98 GTX not reaching top speed

[tabski1]

Last year my 98 GTX would reach 60 - 62 MPH. First time out this year it only averages about 48 MPH. Cleaned the fuel on and off valve which had some dirt in it and was making it stall until I cleaned it. It no longer stalls , just won't go above 48 MPH. I have winterized it myself for the last three years, First time I am having this problem. Where can I start to troubleshoot?

Thanks

[Technical Support]

Re: 98 GTX not reaching top speed

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