I am no mechanical doctor please confirm my diagnosis
Posted October 27, 2001 - 01:39 PM
The air box lid is removed and I have a YZ throttle stop in. I have a Baja Designs exhaust baffle. It has always started on the second kick and if I dumped it w/the hot start it would start on the first kick. So I have never made any jetting changes.
I cleaned the carb and raised the needle two clips. My thought was that it has been running a little rich and the plug was starting to foul. It is in the basement for the winter so I will not be testing the jetting change until spring time. I have rode it when it was colder out then now and it ran fine. I am wondering if I am heading in the right direction for the fix.
Posted October 27, 2001 - 03:12 PM
put it back as was.
Posted October 27, 2001 - 06:09 PM
Take it back to clip no.3 and if still no go, try no.2. Everyone seems to be running too rich.
Posted October 28, 2001 - 12:22 AM
I know the 2000/2001's use a completely different setup for the AP.
Posted October 28, 2001 - 04:12 AM
It sounds like the bike was running a little rich due the the plug and pipe?
Start with leaning out the needle jet one clip not two?
I did clean the carb thoroughly. It did have a very thin layer of black film on it. I could see this by rubbing my finger on the slide or throat and there would a small amount of this residue on my finger.
Posted October 28, 2001 - 01:11 PM
if i understand you correctly finglan, what you're saying is that you put the needle up two clips (so you moved the clip down the body of the needle?) this made it ridher and the bike ran worse?
you then say that you raised the clip two places and this leaned it?
look, from your original diagnosis you should drop the needle down one clip from whatever you started with, OK.
we'll help if we can.
[ October 28, 2001: Message edited by: Taffy ]
Posted October 29, 2001 - 05:17 AM
I looked in the manual and read, to lean the bike out to raise the clip. So I raised the clip up two posistions ( not the needle ). The clip is now further away from the pointy end of the needle. I assume this would allow the needle to seat further down allowing for less gas to flow.
I guess what I am trying to confirm is the following:
If the bike was running a little rich it would begin to foul the plug over time and I would have the symtoms I described. A bad sputter at a constant throttle postion. Alot of carbon on the plug and pipe.
If I should start at the needle jet to correct this.
Posted October 29, 2001 - 10:31 PM
if you don't mind i'm sure we'd like to know you're full jetting details if you can find them.
some of the 426 runners are on clip 2 and counting also they're using the 42 pilot jet so you might feel inclined to join them.
one things for sure, if the only cure is to whack the throttle you're rich.
another thing to remember is that the needle richness is controlled as much by the MJ as the needle clip position with this carb.
so review you're MJ size. to find out if you're getting the clip right on the needle accelerate to flat out on a smooth road and then close the throttle for two seconds then gas it up again. you'll soon know whether it's right.
Posted October 30, 2001 - 03:38 AM
Thanks, I do think the clip is now on posistion #2. The rest of the settings are stock.