I have an '01 XR50 for sale. It is stock. I replaced the shock/spring, exhaust and handlebars with pieces from an '06 model so they are brand new. Tires are very good. Plastic has wear on it. I'll post some pics when I can.
$800
NEW ADDITION
For an additional $800 ($1600 total, a new 50 is $1300), I will include and install my 108cc, 4spd, manual clutch motor in this '01 chassis. This is an 11HP motor vs. the stock 2.5HP. This motor includes the following:
-108cc stroker with big valve race head
-intake, 24mm carb and foam air filter
-complete bottom end with 4 spd(1 down, 3 up) transmission
-manual clutch set up
-sprockets for the 4 speed transmission (14, 15, 16 & 17)
-jet kit for the carb
-high volume oil pump
-the cases are bored to accept the larger 54mm piston($100 value)
This motor is COMPLETE!
This does not include aftermarket exhaust.