starting problem

Discussion in 'Yamaha 250cc In-Line 4's' started by frog, Oct 26, 2011.

  1. frog

    frog New Member

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    fuel hose was leaking,changed the hoses and fuel tap, now it wont start, filter is fairly clogged so i removed it just to see will it start without it but it still wont ,the fuel seem's to be goin a far as the carbs but no more???????????????????????????/
     
  2. brad1

    brad1 New Member

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    Undo the screws on the carb bowls and see if there is fuel there?
     
  3. frog

    frog New Member

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    ya theres fuel in them i just checked there
     
  4. brad1

    brad1 New Member

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    It's a little hard to comment further without knowing a little more info- has the bike been sitting long, or is it used regularly. Did it have issues before. Is there an unrelated issue- such as spark issues.

    Also when you take the screw/s out of the bowls therefore emptying them, if you get the fuel pump working (cant remember whether these prime as soon as the ignition is on or when cranking) does fuel run from the carb bowls
     
  5. frog

    frog New Member

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    its been sitting up a around 2 months, just after i had carbs cleaned was running fine and i used to start it every couple of days but i noticed the leak in the hose so i changed them an it wont start now
     
  6. brad1

    brad1 New Member

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    Change your fuel
     
  7. dontz125

    dontz125 Active Member

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    Yup - modern fuels go flat FAST.
     
  8. dave

    dave Well-Known Member

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    Just a final check - shut fuel valve, drain your carbs, leave the drain valves open, open fuel valve turn on ignition. You should get a flow out of all for drain valves.

    That is no guarantee that the carbs are not flooding as there may be "gunk" stuck in the float valves, making them stay open. Best bet would be to pull the float bowls off and (one at a time) unscrew jets and float valves and check they are clear.
     

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