Garth, you may have gotten lucky with the broken stud blowing out the exhaust with only minimal damage to the engine. If so, the stud will wind up inside your muffler. If it did, during idle when engine noise is minimal and engine shake is max, you may hear an annoying little jingle from one muffler.... The only way such a noise can be eliminated is to cut open the muffler body and dig around until you find it.
Too late this time, but making up a gr-5 stainless steel stud will fix things for next time. Stainless is tougher than mild steel and will not work-harden from vibration. Lock-tite along with a locknut keeps the threaded bottom secure in the carb boss.
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