Scarabus.
SCB-9T - The 9T variant of the Scarabus is built using Triple Strength Myomer to enhance the 'Mechs speed and strength when the 'Mech is operating in the proper heat range. This enhances the 'Mechs top speed giving it a maximum speed of 183.6 kph and also increases the sheer amount of damage that the Scarabus is capable of doing with its Hatchet. Otherwise, the 'Mech has not had any significant changes made. BV (1.0) = 749
Otherwise grab an Ostol - 8M and pick up a tree.
OTL-8M - The 8M Ostsol is built using the same Endo Steel chassis as the 7M and a larger extralight engine boosting the 'Mech's speed to 97.2 kph. The 'Mech is similar, though, to the intended design philosophy of the original 'Mech. The 8M uses Triple Strength Myomer to boost its top speed to 118.8 kph and carries a PPC as its primary weapon. This is supported by a Large Pulse Laser, three Medium Pulse Lasers, an ER Small Laser, and an ER Medium Laser. BV (1.0) = 1,196, BV (2.0) = 1,661