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philip martinez Posted on Oct 09, 2014
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What would cause a 1999 nighthawk 250cc cbx not to start after changing sparkplugs ?

I recently replaced sparkplugs on my nighthawk 250cc cbx. Was running fine now cant get it to start. Can someone plz. Help

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stephen jessop

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  • Expert 77 Answers
  • Posted on Oct 12, 2014
stephen jessop
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Joined: Aug 07, 2012
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Make sure all the letters and numbers on the plugs are exactly the same some plugs numbers and letters vary but still work, the way they are different is charge and heat settings some bikes work some dont, also make sure you use a torque wrench when tightening your plugs u can never be safe enough!

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paul4_judith

paul

  • 1190 Answers
  • Posted on Jul 22, 2014

SOURCE: will a 750 motor from a 93 nighthawk fit in a 99 nighthawk 250cc cbx frame

if you get both engines side by side then measure the length , hight and width of them and the frame you will see if it will fit in the hole ! Then measure the areas where the engine mounts fit you will see if same or different and what you have to alter ! Anything is possible !!
If it fits in the hole then align temp' and see where the exhaust ports come out near the down tubes of your frame and see if it needs altering ! If frame needs stretching up , down , left or right then when adding tubes use tube inserts to strengthen !! Hope this helps to give you an idear bud ! P...

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son nguyen

  • 5 Answers
  • Posted on Jul 26, 2014

SOURCE: I have a 99nighthawk motorcycle 250cc cbx. That

Your gear switch is bad, also check your clutch. It might not fully release or engage. Also check the clutch cable at the steering.

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I bought a 250cc apollo about 3-4months ago and it had compression and the kick start worked but now I've changed the oil and sparkplug the kick start gets stuck and doesn't go down but drops abit if I...

How much oil did you put in the engine?
Has I started since you changed the oil??
Is the sparkplug the same LENGTH as the one you removed?
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1999 honda. I replaced the sparkplugs on my

if you have these things it should start. are the plugs getting wet this indicates fuel is getting to the cylinder and not just to the carb. you will have to check the carb it could be a dirt problem stopping the fuel getting to the cylinder. if all you did was change the plugs and this happened after you will have to go over every thing you did to make sure you didn`t forget something. have you re-installed the plug wires in the correct order.
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I recently replaced the sparkplugs on my 99nighthawk 250cc cbx. Now it don't start. I got compression, spark, and fuel but still no start. Can someone plz. help ????

try to bump start it , usual thing with motorcycle, is it electric start ? if so battery may not have enough ampage , so kick start or bump
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Will a 750 motor from a 93 nighthawk fit in a 99 nighthawk 250cc cbx frame

if you get both engines side by side then measure the length , hight and width of them and the frame you will see if it will fit in the hole ! Then measure the areas where the engine mounts fit you will see if same or different and what you have to alter ! Anything is possible !!
If it fits in the hole then align temp' and see where the exhaust ports come out near the down tubes of your frame and see if it needs altering ! If frame needs stretching up , down , left or right then when adding tubes use tube inserts to strengthen !! Hope this helps to give you an idear bud ! P...
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Hi, I had shut down my Honda cbx 750 for 3 weeks

Hi and welcome to FixYa,

Initial checks would be for the main fusible link inside the starter magnetic switch. Thereafter, check for the presence / absence of +12 on all the fuses box, main connector, battery + terminal and ignition switch.

A wiring diagram of the Honda CBX750F would be of help as reference. Should you be interested, a copy maybe found here.

Good luck and thank you for asking FixYa.
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