No exhaust

[Gene563]

Where did it break.? I wouldn't run it (for long) if it was open from the cylinder head, but a missing muffler would be ok for a short time. With a straight pipe, I wouldn't be sure about damage, but it would be loud.
I had an over rich problem that ultimately clogged my stock muffler (catalyst). It gave me running issues after tuning the carb. I pulled the muffler and it ran great. I ended up getting a performance muffler.