kiwiaudio

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About kiwiaudio

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    Ohio
  1. Thanks Who Whu, You've given me something to think about. Its possible the one cylinder is flooding while sitting. The only reason I doubt this is that this bike has a vacuum controlled fuel petcock and I've checked that it works. Therefore there cannot be an endless supply of gravity fed fuel to a carb with a bad float valve ! But i'll definitely check the float system a lot closer. Sure wish I had an understanding of what is happening when I pull the choke. It has to be enabling more fuel into the venturi somehow. Man - You are so right about those damn air intake boots. To get mine to fit at all, I have to leave the carbs out of the manifolds about a 1/4" ! They are so hard, I cannot hardly manipulate them at all. Almost went to pod filters ! Incidentally, motorcylecarbs.com,Inc , wanted me to send the carbs to them and they would take care of this for a cool $500. Right around what the old bike is worth !! They were talking ultrasound and a bunch of bull ! What is the cleaner/solvent called that I need to look for?
  2. Here is a link to a neat site that will show you how the 700 fits in with the history of the Honda Nighthawk. http://www.hondanighthawks.net/index.htm?
  3. I can definitely relate to having to play with the choke, and my feeling is that the four choke pistons are not working in unison, especially the cylinder that fouls out. Did you ever remove these? whats in there? is the piston seat replaceable, adjustable etc.? Its not the battery, its new and strong !
  4. I have also traded spark plugs, interchanged plug wires, and coils trying to see if there is an electrical breakdown somewhere with a cold load start. Compressions are also good and uniform throughout all 4 cyls. I remember now how I could feel the cold header pipe on the dead cylinder. The other three get hot instantaneously.
  5. yes, as far as I can tell, if i hold the choke on too far or too long, the one cylinder will foul the plug. Its running so rough at this stage that its hard to tell if 1 or more cyls are screwing up. I have pulled the plugs before it clears and found just the one fouled though. It finally comes around, but consequently I'm revving the old girl far more than I want to on a cold start. It will start great all day long when warm just so long as I don't touch the choke !
  6. This bike is hell to start, but runs fine when warm! I can easily foul out cyl #2 trying to get the choke in the right spot. I was told that there is a fairly simple "richening system" that is the "choke" on these carbs. I'm assuming the choke rod is lifting a needle in each carb. My question is - Can the needles "seat" be replaced? I bet they are wasted and letting inconsistent amounts of gas through. Do I have this right ? Love to hear how this is done, and any other ideas anyone may have on the subject.
  7. The float needle and seats are new. The carbs were overhauled before I aquired the bike a year ago, according to the previous owner. I pulled the carbs to inspect after this problem was immediately evident, and found everything I looked at in great shape. I obviously missed something though as the problem was still there when reassembled. I would think if it had a float issue, it would be evident all the time? She runs great when warmed up !
  8. Nope, those are good too.
  9. There are no butterflys in these carbs, main needle and jet are fine, floats have been set.
  10. This bike is hell to start, but runs fine when warm! I can easily foul out cyl #2 trying to get the choke in the right spot. I was told that there is a fairly simple "richening system" that is the "choke" on these carbs. I'm assuming the choke rod is lifting a needle in each carb. My question is - Can the needles "seat" be replaced? I bet they are wasted and letting inconsistent amounts of gas through. Do I have this right ? Love to hear how this is done, and any other ideas anyone may have on the subject. Kiwi.
  11. I've never used these pod style air filters before and need to hear from someone who has. I'm having trouble getting the hardened intake boots on an '84 650 nighthawk to match up to the carbs, and may consider going with these pod filters if a recent idea does not work. Do these filters make that loud suction noise when you are on the gas, and are carb adjustments going to be necessary?
  12. Now, why didn't I think of that ? I think I'll combine your idea of connecting the intake boots first with another guys idea of heating them up with a hairdryer/ heat gun, before i put the carbs into the intake manifold. Thanks guys !
  13. '84 650 nighthawk. I cannot get the airbox to slide close enough to allow the intake boots to attach to the carbs correctly. Its close, but not close enough. What is the trick here ?
  14. I was born and raised in New Zealand in 61. This country is dirtbike heaven and i worked my way through a Yamaha DT175, Suzuki Rm250A that I hung a road kit on for some stupid reason, Yamaha TT500 purchased from a local top class enduro racer (he had modified the engine and it was unreal!) to a Kawasaki KLX250, before I was 21 and headed to the USA in 82. I have not owned a bike since until 3 weeks ago I stumbled onto a guy wanting to part with a 75 Honda CB550 and a 79 CB650. Found this website and there you have it !
  15. Started on a Yamaha DT175, 1975 I think. I was 15 and crashed it on the test drive and bought it out of necessity !! Broke the bars, levers etc. walked it back to the owner and said i'd take it. I remember thinking this was the fastest thing on the planet ! "look Mom, new toy and new scrapes & bruises" She was one happy camper ! Young, stupid, ignorant - I heard them all, and have to agree !