Honda shadow spirit 750 questions!! Help please?

Question

My mufflers are popping really bad. When i switch gear it sounds like a shotgun going off. Is it cause of my compression? Will this hurt my motorcycle? What can I do to fix this problem?

I would rather fix this problem myself. I mean I work at a mech shop but I have never worked on a motorcycle. Anryrways let me knrow. thanks

Answer 1

This really sounds like a fuel mixture problem to me.  Have you changed the exhaust or air cleaner recently?  That is fairly common when you do.

You may need to adjust your fuel-air mixture, or worst-case, re-jet the carbs.

Good luck, and happy riding.

Answer 2

>>  When i switch gear it sounds like a shotgun going off.

That's back fire.  That is usually caused by bad carburation. Kind of tricky to work on without the right tools. Focus on re-jetting your carbs.

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>> Will this hurt my motorcycle?

At the worst case, it can blow open your muffler.

Good luck...

Answer 3

rejet the carbs dude no matter if the exhaust has been changed or not

Answer 4

if you made your exhaust louder in other words kess restrictive it would be a lean condition.However you didnt say if you did that. the only other time I can think of backfiring is if the timing is off. However that bikes ignition timing is elactronic an not adjustable.

Answer 5

Look for hardened or cracked vacuum lines that operate your petcock  or PAIR (fresh air injection valve).

Check that your header bolts are torqued properly.