I have 7000 miles on my Street Bob I purchased Feb 26, 2010. I have done all the maintenance on the bike per the 2010 Dyna Service Manual. I am really thinking of putting in some 204s because I like the lope, and I think they would compliment my riding style.
A fellow biker here at work mentioned to me that my bike is broke in, and adding a performance part now might shorten the length of the motor. i.e. Don't open a motor if it is in good working order. I understand his thoughts, and I would have the stealer/dealer do the work because I have a pretty good relation, and they have been straight with me since I took my down payment back after some BS they tried to pull. Another story.

My question is @ 7000 miles on a new bike would adding the cams stress anything that might have been broke in. Example. Hair line cracks, the way the engine twists while accelerating and decel, etc.
I know that adding this performance part will make the engine vibrate different and all. I also wish I had done this at purchase, but I didn't think about it then. I am just concerned about opening up a motor that for now seems to have been flawless.

Thanks for your opinions.

 

You are thinking way too much.Now is a fine time for cams and your motor will be just fine with 204's.You won't however get as good a lope with your injected bike as the older bikes get.Just my opinion.

 

As a Street Bob owner, I am interested in this topic. Posting to keep it at the top of my list. Editbrain, I am curious, what is your riding style? Aggressive?

 

well I wouldnt worry, I am putting andrews 54h in monday! my bike has 8600. I would do it and not look back. the 204 is a good cam it was between those and my 54h. I went with 54h because bean said they were the best with his heads.

 

My riding style is mainly street, and fairly aggressive. No, lugging. No, putt'n. Interstate is 75-80 mph.
I like the torque range to stay low-mid. I am thinking 204s because of warranty. I would like to do this before the warranty is up in case it fails. I do not have head work. This is the other reason for the 204s. I figure a modest 5-8 pound of torque moving the range back to the lower end, and a 3-5 bump in HP. Just guessing here. Nothing really to back it up.
There is just something to be said with fixing something that isn't broken. I have had projects like this go south really quick, and what turned out to be a 1 day job may turn out to be a month, but like I said the dealer will do it for a pretty good chunk of money.

 

I'm not sure what correlation mileage has to doing performance upgrades.

I'd sure like to hear your co-worker's rationale.

Oh, and if you think adding Screamin Eagle (harley parts) won't void your warranty if they can determine a problem was caused by the part you're adding you're kidding yourself.

Back when I was researching install cost, my local dealer told me that adding SE cams would void my warranty if a problem ocurred and it could br traced back to the cams. I argued with him that they are harley parts and how could a harley part void a harley warranty. He said "I know, but that's how they are about it.".

So, if you're worried about having warranty issues, just wait till it's done.

 

your buddy has no idea what he is talking about! i tore my motor down and did it with 28k on it. he has no idea what he is talking about at all.
204's sound like a good cam i personlly like my 37's the most, they rip off the line, cruise no problem, did loose a bit of gas milage but i could care less about that, and have a wicked sound at idol

 

I think his thinking is if it isn't broke don't fix it. Like why open a motor that is in perfect working condition. I understand what he is saying, and it is something to think about.
I still get where I am going, and can be out in front of vehicles easy from a light. The bike is quick. Quicker than any bike I have ridden or owned.

I like the idea of having the cams. I don't plan on head work though. I have a Stage 1 with a Thunderheader, and it is a nice sounding setup.
I almost feel geezer to think that a Corbin Solo with a backrest and a set of HW pegs for those long trips NW would be a better use of the money.

And his reasoning on mileage is that the parts have tweaked themselves to rest, and maybe the metal has had some stress cracks and such. I am sure it happens. I would use the term cured, but... I am not a motorcycle mechanic, and he comes from a long line of diesel mechanics. He is pretty good with motors. I just wanted to post up here for some other opinions.

 

Checkout the Cycle Rama 575, it's a high lift dropin with a 35* intake valve close. A 30T pulley will do wonders without breaking into the engine, just the primary.

 

The 204's are going to be more than a modest bump if your exhaust doesn't hold you back. My motor is pushing 100ft/lbs and 90hp with the 204's.