im having some trouble on my 2006 dyna street bob it sounds like its running on one cylinder ive changed my spark plug and spark plug cables and air filter it backfires when i start it and after i turn the bike off it smells like gas im out of ideas and would appreciate any help i can get

 

Ground one plug wire at a time to isolate which cylinder it is. If it's the front, take a VERY close look at the injector wires near the connector. They can break inside the insulation and the only thing you'll see or feel is a slight narrowing of the wires.

 

What did your plugs look like? Were they pretty much the same?
Do you have a tuner?
You'd be surprised how many of these odd problems are caused by loose or dirty battery and ground cables, so check them. And stop buying parts until you diagnose the issue.

 

I’ve check every thing you’ve told me to check but it seems like my rear cylinder has less compression the the front cylinder and my rear spark plug is fine but my front spark plug comes out wet and black

 

Sounds like it's time for a compression test...

 

If the rear cylinder fails a compression test could it be a stuck valve or piston rings bad? Or does it depend on how bad the compression is?

 

You didn't say if you are getting spark from both plugs.

I don't know how you determined that the rear cylinder has less compression, but the fact you have a fouled front plug would point to that one as being the problem.
Test for compression and then worry about the cause.
How many miles on the bike?

I'll ask again- do you have a tuner installed?

 

I don’t have a tuner and I️ am getting a spark because the bike will start
my bike has about 27,000 and I️ placed my finger on the spark plug hole and I️ felt a lot less in the rear cylinder

 

Think you need a Factory Service Manual and perform a compression test accordingly... You can rent a tester from any Auto zone...