Rocket bore/stroke,vs. HD bore stroke

[bruce aussie]

Your right about one thing. All the other bikes out there with loud deep sounds don't come close to the sweet sound of the Milwaukee machine.

You haven't heard a Rocket with a C.E.S. 3 into 1 exhaust system?

 

[bruce aussie]

It's a strange thing that Harley running straight pipes noise. Used to like it when I was making it, but now I find it very annoying.

 

[Rocket Scientist]

I never really looked into the firing order on an R3. Do they fire one after another 1,2,3 then on the next stroke they all exhaust ?

 

[ROCKETHEAD]

I never really looked into the firing order on an R3. Do they fire one after another 1,2,3 then on the next stroke they all exhaust ?

Yep 123 suck 123 squeeze 123 bang 123 blow...

But if 1 is sucking then 2 was blowing and 3 was banging...

Big ol orgy going on all at once...

 

[Jarrod83]

There are so many things that affect the exhaust sounds. Number of valves, valve arrangement, ignition timing, head design, compression and A/F ratios, length and diameter of the exhaust pipes and design of the mufflers are just a few factors. Me, I don't mind the way Harleys sound; I just wish there was movement associated with it. I will also have to say I don't care for the r3 at idle, but 2-5k cranking through the gears sounds freaking incredible.

 

[Molinoman]

Had a lot of bikes on the road today, I particularly noticed that the loudest ones usually were of the HD brand. The first thing came to my mind watching them leave a stoplight or a stop sign was...so much noise...so little power and acceleration. Some of them have a decent sound (mine did as well) but it was almost painful watching them slow move up to speed considering the exhaust note coming out of those pipes.

 

[1olbull]

The sound is chiefly from the single pin crank.
Some Jap motors did this to copy the sound - ie my Kaw VN2000 V2K.
As I 'member the old Honda Ace back in the 80s was the first to do this.

 

[TOMCAT]

Joe Taverner is Brissy built the nicest FXR based Harley I've ever seen. Grafted HD Street-Rod front and ass end onto stock FXR frame. Had a 131 Jims engine , Baker 6 speed and LSR 2 into 1 exhaust system .. sounded like a NasCar coming down through West End the night I spotted it. Awesome Harley

 

[CanberraR3]

Nothing seems to p#ss people off quite like an obnoxiously loud Harley. Give me the sound of a triple any day.

 

[Malcy]

Since I had the crossover pipe made larger to suit the CES headers the note is way deeper than before (and a bit louder), I like it. Not sure it will please the authorities though.