Grab it NOW.
Track tool in the making
Step one: See if you can store it at PG. Depending on this will determine if you have to make it road legal
Step 2: How shagged is the motor??? Will it last while you sort the runnin gear? ( compression test !)
If it is then budget for a "good " service to make it last ( valves, filters,oil, plugs, fuel filter(s) etc).
Step 3: Is the bugger straight? No point spending money on somethin thats gonna ride like a bent coat hanger!
Step 4: if it's straight ..budget for
a/Swing arm bush
b/ head stock bearings
c/ wheel bearings front and back
d/ gear wheel carrier bearing if any
e/ cush drives
f/ new chain and sprokets
g/ fork revalve/ service ( seals oil etc)
h/ rear schock. rebuild if pos or replacement
i/ new battery
Theres a loadas stuff you can do to save money and if you get through the above i'll get you goin on the other stuff.
While i'm on a roll
a/ stp wingin and get that chip off yer shoulder bout posts
b/ if you post dont expect a reply in 2 millisecs you knob
c/ even with a free bike you're still a cant