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[CVO2FIXUP]

  I have read some conflicting info about braking in new engines. Primarily about seating in the the rings. One article swears by going hard on the engine right off the bat to seat the rings. They say going hard builds up pressure behind the ring, creating more contact force between the ring and the cylinder there by seating/mating them better? And better compression, and much less blow by. I would love to hear what the experts say on the matter. Cheers and thanx for responding.

[GMR-PERFORMANCE]

Have it done on a dyno.. TONS of info on this as you already know. Rings are 95% + seated in approx 12-15 miles. Performing a CCP test and leak down before start up and then again at say 20 miles will show this to be factual. SO really a middle of the road break in will be fine. The biggest thing that I can stress is that without a proper tune you may hurt the engine. Guys or shops that want to put a half azzd tune on the bike and tell you to bring it back after 1000 miles are crazy in my opinion way more chance for issues that way then if the engine is being watched while tuned in a controlled environment.

many of the dealers that send us the pop up stage III kits do not even hone the cylinders with the new pistons and rings. I have done the leak down and CCP when they drop off and have really had very good luck getting the new rings to seal up without issue. Leak down for that set up will fall into the 5-8% range. For stock cylinders no hone and just installing the new pistons/ ring pack thats really is very good. Hell thats better than a few of the after market cylinder kits that you can buy. 

[JustDennis]

I have always tried to follow S&S instructions.  I used to have a PDF from them but can't find it.  Very similar information can be found here on their website:
http://www.sscycle.com/tech-info/tech-tips/top-end/how-should-i-break-in-my-new-sands-engine/

Always had good luck with this technique.

[CVO2FIXUP]

  Here what I have read a while back, makes allot of scene!! What do you think?



       http://www.mototuneusa.com/break_in_secrets.htm

[GMR-PERFORMANCE]

  Here what I have read a while back, makes allot of scene!! What do you think?



       http://www.mototuneusa.com/break_in_secrets.htm

I think that is too aggressive for most people .. Too many items that are not up to speed.. If the tune is spot on and all of that ok but you get one that is lean and too much timing its all over before the run ends. Better to keep it more moderate and you will have an engine that lives and is happy.

[prodrag1320]

we`ve used the S&S break in method for 25+ years,never a prob.the motousa thing is a garbage way to break in a motor (about the same as the "ride it like ya stole it crap")

[HILLSIDECYCLE.COM]

At least 3 gentle heat cycles with a fan on it, then gentle riding(on the dyno, or on the road) as per age-old S&S instructions is how we like to settle them.
That rip-and-tear method can really load heat into the rings, and not for nothing, wouldn't do that to ANY powerplant for that matter, and NEVER on any engine/oil, broke in or not, that has not been brought to full operating temps, which is usually 5-7 miles, under normal conditions.
Scott

[05Train]

I'm no authority on this whatsoever, however on my tour of the York plant, they put every bike that comes off the line right onto a dyno and run it up to 100mph with little to no warmup.  That says to me that the break-in method is less than crucial. 


Sent from my iPad, probably while I'm pooping.

[JKM]

Ernest, I had Bruce at Dynotunes do my heads this past winter and new stock rings.  They did most of the brake-in on the dyno (about 400 miles/600km).  They set the tune a little rich and told me to ride it to at least 600 miles/1,000km and then they leaned out the tune a little on the dyno.  Runs great.
I think Aviation Cycles uses an outside shop for their dynotuning (Z1 Cycle?)  Maybe Z1 will break it in on the dyno for you?

[CVO2FIXUP]

Ernest, I had Bruce at Dynotunes do my heads this past winter and new stock rings.  They did most of the brake-in on the dyno (about 400 miles/600km).  They set the tune a little rich and told me to ride it to at least 600 miles/1,000km and then they leaned out the tune a little on the dyno.  Runs great.
I think Aviation Cycles uses an outside shop for their dynotuning (Z1 Cycle?)  Maybe Z1 will break it in on the dyno for you?

  Hey there JKM thanx for the post. I used Z1 Cycle for ma last tune and have some issues with low end shuddering. I will try Bruce this time around. A friend of mine just built his 110 with exactly the same speck as what I am doing. Bruce set up the tuning.  So Raph @ aviation will load that map in to my bike for brake in then I will tune with Bruce. Just waiting for the pistons, so I can ship out the lot to J-Presicion. Cheers.

[JKM]

Ernest, give Bruce a call or stop by his shop in Burlington.  Might be best to have him give you a rich tune for the break-in and then do a re-tune after break-in.  Canned map is not always best.  Considering the money you're spending it might be worth it to ensure the break-in goes well.

Jason