Author: CSC Motorcycles via YouTube
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Chain Adjustment and 16 Tooth Front Sprocket Installation.
16 tooth front sprocket https://cscmotorcycles.com/sprocket-front-drive-16-tooth-tt250-sg250/
428 x 120 link chain https://cscmotorcycles.com/428nz-x-120-links-b-b-for-sg250/