2003 Yamaha Warrior Fuel Delivery Problems, need help

[calypsobikes]

Okay so I put a video up on youtube for audio and visual refferences. I seem to be having some issues with the fuel delivery now. I took my stock airbox off and i am running straight UNI Filters and a 147.5 main jet and the e-clip on my mid throttle pin is all the way down on the 5 notch, making the needle as high as it possibly can go. It seems that no matter what I do the thing runs rough in low to mid throttle, but wide open and idle it runs fine. refer to video. I have a 145 main jet a 150 main jet and a 152.5 main jet. I am at a 1130 feet elevation, no airbox, in the video my quad is currently set up with a 147.5 jet, and e clip all the way down on the pin making it the highest it can go. it sounds VERY throaty and feels like it misses, but I think it might be something else. Thats about the best I can describe it in words, the rest will have to be done by listening to it. Here is the link
http://www.youtube.com/watch?v=dRsan-PPgGE


If you have any suggestions, or know what settings I should be running on my carburetor let me know, I want to take it out riding, now that it is running, and now that the tempurature is below 100 degrees consistently!

Before I was having issues with the stator and the clutch (got those fixed). Now its the fuel mixture/delivery.

 

[1998yamahawarrior]

how many turns is the air screw turned out. what pilot jet are you running. hes some threads that deadlast wrote up on carbs and jetting that might give more ideas to.
http://www.yfm350.com/forums/showthread.php?t=21231
http://www.yfm350.com/forums/showthread.php?t=21877

 

[calypsobikes]

Stock Pilot jet, main jet 147.5 e-clip is on position 5 of mid throttle pin. Pilot Screw is stock 2.25 turns out. It idles fine and has good wide open throttle, like i said in the movie it only feels and sounds like crap in 1/8th-3/4 throttle. It feels like It bogs down. I know that taking the stock airbox off increases the air significantly, so I tried a 150 main jet. it didnt help. Should I try even single position on the mid throttle pin with a 147, then try a 150, or even try to go back to the original one on the quad, which was a 145? How do I know what my settings should be? Oh and I read both of those articles. Not as informative as I would have expected. I checked Dynojet's website and they recommended with a 146 jet at 3000 feet or below, with a modified airbox (well what about NO AIRBOX?) a main jet of 146 well stock jets only come in increments of 2.5 hence 145, 147.5, 150, 152.5. Dynojets are in increments of 2. 126, - 140, 142, 144, 146, 148, 150. Anyways they recommended with a modified airbox a 146 main jet and position on mid throttle pin groove 4, from the top groove being groove 1. and then pilot jet 2.5 turns out. well i dont have a 146, I only have a 145 and a 147.5. I'm thinking I might have success on a 147.5 with the mid throttle pin being at groove 4.

I am not thinking my pilot jet is messed up, because it idles just fine!

 

[deerman2701]

isnt the needle with the e clips control 1/8 - 3/4th of the throttle? did u mess around with that? have you tryed it with the e clip in the middle where it is set at stock?

 

[elwood]

I think you need to put your neddle to the middle position the adjust your air/fuel screw as needed. If it idles fine and 3/4 to wot is fine that only leaves the needle. You have yours set as rich as it goes, and it sounds like it's getting too much fuel to me.

 

[buzzy613]

I think you need to put your neddle to the middle position the adjust your air/fuel screw as needed. If it idles fine and 3/4 to wot is fine that only leaves the needle. You have yours set as rich as it goes, and it sounds like it's getting too much fuel to me.

X2 put the needle clip right to stock and call your local dealerto see what the recomend