<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 - -- 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.
