Chain break 101;
Open vise so pins fit the gap.
Use a box or whatever to support the rest of chain.
2 lb hammer using the flat side, back end of punch to get the pin flat.
Then punch or air hammer/rivet gun with punch MADE to fit said gun.
Enjoy.

Trinity Racing mild porting FMF
62 pilot, EGH needle, 172 main
03 Gen III CR250 frame
2013 Dodger Charger 5.7 Hemi
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350882