99yam40's latest activity

  • 9
    99yam40 replied to the thread 2 vent plugs?.
    if you read his #2 post, the top hole is labeled fill level. I see OP posted while I was posting, and he covered what was said
  • 9
    99yam40 replied to the thread 2 vent plugs?.
    I would like to know what the middle one is there for.
  • 9
    99yam40 replied to the thread 2 vent plugs?.
    A pic of what you are talking about would help. sounds like you have a drain, vent, and fill level, and I never heard of this. giving...
  • 9
    99yam40 replied to the thread 1986 Suzuki DT75.
    good to hear. I am sure there is a pilot mixture adjustment screw on each carb somewhere just like on my Yamaha you can fine tune the...
  • 9
    99yam40 replied to the thread Please help with HPDI issues.
    the O2 should tell the ecu if it is running rich
  • 9
    99yam40 replied to the thread 1986 Suzuki DT75.
    I am not a Suzuki guy, but you need to find a service manual for your motor. You should have a service manual for all motors you own if...
  • 9
    99yam40 replied to the thread Please help with HPDI issues.
    what tells the ECU the motor is getting proper fuel on these motors? does it have an O2 senser? maybe nothing. it depends on the High...
  • 9
    99yam40 replied to the thread Please help with HPDI issues.
    those motors limit RPM in neutral by cutting off more cylinders that just the 2 it drops in neutral make sure the motor knows when you...
  • 9
    99yam40 replied to the thread Please help with HPDI issues.
    if that is true, then I would be looking at fuel pressure being too high or what is telling the ECU that it is running lean making it...
  • 9
    99yam40 replied to the thread Yamaha S200TXRU.
    The U says it is a 96. not sure what you mean by plug and play with a injected motor
  • 9
    99yam40 replied to the thread 25 HP Yamaha 4 stroke backfire.
    so moving the throttle does not move the plunger? it was just a guess since I have not worked on that motor myself. sometimes running...
  • 9
    99yam40 replied to the thread 25 HP Yamaha 4 stroke backfire.
    I guess you removed the plug so you could remove, clean, and adjust the pilot screw. that plunger mechanism has me thinking that maybe...
  • 9
    99yam40 replied to the thread 25 HP Yamaha 4 stroke backfire.
    is this a carbed motor or injected? giving all motor model ID info helps heck we have no idea what year even
  • 9
    99yam40 replied to the thread 2009 yamaha 225hp no power.
    as always, start with compression, then test spark and the timing of that spark if all of that is good then you are left with a fuel...
  • 9
    99yam40 replied to the thread F115 - no signal to #2 injector.
    sounds to me like Boscoe says the injectors should have power all of the time but the ECU fires them by furnishing the ground
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