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  1. REV-XP/XS Chassis: Perf. Trail 120-129 Inch Models
    Problem started last year,slight drop off in power in 7000rpm area.This is while opening throttle fairly fast.Now I have it stop gaining rpm at 6800 to 6900 as I am continuing to open throttle from 1/2 to 3/4 no rpm or speed change then suddenly rpms jump 500 or so and you better be hanging...
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