anywhere from 55-60 mph
my '03 250SX has been clocked at 82. It has some work done, but 70 easy.
The 250sx has about 47 hp and does 71 mph (stock).
about 50mph
Factory plug is NGK DR8ES-L
Nn BOUT 10MPH I have one and the top speed is 55mph.
Top end should hit 150 mph
90 mph
I Hurd that the 1985 mustang gt top speed was 135mph so the 86 shouldn't be slower
09 250sx has 47 hp
The 250sx has about 47 hp and does 71 mph (stock).
top speed was limited by the engine speed (9K redline = 82.9 MPH)Stock 2009 CMX250 Max speed is labeled at 86 MPH.
ATC 200X, '83-'85 - 58 mph, '86-'87 - 62 mph