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Honda MX & Off-Road Dirt Bikes
CR250 Stumped! I hope you are smarter than me!
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[QUOTE="mdmader, post: 532993, member: 25190"] Look like you've had a lot of help but let me add my 2 cents worth. I have a 91 CR250 that doesn't like to start sometimes. A bike has to have three elements in order to run, fuel, air and fire. I know you have checked some of these, but humor us, we're trying to help. First, you should be running a BR8ES or BR8EG NGK plug and make sure it is new. Take the plug out and set it next to the cylinder and kick the bike over, make sure you are getting a good center spark. If the spark is weak or nonexistent, check the CDI or kill switch. If the Kill switch is bad then it could be cutting off the spark before it gets to the plug. Next, make sure the air filter is clean with fresh filter oil. The filter just needs to be "wet", not dripping. Take out your carb and soak it in carb cleaner overnight. Then take the bowl off and check the float height to see that it is within spec. Make sure that no debris is in the bowl. Next, remove the pilot and main jets and use blast of air to make sure that there isn't any debris in there. Before you put the carb back on, remove the reed cage and check the reeds. There shouldn't be any gaps between the reeds and cage. Check for any chips. If they seem to be in working order, put the reed cage back on along with the carb. Put the carb back into its original settings. If I remember correct, the initial setting for the carb is one and a half turns out on the airscrew. The choke should be six turns out as well. If you haven’t found any issues by this time, you should be ready to give it a try. Hold the kill switch down and give the bike a couple of good kicks in session. Then release the kill switch and give bike a nice long kick from the top. You may have to kick a few times but you should get some indication if it is going to fire or not. If you still can't get it to start, you may want to check the head pipe to see if it is firmly seated. Those bikes have a cheesy ring that can sometimes flatten causing an air leak. My only other idea is that you have a leak down into the case. But this is not indicative of your compression tests. Just a thought. If none of the advice works, then I'm baffled. Good luck and let us know if you resolve your problem. -M [/QUOTE]
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Honda MX & Off-Road Dirt Bikes
CR250 Stumped! I hope you are smarter than me!
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