an R should stay as a MX bike if you wanna drag bike build a banshee like im doing. you cant beat the hp the shee's make. :d
Oh it wouldnt be a drag quad itd just be a really fast mx quad. Im not a fan of the banshee or yamaha. definitely wanna build a drag quad with the a turbo zx14 motor or a turbo hayabusa motor in it though :d not sure what frame i would use though