Honda NX 250 - idle problem - Motorcycle Forum
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post #1 of 6 (permalink) Old 06-25-2008, 11:55 AM Thread Starter
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Honda NX 250 - idle problem

I've recentely bought an honda nx 250 and it was fine until the last few days

She simply won't idle.

At first, i had to keep the choke on 1/4, then it was 3/4

Now she won't idle at all.

I checked the plug, there is spark - plug is clean looks great

I charged up my battery, to make sure it wasn't weak (it was from trying to start it, so i figured it would be a good thing to do)

I checked the gas tank, the gas flows form the tank, checked the hose going from the tank to the carb, that's fine as well

I have yet to check the carb, I am waiting for my friend to come down and maybe take it off to clean it.

This morning i decided to try the bike again, since my friend was the one who told me to charge my battery up - still the same thing

I have to twist the throttle to even get it started, and when I do she revs up really rough (not a complete backfire, but that's the sound it has)

I took the battery off agian, since it went weak again, and I have it charging agian.

I did notice tho, that both terminals on the battery were getting hot - and this was after about 5 minutes of trying to turn the bike over. Is this normal when you're attempting to start a bike that wont start?

Any ideas appreciated
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post #2 of 6 (permalink) Old 06-25-2008, 09:30 PM
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I think you'll find your problem when you finally look at the carb.
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post #3 of 6 (permalink) Old 06-25-2008, 11:18 PM Thread Starter
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Quote:
Originally Posted by cmonSTART View Post
I think you'll find your problem when you finally look at the carb.
LOL! I'm glad to hear that actually!
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post #4 of 6 (permalink) Old 08-14-2008, 01:17 AM
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Remove carb, then remove float bowl.

Get a 4" length of stranded copper wire. You want the kind with *fine* strands. Remove one strand.

There are a number of jets in the bottom of the carb. The big one in the middle is the main jet, but you want the idle jet. It is slotted & can be unscrewed, but you just want to run the fine copper wire through it.

It's plugged up with dirt or varnish. Squirt some *electric contact cleaner* through it to verify it is cleaned (carb cleaner can melt things & is not a good idea if you're not experienced in _when & when not_ to use it).

Replace float bowl. Re-install carb. Make sure throttle goes up AND DOWN. You're back in business.

NX-250 was the best bike I ever owned.
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post #5 of 6 (permalink) Old 08-14-2008, 08:38 PM
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Yes, it is normal for the terminals to get warm if its not starting. I also, believe youll find the problem in your carb. Get it cleaned up and see what happens. Be very careful if you are to try and stick anything through it. If it is tight to push through, dont force it. Its best to blow it out with air or cleaner. How does the intake manifold look (cracked, split, or does it look solid) ? Clean that carb up and repost.
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post #6 of 6 (permalink) Old 04-16-2011, 09:22 PM
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I have an 88 nx 250. I had the identical problem two years ago. I did all the same things you did. I realize it's been a couple years since this thread, but if nothing's been done about it yet, it's your cdi box. nx's are notorious for this. best of luck!
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