whats up fellow riders.i have an 03 660.no lid,full yoshi exhaust,k/n power adapter(think thats what its called).replaced jets to 155/160 and installed 25 pilot.i seem to be having problem with a/f mixture screw.everything was pretty muchbut it seemed i was missing throttle respose through my lower to mid power band.i tried moving the clips around,but it didnt help me.so i touched on the a/f screws on bottom of carbs.it just seems to keep getting worse.im in florida(right between daytona and orlando) and i was trying to read the chart that was posted with sea level,clip level,a/f turns,intake,motor work etc.can anybody possibly help me with the information that i have provided.thanks ??? :help:
put the lid back on and see if the problem goes away, then you know it is mixture.
I would expect the needle clip to be moved down a spot or two. Maybe in the center position. Effectively moving the needle up earlier when you nail the throttle..... jet sizes sound okay.
ok cool.the clip is in the 4th spot on the needle.i have tried the 3rd also(from the top).i have the a/f screws at approx 2.75 turns from seat.i will leave the current settings and put lid on.
no chance it is bad gas?
no offense, happened to me one year. Made the old 660 sputter then take off.
nah,changed that too.i did put in new spark plug also.maybe that could be it
Too much fuel, 25 pilots + 2.75 on the screws is too much fuel on the bottom end. Add that to a needle on the 4th clip and you're fat all the way through low range and a good bit into mid. Unless you've got an airleak somewhere, you're likely too rich.
Try backing down to 1 on the fuel screws and move up from there. You can start with the needle on whatever clip you have it on now, and if doesn't work switch to the 3rd/4th (whichever one you didn't start on) and try it again.
For future reference the screws are fuel screws, not necessarily mixture or a/f screws. Turning them in decreases fuel provided, turning them out increases fuel provided.
ok thanks for that info.i really needed the help.im gonna get twerkin on that.will post back
good idea to listen to MadDog :thumbs:.