1. Having trouble logging in? Try closing your browser and re-opening it. If that doesn't work, try a different browser or device. The site will be updated soon to resolve these browser issues.
    Dismiss Notice
  2. Dismiss Notice
  3. Want an XS400.com t-shirt? Go to the store to order. Limited sizes and quantities available.
    Dismiss Notice

My XS 400 Cafe Racer Project

Discussion in 'The Garage' started by trzcina2, Nov 16, 2013.

  1. LuckyEight

    LuckyEight Head-scratcher

    I'm too far from being experienced with carb tuning. But these foam layers seem to be too thick. Foam pods are hollow inside and oiled. Do you think there is enough of air flow inside?

    Are these pods K&N or one of these cheap ones? There is a lip inside some of these pods...which could block the passages on the filter side.
     
  2. trzcina2

    trzcina2 XS400 Enthusiast

    88
    4
    8
    Poland
    Thanks. These are original K&N filters. They cost a LOT so i'm trying to get them work properly no matter what :)
     
  3. LuckyEight

    LuckyEight Head-scratcher

    I found some carb setup in Sandrew's build thread (cheap pods and same mufflers as yours):

    "Balanced the carbs and the engine is running great overall, no hesitation, backfiring and starts right up in every condition. As the carb config is the most searched topic on the forums, here's my setup with freeflow exhaust and filters:

    *needles on the highest position
    *stock 42.5 pilots (tryed 45's, huge mistake)
    *145 mains"
     
  4. trzcina2

    trzcina2 XS400 Enthusiast

    88
    4
    8
    Poland
    Thanks, That's great!

    I'm wondering what needles on the highest position means. Highest means rich mixture or lean mixture?

    [​IMG]
     
  5. LuckyEight

    LuckyEight Head-scratcher

    I suppose that means clips on #5 = highest needle position = richer

    And this is what I found on xs650 forum:
    "Raising the needle only richens the midrange and a bit of the lower main (and upper idle) circuit" But I am carb noob atm so...:shrug:
     
    Last edited: May 28, 2015
  6. xschris

    xschris XS400 Guru Top Contributor

    Put just the pod on the H-pipe WITHOUT any foam stuffed in them. :wink2:
     
  7. trzcina2

    trzcina2 XS400 Enthusiast

    88
    4
    8
    Poland
    Tried that. No big difference :)

    Bike was a bit easier to start but, lacked power on high rpms and after it warmed up, idling was poor and sometimes it died.

    I'll try Sandrew's setup without any foam :) and let you know! I'll also try new carb setup with H-pipe and also let you know :D

    Keep your fingers crossed!!

    Thanks for the input!!
     
  8. xschris

    xschris XS400 Guru Top Contributor

    What do you have the idle mix screw set at with the ( non stuffed) pods on the H-pipe?
     
  9. trzcina2

    trzcina2 XS400 Enthusiast

    88
    4
    8
    Poland
    I don't remember... I tried different settings around 3 turns out, but i don't remember current position.
     
  10. xschris

    xschris XS400 Guru Top Contributor

    It makes a difference. On my 80 the idle is not as good at three turn but perfect at 4. Even with 45 pilot jets.
     
    Last edited: May 29, 2015
  11. bcware

    bcware Well-read Top Contributor

    For whatever it is worth my 1978 with pods on the carbs (no h-pipe) and a 2-1 exhaust requires that I turn the idle speed up a bit for quick and easy starts. Once the bike warms the idle speeds up and I have to lower it again. If I do not adjust the idle like this it is difficult to start when cold. Other than this it runs very well. I was adjusting jets like crazy to fix this, but in the end, for me, it was just an idle speed being too low on cold starts. Now it is 1-2 kicks after winter storage to start it.

    Bigger jets can actually hurt the performance; I am not too far above stock (1-2 sizes at most); beyond that it would just bog down the engine at high rpms.
     
  12. MrYeats

    MrYeats XS400 Addict

    seems like you need a bigger pilot jet or adjust the needle on the slide
     
  13. trzcina2

    trzcina2 XS400 Enthusiast

    88
    4
    8
    Poland
    Still fighting with carbs but.....

    MY SPOKE WHEELS ARE FINALLY DONE!!!

    It took over 6 months to get them finished but damn... it was worth waiting!!!

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
  14. levdir

    levdir Rounded bolt brigade

  15. trzcina2

    trzcina2 XS400 Enthusiast

    88
    4
    8
    Poland
    Hello everyone!
    Its been a while since my last login here :) My xs400 still running fine and i use it on daily basis when weather is great. Some time ago, while i was fueling my bike, some guy asked me: "Hey do you want some pro photos of your bike?" i said yeah sure! So here are some photos:

    _MG_9265a (Kopiowanie).jpg _MG_9286a (Kopiowanie).jpg _MG_9294a (Kopiowanie).jpg _MG_9411a (Kopiowanie).jpg

    Anyway i was brought to this forum because i need help.... again :) i would like to replace two separate units - voltage regulator and rectifier with one combo unit similar to this: https://www.amazon.com/Caltric-REGULATOR-RECTIFIER-1978-1985-MOTORCYCLE/dp/B009ZWO6R2
    I bought one but i only have 7 wires and my original setup has in total 8 wires (5 from rectifier and 3 from voltage regulator). Is it possible to addapt this new unit to xs 400 sohc electric circuit? I should mension i have pamco electronic ignision.

    Cheers,
    Maciej
     
    Giannis, Cafe and motoTrooper like this.
  16. motoTrooper

    motoTrooper XS400 Addict

    Beautiful result, hope you are enjoying it
     
  17. Cafe

    Cafe XS400 Member

    Beautiful bike.
    I follow RacerTV and a lot of beautiful café racers come from Poland.
     
  18. trzcina2

    trzcina2 XS400 Enthusiast

    88
    4
    8
    Poland
    Hello, thank you! But anyone can help with my question? Is it possible to use Rectifier/Regulator combo on SOHC engines? My lights are getting brighter when Im opening throttle, and dimmer on idle.
     

Share This Page