Hi mate you can pic up a speed passion esc n motor new from model sport for 69 pounds or look on here for one but check how low turn the esc can go for motors as you don't want to buying a new esc when you get faster.ive just set a sx3 up for my 8 year old with second hand stuff your best off with a 10.5 turn motor to start n prob won't go any lower than 6.5 .hope that helps
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