers. I guess I'll > find out what size they are when I get to that part. I did read about > the washer mod on several sites. > > BTW, what kind of gas mileage should I expect from an 85 NH 650? I'm > in Florida, but (unfortunately) I only ride it once in while, so I > lose track... Great bike though. > Hey Surf, I have to go easy on the PO here, because some day I might > be one... ;-) > > Thanks guys. > > On Feb 22, 2:23 am, surfswab <[email protected]> wrote: > > > > > <I think someone put some > > shims in there and the bike seems to run rich.> > > > Much as I hate to admit it, that may be something the PO actually did > > right. Hondas tend to be cold-blooded (slow to warm up and run right > > and a characteristic mid-throttle hesitation) because the carbs are > > set purposely lean from the factory to avoid running afoul of the EPA. > > > A common mod to improve throttle response is to insert two Radio Shack > > #4 washers under the needles, in lieu of a trial-and-error rejet. It > > improves performance throughout the range. > > > I won't let the PO off entirely, though. It depends on whether he > > used the correct washers. I forget the exact measurements of the > > washers, but I know #4 works best. Of course, if he used some other > > washers out of a can he had lying around, he might still be the dufus > > we've accused him of being ;-) > > > Anyway, #4s would only cost ya a couple bucks, and you'd know you had > > the right ones. > > > On Feb 21, 6:21 pm, 85_NH650 <[email protected]> wrote: > > > > Hi Pat. > > > Somehow the ascii drawing got distorted, but you got the picture! > > > Thanks for sharing your knowledge with the group. Now I feel better > > > about installing these gaskets. I guess the POs were reinstalling torn > > > gaskets and used sealant to prevent leaks from the tear and old > > > rubber... > > > I'll be tackling the needle jet next because I think someone put some > > > shims in there and the bike seems to run rich. > > > Thanks again. > > > Richie > > > > On Feb 21, 12:24 pm, Pat Patterson <[email protected]> wrote: > > > > > Nice askii sketch btw. That's called a double lip o-ring. In the > > > > hydraulics world it's the best but can be fussy to get to lay in the > > > > grove properly. You MUST make sure it doesn't get rolled or twisted > > > > on install. Don't use any sealant But a light smear of oil (110% no > > > > dust or grit) can sometimes help it seal for startup. On fussy > > > > sunstrand pumps I've used a very light smear of white lith grease but > > > > carbs don't work at 2500psi so you should be ok. > > > > > At 08:02 AM 2/21/2012, you wrote: > > > > > >Hi Bob, > > > > > >Just to clarify, this is what a cross-section of my gasket looks like. > > > > >The upper part is more 'rounded' of course and fit the carb's groove > > > > >perfectly while the bottom part has a groove inside that runs around > > > > >the entire gasket's shape. > > > > >Richie > > > > > >Bowl Side > > > > > ________ > > > > >/ \ > > > > >| ______ | > > > > >|_| |_| > > > > > >Body Side > > > > > >On Feb 20, 6:26 pm, [email protected] wrote: > > > > > > I just looked at a spare carb and was reminded that the gasket is a > > > > > > molded > > > > > > o-ring that matches the shape of the groove in the bowl. The o-ring > > > > > > looked > > > > > > to be round(cross section). > > > > > > > On Mon, Feb 20, 2012 at 1:23 PM, 85_NH650 <[email protected]> wrote: > > > > > > > Hi Guys, > > > > > > > > I finally decided to take the plunge and clean my carbs myself. I > > > > > > > have > > > > > > > an 85 NH 650 that had terrible recurring issues with hesitation/ > > > > > > > choking/stalling at low speeds while performing fine at higher > > > > > > > speed. > > > > > > > I had the jets cleaned a couple of times but the problems came > > > > > > > back > > > > > > > within days. This started around the time ethanol was introduced. > > > > > > > > I'm still in the process of cleaning the carbs, but I'd like to > > > > > > > know: > > > > > > > 1). which side of the gasket faces the float bowl (bottom part of > > > > > > > carb): the rounded side or the 'grooved/flat side? > > > > > > > 2). Do I need to use any kind of sealer/compound or RTV (?) type > > > > > > > stuff > > > > > > > on the gaskets before installing? Or anything else to 'treat' the > > > > > > > gaskets before installation? > > > > > > > > It looks like whoever worked on the carbs before used some type of > > > > > > > gasket sealing stuff and I had to soak/clean up a mess of old and > > > > > > > newer material that had deteriorated and clumped into the carbs > > > > > > > and is > > > > > > > probably effecting the low jets. We shall see. > > > > > > > > I'd appreciate any help/advice you can give me as this is the > > > > > > > first > > > > > > > time I tackle this task to cut down on the cost of having someone > > > > > > > else > > > > > > > do it for me. > > > > > > > > Thanks, > > > > > > > > Richie > > > > > Pat Patterson > > > > Abbotsford, BC, Canada > > > > VA7PDP > > > > > 2001 PT Cruiser > > > > 83 450 Honda Nighthawk > > > > 78 F350 460/C6 on propane > > > > 71 Bronco 302/C4/D20 D44/9" {o===o} > > > > > "Just add Lightness-" > > > > Colin Chapman. (1928 - 1982)- Hide quoted text - > > > > - Show quoted text -- Hide quoted text - > > - Show quoted text - -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
