Find anything in the slow jets ? How about the brass tubes above the mains ? At 3~4K you start to depend on the next circuits to supply fuel. Since these have enricheners and not chokes, you can add some choke to make it run richer. Now if that helps, increase the main jets to 120. You don't specify if the stumble is just that or it is popping. ?? A pop is a good indication of lean. If it truly is that lean, you could'nt get it to go above 5k at all. Getting it up there slowly means to me (IMHO) that the air speed is too slow to pick off fuel. That's where the choke addition comes in. If that makes it worse, let me know. A high air flow filter actually causes a slowing of the flow. Untill they repeal the laws of physics (Obama just might) high speed air works best. You do have the lid on the air box ? With the snorkle ? I hope so. A complete air box is vital. One more thing, is this K&N cone shaped ?
--- On Fri, 3/27/09, Snookfever <[email protected]> wrote: From: Snookfever <[email protected]> Subject: [Nighthawk Lovers] Re: 1984 Nighthawk 700s K&N Air filter To: "Nighthawk Motorcycle Lovers!" <[email protected]> Date: Friday, March 27, 2009, 12:56 PM Ok, I wired the slow jets,put the K&N air filter in. I found some particles in the bottom of the carbs so I added an in line fuel filter. It ran fine at idle. Take off was ok. When you open the throttle from 3k to 4K it sputtered, could not get to 5 K and beyond without very gradual throttle turn. Plug Test: Cleaned number 1 and 4 plug and replaced. Both were brown on one side and white on the other Pulled plugs after 1 mile ride and no real color change from cleaned look. What now? Glen On Mar 22, 6:38 pm, Dennis Hammerl <[email protected]> wrote: > If you can't pass a wire through it, it isn't clean. That's what I mean. The wire size is .0011" for a #35 slow jet. I don't care if you can blow through it, see through it,etc. If a .0011" wire doesn't pass through it, NG. > If you want it to work with a K&N, test that way. > > --- On Sun, 3/22/09, Snookfever <[email protected]> wrote: > From: Snookfever <[email protected]> > Subject: [Nighthawk Lovers] Re: 1984 Nighthawk 700s K&N Air filter > To: "Nighthawk Motorcycle Lovers!" <[email protected]> > Date: Sunday, March 22, 2009, 2:19 AM > > What do you mean by did I wire out the slow jet? I soked them in > acetone and blew them out with compressed air. I pulled number 4 plug > it was light tan on the insulation with some black on the threads. > Should I run the plug test with the stock filter or the K&N? > > On Mar 21, 3:03 pm, Dennis Hammerl <[email protected]> wrote:> Did you wire out the slow jet ? And yes, I have a method of enriching a > > K&N filter. I have one in one of my 700s and it required no changes but I > did a neat stunt and gave it more bottom end. My 700s pulls hard from 2K up. > Made huge difference for me. I granny around a lot and spend too much time in > traffic. Less shifting now. To understand it, you need to grasp air flow > dynamics. The British did some good research on it back in the 50's. Get it > to work right first. > > > --- On Sat, 3/21/09, Snookfever <[email protected]> wrote: > > From: Snookfever <[email protected]> > > Subject: [Nighthawk Lovers] Re: 1984 Nighthawk 700s K&N Air filter > > To: "Nighthawk Motorcycle Lovers!" > > <[email protected]> > > > > > Date: Saturday, March 21, 2009, 9:57 AM > > > I am very meticulous so I completely tore down the carbs and cleaned > > evey single part individually including pilot, needle,main jets, > > choke, every part. I was careful to put the same part back in the > > same carbs. I also disasembled and cleaned the petcock and screen. I > > blew every part dry with compressed air, I replaced O-rings and > > reasembled. The factory air filter is relatively new. > > > I installed the K&N as instructed and removed the snorkel flipped the > > lid and installed. With the factory air box it idles perfect, but does > > hesitate just a little at take off. I will perform the spark plug > > check and get back to you, but when I pulled one they were lite > > colored. Looks like she is running a little lean. If that is the case > > what do you do to enrich? > > > Thanks for the help > > > On Mar 20, 12:55 am, Dennis Hammerl <[email protected]> wrote:> > > Above 5k it runs mostly on the mains. I expected you to say right off idle > > > when pulling out. If you really cleaned the carbs, how ?> Now to do a > > defined search for your problem. Ride the bike at the problem > > > RPM for several minutes.put up with all it's actions. Ride it for at > least a > > half mile that way. Pull the clutch and shut it down with the kill switch. > Pull > > over and remove some plugs. White ? brown ?, black ?> Take a picture > > and forward. A plug reading, done right will indicate the > > > nature of the problem.> From what you tell me about the tank rust > > problem, I suspect the supply is > > > > > > > poor to the carbs. The original air filter (especially if it was somewhat > dirty) > > would be a compliment to a poor delivery system. The K&N, passing more > air, > > would not. In other words.. lean, white plugs. Main jets are not likely to > ever > > clog, but with an inadequate fuel supply the condition you describe would > be > > expected.> One last point for this post, are you installing the K&N > with the > > > air-box lid ? Very tempting to do. It sounds neat, but runs poorly. > > > > --- On Thu, 3/19/09, Snookfever <[email protected]> > wrote: > > > From: Snookfever <[email protected]> > > > Subject: [Nighthawk Lovers] Re: 1984 Nighthawk 700s K&N Air > filter > > > To: "Nighthawk Motorcycle Lovers!" > > > <[email protected]> > > > > Date: Thursday, March 19, 2009, 1:13 AM > > > > Dennis, > > > > Withe the K&N It is not responsive,bogs down when accelerating. > I do > > > not remember the exact RPM range, but I think above 5K so maybe > > > midrange. I discovered rust in the fuel tank (fuel on pant leg) a > few > > > week after I got the bike. The carbs looked like they were painted > > > red with the rust particles. I redid the tank with KBS coatings and > > > did a complete carb breakdown and cleaning and the carbs looked > great. > > > I sinked the butterflies manually with the stem of a micrometer and > it > > > ran great. > > > > With the OEM filter It does take a few minutes to warm up or it will > > > want to die at take off. I have a shop manual and reset the pilots > the > > > same number of turn as they were set from the factory. > > > > On Mar 19, 12:27 am, Dennis Hammerl <[email protected]> > wrote:> > > > If you can describe what crap runs like, maybe I can help. By themselves, > > > > K&N filters do not affect anything. Great replacements (sorry > Stanley) > > > Installed properly, they require no rejetting. Mine works fine. > > > > > --- On Wed, 3/18/09, Snookfever <[email protected]> > > wrote: > > > > From: Snookfever <[email protected]> > > > > Subject: [Nighthawk Lovers] 1984 Nighthawk 700s K&N Air > filter > > > > To: "Nighthawk Motorcycle Lovers!" > > > > <[email protected]> > > > > > Date: Wednesday, March 18, 2009, 11:14 PM > > > > > I bought a K&N air filter, but it makes the bike run like > crap. > > What > > > > do I need to do the carbs? > > > > > Looking for a nose cone for my 700S, where can I find one? > > > > > Sincerely, > > > > > Snookfever2- Hide quoted text - > > > > - Show quoted text -- Hide quoted text - > > > - Show quoted text -- Hide quoted text - > > > - Show quoted text -- 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. 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