I have a 03 CR 250 and have been trying to solve a bogging issue. The bike always fires right up. Never a problem cranking. I'm wondering if it's running too rich. Here's the issue. I can fire it up and it will always need to be rev'd "hard" to clear it out then I can take off with tons of crisp power from low rpm to wide open. After clearing it out, I can take it easy riding around the trails for a couple of minutes and then I get on it trying to wind it out, I get the bog again and have to clear it out again. If the bike has been sitting a for a while, I crank it, let warm up for a few minutes, I can jump on it and i get the bog until I rev the piss out of it or get on a long straight away where I can wind it out. The bottom line is I have to be in a riding situation where I can constantly get on it or I'll get back to the lower end bog.
The topend has been rebuilt and the exhaust valve was removed and cleaned. I also checked the servo for opening and closing the exhaust valve. When I bought the bike it had had a Pro Circuit pipe, FMF Shorty, and VForce Reeds.
I recently ordered a JD kit.
What I have tried:
-I tried different size jets
-I checked the float level
-Tried a new spark plug
-Cleaned carb and air filter
Tried since ordering the JD Kit:
-400 Jet (JD Kit)
-White needle 3rd slot from top (JD kit)
Tonight I have pulled the needle and moved the clip to the second slot from the top of the needle. I will be taking it out this weekend to do some testing.
Are there any ideas from anyone that I can try this weekend?
Any advice would be great. I have never owned one that required this, so i'm wondering if there's a larger issue.
I will say this, when it's cleared out, it will scream. Tons of crisp power.
Thanks,
Brad
The topend has been rebuilt and the exhaust valve was removed and cleaned. I also checked the servo for opening and closing the exhaust valve. When I bought the bike it had had a Pro Circuit pipe, FMF Shorty, and VForce Reeds.
I recently ordered a JD kit.
What I have tried:
-I tried different size jets
-I checked the float level
-Tried a new spark plug
-Cleaned carb and air filter
Tried since ordering the JD Kit:
-400 Jet (JD Kit)
-White needle 3rd slot from top (JD kit)
Tonight I have pulled the needle and moved the clip to the second slot from the top of the needle. I will be taking it out this weekend to do some testing.
Are there any ideas from anyone that I can try this weekend?
Any advice would be great. I have never owned one that required this, so i'm wondering if there's a larger issue.
I will say this, when it's cleared out, it will scream. Tons of crisp power.
Thanks,
Brad
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