I have a 2010 screaming Eagle Ultra with the 110 engine. I was always under the impression that these engines came stock with the automatic compression release. I began looking at a parts catalog and exploded view of the engine and I don't seem to see any parts that would relate to a compression release. So do I or do I not have compression release on my bike

 

I would say you do and the reason you cant hear them is the air is run through the exhaust when you start the engine. My bike is a 96 upgraded to a 103 using my 96 heads with the compression release added on and they vent outside the engine so you hear them.

 

Yes as do the factory 103's also

 

Yes sir.

 

You got them.

 

What year did they start with the 103's?

 

I just had a 255 cam put in my 103 Ultra. I asked about the compression releases. They told me they were installed at the factory but when the put the cam in they used the tuner to enable them or something like that.

 

If you are talking about compression releases, 2011 and newer touring bikes but I have heard only on the ultra's. Doesn't make sense though so hopefully someone with a street glide or RGC can chime in.