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 The PS50k can be recognized by: 
 - engine with underlying camshaft 
 - rear sprocket with 5 mounting holes 
 - rear shock absorbers. 
 Set consists of: 
 - High quality chain. 
 - Front sprocket 15. 
 - Rear sprocket 38 (with 5 mounting holes). 
Tip: Use this locking plate for this front sprocket: 1040080043.