U should get a 87 up box 250 or 500 the 85 timing curve is way dif

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87 lt500r hybrid custom intake with 48 lectron, v2 reeds, scr dune port,4'' over swinger
87 lt250 mild porting, shear pipe,v3 reeds,4''swinger
91 lt250r stocker , fmf
83 RM500 build in progress
85 465rm hybrid dune port, v3 reeds,hand con pipe ,vm 46mm carb 4'' swinger ,in progresss