Recent content by Oleschool

  1. Oleschool

    1979 Front Caliper Part Crossover

    Thanks for the info on this. I'll err on the safe side as I live in a remote town where it takes forever to get shipments.
  2. Oleschool

    1979 Front Caliper Part Crossover

    I broke the bleeder screw on my caliper and can't get it out. I've begun to search on Ebay and was wondering what other Yamaha used this same caliper. Will one from an XS650 work? Or better yet does anyone have one for sale?
  3. Oleschool

    RPM hesitates after 5k

    I went to the extreme end of the needle and set the clips in the first groove. It got rid of my stumble. I think this is the first time the bike has been able to rev past 8k.I'll try the second groove tomorrow hoping it might be a little better. I'll also order some smaller jets.Thanks Chris
  4. Oleschool

    RPM hesitates after 5k

    Yes that's exactly how it is
  5. Oleschool

    RPM hesitates after 5k

    Thanks I'll try that. No I haven't sync'd the carbs. Is there any chance that my problem could be lack of flow through the petcock? It was leaking fuel so I modified it so it didn't need vacuum to open. The bike starts idles and runs great to about 5k-5500 rpm then it stumbles. Also if I'm...
  6. Oleschool

    RPM hesitates after 5k

    I adjusted the valves, cleaned the carbs replace the torn factory air filters with new aftermarket stock style filters. I tried increasing the main jet to a 140 because it had 135s and the 137.5s were out of stock. Just took it for a ride and the same. I raised the clips on the needles from 3rd...
  7. Oleschool

    Loss Of Power Over 5k RPM

    I've got a similar problem.5500 and up it falls on its face. Carbs cleaned, tried larger jets and even replaced the tci with another used one but same thing.
  8. Oleschool

    RPM hesitates after 5k

    I've had this problem on my 400 for a couple years and still cant figure it out. I tried increasing my main jets but its still the same. I'm wondering if the vacuum diaphragms aren't working properly??
  9. Oleschool

    Hard to Start and will not Rev

    The resistance of my pulse coils checked out ok.It is supposed to be 700ohms and mine are both around 720ohms. I figured this would point to the TCI.I ordered one from EBay and installed it last night only to find the same thing happens.What can it be?
  10. Oleschool

    Hard to Start and will not Rev

    I edited this post because I realized I had used info from a newer model bike which may have been wrong.I will double check the resistance of the pick up coils and post results.
  11. Oleschool

    Hard to Start and will not Rev

    I'll check the plugs,but the bike will start again after sitting for a while.I chose to idle it rather than taking it for a cruise and having it die on me.
  12. Oleschool

    Hard to Start and will not Rev

    I did not check the resistance on the secondary side of the coils and should have.I'll do that tomorrow.
  13. Oleschool

    Hard to Start and will not Rev

    I found a hole in the intake boot so I replaced it along with the air filters.The bike fired up nicely and then started to sputter after about 15 minutes of idling in the yard.I checked the fuel levels while it ran and as soon as it stalled and they were good.There was no spark at either plug.I...
  14. Oleschool

    Hard to Start and will not Rev

    I found a couple of things wrong with the carb yesterday.When I removed the two pilot needles,only one had a spring in it,yet they were both out about 1-3/4 turns.IMO the spring when bottomed out would add a dimension that would not be there for the pilot without the spring.Basically the two...
  15. Oleschool

    Wiring Diagram Needed - 1979 XS400

    Check out the link provided earlier in this string.
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