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Old 01-12-2013, 02:54 PM   #1 (permalink)
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89 exciter no start

ive cleaned everything, rebuilt the fuel pump, has great spark, and 150psi compression in both cylinders. it will fire once every pull but it wont run at all. it there a spec for the amount of turn the idle screws should be out?
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Old 01-12-2013, 03:46 PM   #2 (permalink)
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First things first. Are the plugs wet? We need to know its getting gas. How old is the gas? Have you tried new plugs? Compression at 150psi is high, don't you need high octane fuel if your over 130 psi?

I don't know the carb setting for yours but my '85 XLV factory setting is 2 1/4 turns out from gently seated for the air screw. Your idle screw should be adjusted so it just idles.
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Old 01-12-2013, 04:24 PM   #3 (permalink)
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The air screw is usually around 1 1/4. How did you get 150 psi? Did you dump oil down the cylinder first? Dump a little gas down the cylinders to make sure it runs. To override the TORS system unplug the wires on the carb and plug the wires on the harness into each other. With gas down the cylinder when you start it do not touch the throttle so the TORS does not kick in. Just in case it is the TORS.
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Old 01-12-2013, 07:56 PM   #4 (permalink)
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i just screwed the tester in and pulled about 5 times and it read 150 on both no oil or anything. i got it to run by gapping the plugs around .010. the air screws are about 1 turn out but its running only on one cylinder for some reason. no spark on the clutch side, but theres a new coil pack so im confused
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Old 01-13-2013, 11:52 AM   #5 (permalink)
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Shouldn't your plugs be gapped closer to 0.028.


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Old 01-13-2013, 01:18 PM   #6 (permalink)
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Thats what i thought too but it wont run right unless gapped smaller.
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Old 01-13-2013, 04:52 PM   #7 (permalink)
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I have never had a yamaha blow a stator. You should find out the colour and the wires to test and the ohms reading to rule out the stator, after you do the coil test like RJ Gleason said.
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Old 01-13-2013, 06:41 PM   #8 (permalink)
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Also double check to see that you don't have gas lines kinked. Done that myself before. From a previous post. Are the plugs wet? Or Dry? After pulling several times.
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Old 01-14-2013, 05:32 PM   #9 (permalink)
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I was reading another thread and a no spark problem was solved by taking the stator connector apart and cleaning it.
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Old 01-14-2013, 06:46 PM   #10 (permalink)
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if your reducing the gap to enhance spark, chances are your coils are weak or poorly grounded, your plug caps are bad, or your plug wires need attention.

i would test the cap resistance prior to replacing them and they are only about $5 each. clip back to fresh wire if you replace them.
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Old 01-15-2013, 10:08 AM   #11 (permalink)
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I fixed it, the new coil pack i bought was bad on one side, so it flooded that side of the motor causing me all the problems
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