mmartin
02-11-2007, 10:22 AM
I have had a few 400ex's now so the jetting in my climate/elevation is nothing new to me. I have a 99 400ex and now an 05 400ex. Both have aftermarket slip ons, 42 pilot, can't remember the mains but thats not where my problem lies.
On the 05 its still a pain to start unless the engine is already warm. I had an 04 with the same problem and my 99 did as well. As soon as I dropped in the 42 pilot, moved the clip and adjusted the A/F they were perfect. The only difference I can think of is the needle. I put the 42 in, adjusted the A/F out 2 3/4 turns as a starting point and have been playing with it since. I just cant seem to get it right. Once the bike is running its perfect. It doesn't backfire, flood or bog. It just won't idle to warm up unless you sit on it to catch the rpm's as they drop. I can turn the idle up but I have to turn it up way too high to keep it running. I'm kind of anal about my bikes running perfect.
Has anyone else had this problem? Is it worth it to spend the 65 on the dyno jet kit so I can get the new adjustable needle or have others been successful without it? I'm not trying to be cheap I just dont want to replace parts that don't need to be replaced and end up with a bigger headache afterward.
One more thing, anyone know where I can get an extended A/F screw for the 400ex? I have checked bikebandit, Rocky Mountain, Ebay etc none seem to have one.
On the 05 its still a pain to start unless the engine is already warm. I had an 04 with the same problem and my 99 did as well. As soon as I dropped in the 42 pilot, moved the clip and adjusted the A/F they were perfect. The only difference I can think of is the needle. I put the 42 in, adjusted the A/F out 2 3/4 turns as a starting point and have been playing with it since. I just cant seem to get it right. Once the bike is running its perfect. It doesn't backfire, flood or bog. It just won't idle to warm up unless you sit on it to catch the rpm's as they drop. I can turn the idle up but I have to turn it up way too high to keep it running. I'm kind of anal about my bikes running perfect.
Has anyone else had this problem? Is it worth it to spend the 65 on the dyno jet kit so I can get the new adjustable needle or have others been successful without it? I'm not trying to be cheap I just dont want to replace parts that don't need to be replaced and end up with a bigger headache afterward.
One more thing, anyone know where I can get an extended A/F screw for the 400ex? I have checked bikebandit, Rocky Mountain, Ebay etc none seem to have one.