KTM 50 SX JUNIOR - Manual (Page 7)

ENGLISH
6
SERIAL NUMBER LOCATIONS
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Chassis number
The chassis number is located on the type plate on the steering head. Enter
this number in the field on page no 1.
Engine number
The engine number is stamped into the right half of the engine case next to
the kickstarter. Enter this number in the relevant field on page 1.