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Hi guys,I picked up a 04 F7 and have a issue. It runs great on the trails. My problem occurs on high speed runs. If I start out dead stop or fairly slowly and hammer on it it goes like a banshee, but if I back off a little and hammer it again it will burble and sputter till climbing out of it. My question is - could the secondary cause this if it's not back-shifting due to soft spring or wrong helix ? It acts like fuel issue but runs too clean at all times for me to accept that. It only does it at say 70-80 mph when I let off and then peg it again? Anybody else experiance this? It has a D&D or Speedwerx helix that shifts out fast.Any idea's ? :wall: