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400ex jetting, continued.

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Old Aug 23, 2004 | 10:35 AM
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Trailblazer
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Default 400ex jetting, continued.

Ok so I am at the point where the machine is rideable, but needs jetting "tuning".

I am running a 45 pilot, 4th clip on needle, 170 main, 1 turn out on the fuel screw.

The plug is showing signs off slightly rich at top end, and slightly lean while 1/4 throttle (its black, with white on top of it, from the slow riding home).

When I was in the trials,, 3/4-WOT was sputtering, sign of running rich, so removing air box lid tamed that and it seemed to run ok, I am sure its slightly rich IMO still.

When I had the fuel screw two turns out, I was smoking a little in 1/4 throttle, so I backed it in to 1 turn. So my plan today is to:

Go 168 main, and 1.5 turns out on the fuel screw (i want to keep my air lid on, btw, so i gotta jet accordingly)

What would you do? [img]i/expressions/face-icon-small-tongue.gif[/img]

 
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