If i was in your position which i am with my R by the way lol...just to guide you or maybe detter you from some parts ill tell you what we are doing with our 86' R
P'coated and gusseted stock frame
Stock p'coated swinger
RPM +4 Axle
Houser +2 a-arms
PEP front shocks and pep rear shock
Either a nice pv motor or a crf motor
Beadlocks out back with 20 inch razrs
.190's out front with razrs
i already have a lonestar carrier bearing but its a good idea
Houser +1 steering stem
AC nerfs (i already have em)
a good comfortable set of bars (i put renthals on my quads but its personal choice)
Either oem or other aftermarket plastics
AC bumper
And a nice motor to go with it right now i have
Stock 86' top end bored .20 over with a wiseco high compression piston
Ported and Polished for MX
Wiseco hot rod
Hinson clutch
pro design cool head
rebuilt everything
Wiseco crank
a good airfilter (i like k and n)
A good pipe (i have a fmf fatty/powercore II silencer)
FMF reeds and reed cage
A setup like this should be great for a start into racing...later you may want a frame and swinger but its a start...and you may think my motor mods arent much but let me tell you IT RIPS.....
04' 450r-everything,63hp>stock bore/stroke
94' RX7 R1- built 5.3l lsx, 76mm turbo, built t56, Ronin widebody etc- project
63' F250 4x4- 6bt I/C Cummins motor, Ford ZF5 trans, Kingpin Dana 60 front, 87' F350 frame, 6 inch lift, 37's, 63' F250 body- toy hauler