04*05 Yamaha Raptor 50
guitars911
DieselTech posted this in response to a similar issue on another thread last week, it might help you out:
"Actually, you could need a larger pilot jet * I think the stock one is a 12.5. Before you try that though, look on the left side of the carb for a small rubber plug above the idle set screw. Pop the plug out and adjust the pilot screw (you'll see it once you get the plug out). You will want to turn it counterclockwise (I think) to richen up the idle mixture. Turn it 1/4 of a turn at a time, and keep track of how far you turn it. Also, warm the machine up before you make these adjustments, and make sure the choke is off properly * these machines' choke levers actually can be turned too far towards the off position and it causes problems * you should turn it just until it hits the detent, it will go a little more than that , but that's too far.
No air leaks at the carb boots, right? The main jet doesn't meter air at idle, so that's not your problem. Rule of thumb for the pilot jet is that if you have to turn the pilot screw out more than 2 1/2 turns (from all the way in), you need the next larger size jet.
Hope this helps. Let us know how you make out. "
after i did the slide mod , i playes with these adjustments, it works, just havent quite got the combo perfect!
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