6,25g, which gives accellerating rpm at 7200 with the standart spring
I get nowhere near 7200rpm with any weight rollers over 5.5g's, think it sits around 6100-6600 if im lucky on 6g's and thats with a stiffer torque spring, unless its downhill
All depends on your terrain i guess
As for losing take off speed....thats prob down to the Malossi boss being a little shorter for more top end, its 0.5mm shorter than stock i think. Lighter rollers help, my boss is now 1.2mm shorter and 5.1g's or 5.3g's work well with that. Gives me best of both worlds, good acceleration AND still gets 44-46mph on flats, 50-52mph downhill.