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pman1

1/4 throttle blues

10 posts in this topic

Does any one have problem with 03 wr 450 at 1/4 throttle? Mine runs very rough. tried moving clip up and down. Each way makes it worse. Changed pilot jet each way. Each way is worse. Also I never recieved anything about a recall from my dealer. Does it only affect sertain serial no.s or is my dealer letting me down. Please Help!!!!!!!!!!!!

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I had a problem with mine surging at 1/4 throttle. I got a YZ450 needle for my carb and it fixed it right up.

Jimbo

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I know that on the 426, that area of the throttle was controlled by the pilot circuit....is this different on the 450's?

Race

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If you havent tried the James Dean needle kit that is what I would suggest, overall this made the most improvement in low end response on my bike.

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I tried the YZ needle because it is a richer needle than the WR. Mine surged a lot at about 1/4-1/3 throttle. I took it up to the mountains (about 7000 ft) and the problem went away. I then knew I had to richen up. Worked for me and it was only about $10 and 15 minutes to install.

Jimbo

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I have the same problem with the WR450 is there a dead spot when you crack the thottle quickly also

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