Question about 2005 Yamaha WR 450 F

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After a dusty ride carby always has dirt in bowl

WR450 08,after a dusty ride carby always has dirt in the bottom. Some times this has entered the jets and caused erratic or no idle. The air cleaner is always cleaned and oiled, and there is no sign of dust entering here. Any suggestions please

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Go to lowes, look for a caulk line, there you will find a refill for the caulk line dust.

I would lightly spray the blue caulk dust around the intake and carb area, while holding at say 1/8 throttle.

If it is dust getting into the bowl from the air, you should see this in the bowl, and in the air box or tube
you should see trails if it is actually penetrating from
anywhere around the intake area.

I would think its coming from the gas. Maybe there is a defect in the carb allowing a siphon so when the air goes over the port it actually down drafts into the bowl.

Posted on Feb 08, 2010

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