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  #11  
Old 01-29-2004, 03:47 PM
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Default Re: 2002 cr250 surging?

     

There is this to check for leaks:

Leak Tester

I had plenty of luck fixing my surging problem. The thing to remeber when the bike is on the stand is that it's in nuetral. When you're riding it and you pull in the clutch cable air will leak down the cable into the ignition cavity in the case. Try wriggling the clutch cable where it enters the case with the bike running on the stand. The R's should go up if you can get air around the cable. Sure sign the seal is leaking.

If you have the puller then you're set. Start by removing the four 8mm bolts that hold the ignition cover on and remove the cover. Hopefully you have an impact gun at your disposal. Use it to remove the 17mm nut that holds the flywheel on. After you've removed the nut (and the washer behind it) you can thread your flywheel puller on. Pop the flywheel off.

Next remove the two 10mm bolts that hold the stator on and gently pull the stator off. When removing your stator you'll notice a mark on the bottom and one on the cases. These are timing marks and need to be lined up when reinstalling the stator. Don't worry though, unless you've notched the bottom mounting hole and played with the timing prior to this then you should have nothing to worry about. You can either set the stator off to the side or disconnect it and remove it, what ever you want to do.

Now you can see the seal. Grab yourself a smallish (1-1/2" or so) wood screw and screw it into the seal. You can use more than one if you'd like (another on the opposite side work well) just make sure you work slowly when getting the screw to grab. After this I heated the case a little with the propane torch and then grabbed the screws with a pair of pliers and pulled the old seal out.

I installed the new seal with a dab of grease and a 7/8" (I think) deep well socket, taking care to make sure that it went in straight and to the proper depth outlined in your manual. After the seal is in the it's just a matter of putting everything back together.

If you have any more questions let me know. Good luck.

Last edited by Faded; 12-03-2004 at 12:41 PM.
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  #12  
Old 01-29-2004, 04:04 PM
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Wink Re: 2002 cr250 surging?

Thanks Faded!

Here's my plan... I'm going to start/warm the bike up to operating temps. Next, I'm going to remove the ignition cover while the bike is running. If I have a leak, the rpms should rise slightly as soon as I loosen the cover and air can leak in! Don't worry, I'll be carefull not to get my fingers/hair/shoelaces/toes wound up in the flywheel!

Does this sound correct? Anyone have any other advice/input?

Anyhow, I'll probably try this over the weekend. I'll post the results on Monday. I'm also going to build the leak down tester to rule out any other possibilities.

I'm running the V-Force reed cage and I'd like to verify that there are no leaks there as well.
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  #13  
Old 01-29-2004, 04:09 PM
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Question Re: 2002 cr250 surging?

One more question for you, Faded! Did you make your leak down tester for your '02 CR250? Can I use the same size plug and fitting as in your directions? I wouldn't want to have to measure and do any work myself. Man, I'm getting lazy these days!
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Old 01-29-2004, 04:09 PM
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Default Re: 2002 cr250 surging?

Quote:
Originally posted by tomnelsonii
I'm running the V-Force reed cage and I'd like to verify that there are no leaks there as well.
That's a good idea. They tend to leak...
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  #15  
Old 01-29-2004, 04:12 PM
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Default Re: 2002 cr250 surging?

Quote:
Originally posted by tomnelsonii
One more question for you, Faded! Did you make your leak down tester for your '02 CR250? Can I use the same size plug and fitting as in your directions? I wouldn't want to have to measure and do any work myself. Man, I'm getting lazy these days!
Yep! Don't worry, I did all the work for you. The exhaust plug is a tight fit but works great.
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  #16  
Old 01-30-2004, 12:51 AM
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Default Re: 2002 cr250 surging?

Once you guys are done here, we need to move this to the knowledge base. This is some awesome info. Faded, you never cease to amaze me.
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  #17  
Old 01-30-2004, 11:40 AM
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Default Re: 2002 cr250 surging?

Although I really wish my problem was my crank seal I'm 99% sure it's not. The reason I say that is isn't is that If I remove the ignition cover the RPMs do not increase and and If I spray carb cleaner behind the flywheel while running nothing is getting sucked in and killing the engine. With that said I will probably replace the seal anyway and see what happens (faded- thanks for the replacing info!). I'm stumped with this problem and I can't rule out an air leak elsewhere or even jetting. The reason I say jetting is that the surging gets worse with colder temperatures. But on the other side of the coin the surging doesn't happen until the enging gets warm????? This sucks!
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  #18  
Old 01-30-2004, 12:13 PM
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Default Re: 2002 cr250 surging?

Quote:
Originally posted by dodgeaspen
I have an 02 with the same exact problem.
dodgeaspen,

Just going off what you said here I figured that you were having the same problems (i.e. surging w/clutch action). If you don't think that it's your seal and that it might be jetting then we can tackle it from that aspect too.
Just a few questions;
[list=1][*]Can you ride right now? (No snow)[*]What is your elevation and current temps?[*]What needle/clip position are you running? (Stock needle = 6BEY30-74 or 6BEY30-73, need to find out which one it is.)[*]What gas and premix ratio do you run?[*]When was the last time you checked your float level?[/list=1]

I notice a couple things that don't quite seem right w/your above specs mentioned earlier but I'm going to wait until you answer these questions first.

Thanks,
Andrew
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  #19  
Old 01-30-2004, 09:29 PM
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Default Re: 2002 cr250 surging?

I've got some snow but I'm still able to ride.

I'm at around 700 ft and 25 degrees. I'm running a s-8 nozzle, 430 main, 6BEY30-71/3rd Clip, 35 pilot, AS 1.25 turns. I'm running 92 octane with Yamalube R at 40:1.

I checked the float level about 6 months ago...right on at 15mm.

I'm pretty sure that the problem would go away if I changed the pilot to a 37.5 but then closed throttle would load up rather fast.


Thanks for the help!,

Eric
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  #20  
Old 02-02-2004, 11:25 AM
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Default Re: 2002 cr250 surging?

Quote:
Originally posted by dodgeaspen
6BEY30-71/3rd Clip
Eric,

This isn't an optional needle. The richest needle that you can get from Honda is a 6BEY30-72. Could you double check your needle?

Also, I'm sorry but there is something wrong...you are really rich. How do your reeds look? If they're okay then I think you need to start checking for airleaks else where.
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