Beach RC says... The Yokomo YZ-4 SF2 Factory 1/10 Electric 4WD Buggy Kit is an evolved version of the YZ-4SF platform, with refined features that give this World Champion platform an edge over the competition. The bulkhead, motor mount, slipper clutch, and more have been significantly lightened for improved performance. Updated suspension arms are stiffer, providing improved rigidity, while 3.5mm inner hinge pins have been added to help increase durability. The Ackerman ratio has been updated to deliver improved steering characteristics, and a smaller center slipper provides faster throttle response for quick acceleration. Also, the camber links are now attached to the shock tower, helping to achieve both weight reduction and a lower center of gravity.