Amounst 3 other sleds,I raced my "Improved Sock" 99 SX700 from 1999 to 2007[Bender Tripples,Ported ,Boost Bottle, VForce Reeds,Light,Weight Parts, Gutted Airbox,transfer rods,Introvert drivers,lower gears,thunder shift clutch weights,1 1/14" track,strapped suspension ,40 years + of continuous racing,+ set up experience ect...]I raced against the F7's that ran in "stock" then moved up to"Improved Stock". I was never beat by any F7, but also was never beat by any 700 SRX in 660' or 1000'. The trouble with our Yamahas is the difficulty of "Hiding" any mods on the sled. I have raced Yamaha's for a very long time...its an uphill battle in stock, thats why I moved into Improved stock so I could unleash the potential these "Superior" sleds offer!!!
As we all know"Stock" is a relative term!!! JMO