brianC400X
08-31-2003, 02:14 PM
I've got a 01 400ex. Its got a full Yoshi, no air box lid, and a k&N.
A while back I took the choke out and ran a 42 pilot jet for a while. I couldnt get it to run right so i put the stock 38 pilot back in.(though I left the choke out) After a few weeks I went back to the drawing board on my jetting. I knew I could go a little further. I went with a 40 pilot. I lowered the needle clip one notch and I put a 158 mainjet in. I got it in the sand and got it dialed in. There was quite a bit more power though I knew i was probably rich somewhere still. I rode hard for 3 days and it ran great. Last night it started cutting out and spitting out clouds of raw fuel. At the time I'm thinking too rich on the mainjet fouled the plug(because you spend more time wide open than anything else on the sand). Today I put in a brand new spark plug in it and It didnt correct anything. It still cuts out and spits raw fuel.
A while back I took the choke out and ran a 42 pilot jet for a while. I couldnt get it to run right so i put the stock 38 pilot back in.(though I left the choke out) After a few weeks I went back to the drawing board on my jetting. I knew I could go a little further. I went with a 40 pilot. I lowered the needle clip one notch and I put a 158 mainjet in. I got it in the sand and got it dialed in. There was quite a bit more power though I knew i was probably rich somewhere still. I rode hard for 3 days and it ran great. Last night it started cutting out and spitting out clouds of raw fuel. At the time I'm thinking too rich on the mainjet fouled the plug(because you spend more time wide open than anything else on the sand). Today I put in a brand new spark plug in it and It didnt correct anything. It still cuts out and spits raw fuel.