44oEX
12-21-2010, 05:01 AM
Hey
I`m fixing up a 400ex for a friend. It just won`t idle at all. At first I figured the idle was just set to low, but now we have the adjustment all the way and still no go. So there is obviously something wrong.
The lack of idle also makes it really hard to start. And onces it does, if you give it some gas, smokes black quite a bit. But the jetting is spot on, if not even a little on the lean side.
Carb is clean, spark plug is new. I was guessing weak spark so we swaped the coil, CDI, and even carb from another EX with no luck.
Valves are set properly. The only thing is that I noticed a little bit if carbon in the intake, so one of the valve is leaking. But I really can`t see that making it not idle. (I know it should still be fixed)
Any more ideas as to what the heck the problem could be?
I`m fixing up a 400ex for a friend. It just won`t idle at all. At first I figured the idle was just set to low, but now we have the adjustment all the way and still no go. So there is obviously something wrong.
The lack of idle also makes it really hard to start. And onces it does, if you give it some gas, smokes black quite a bit. But the jetting is spot on, if not even a little on the lean side.
Carb is clean, spark plug is new. I was guessing weak spark so we swaped the coil, CDI, and even carb from another EX with no luck.
Valves are set properly. The only thing is that I noticed a little bit if carbon in the intake, so one of the valve is leaking. But I really can`t see that making it not idle. (I know it should still be fixed)
Any more ideas as to what the heck the problem could be?