I Have A 1990 Ktm 250 Exc. It Has A Severe Low End Bog, Have To Ride The Clutch All The Time On Tight Trails. Has New Boyesen Power Reeds. What Can I Do To The Carburetor To Make It Run Right?
send it to Eric Gorr for the port and polish job.With his prices it seems like that would be the cheapest way to go to get the best performance out of your bike.
The Boysen power reeds will change your bikes fuel delivery, usually making it run richer, especially on the main jet. Go to Boysen's website and find a rough starting point/jetting recommendation. But Okies right, your going to have to learn to jet your carb!
Your powervalve may have crapped out. Take it apart clean it replace bearings if necessary. Same thing happened to my 300. All of a sudden it was like a 125. Once you got into the revs it ran OK. But down low nothing and would bog and die.
If you have good top end your power valve is working or stuck open. If it is stuck open you wont have any low end. If the pv is working then your jetting is off. Check the pv first, if its working then you need to change the jetting.