View Poll Results: How are you going to break-in your new Ultra 250x?
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Thread: Ultra 250x Break-in procedure???
02-10-2007, 08:07 PM #1
Ultra 250x Break-in procedure???
BELOW is a link and some highlights from the break-in procedure according to MotoMan.
It is exactly opposite of the factory recommeded breaking procedures.
So...what are your thoughts about
1.) MotoMan "run it hard" break-in?
2.) Kawisaki "run it easy" break-in?
"There are a lot of myths about engines...
easy break-in is one of the biggest "
This is a very controversial topic !!
What's The Best Way To Break-In A New Engine ??
The Short Answer: Run it Hard !Why ??
Nowadays, the piston ring seal is really what the break in process is all about. Contrary to popular belief, piston rings don't seal the combustion pressure by spring tension. Ring tension is necessary only to "scrape" the oil to prevent it from entering the combustion chamber.
If you think about it, the ring exerts maybe 5-10 lbs of spring tension against the cylinder wall ...
How can such a small amount of spring tension seal against thousands of
PSI (Pounds Per Square Inch) of combustion pressure ??
Of course it can't.
How Do Rings Seal Against Tremendous Combustion Pressure ??
From the actual gas pressure itself !! It passes over the top of the ring, and gets behind it to force it outward against the cylinder wall. The problem is that new rings are far from perfect and they must be worn in quite a bit in order to completely seal all the way around the bore. If the gas pressure is strong enough during the engine's first miles of operation (open that throttle !!!), then the entire ring will wear into
the cylinder surface, to seal the combustion pressure as well as possible.
The Problem With "Easy Break In" ...
The honed crosshatch pattern in the cylinder bore acts like a file to allow the rings to wear. The rings quickly wear down the "peaks" of this roughness, regardless of how hard the engine is run.
There's a very small window of opportunity to get the rings to seal really well ... the first 20 miles !!
If the rings aren't forced against the walls soon enough, they'll use up the roughness before they fully seat. Once that happens there is no solution but to re hone the cylinders, install new rings and start over again.
Fortunately, most new sportbike owners can't resist the urge to "open it up" once or twice,
which is why more engines don't have this problem !!
An additional factor that you may not have realized, is that the person at the dealership who set up your bike probably blasted your brand new bike pretty hard on the "test run". So, without realizing it, that adrenaline crazed set - up mechanic actually did you a huge favor !!
02-10-2007, 08:16 PM #2
02-10-2007, 10:25 PM #3
So how hard did you run it?? WOT right away?? How long??
My gut feeling has always been to take it easy on a new machine
and let the parts seat naturally......... This is a radical recommendation!
Opinions from all you gear heads please!! I'm going to be doing one
or the other next Tues!
02-10-2007, 10:44 PM #4
One makes you think his way is the right way??
If he has points that make sense to you, give it a shot.
If you doubt ANYTHING he has to say then maybe try the manufacturers recomendations.
I'd also like to add that damn near every engine builder and manufacturer recommends some sort of break-in. Do you suppose they ALL missed something? Most of them know and understand metals and how they react to one another. They have designed and built these engines for decades and they all seem pretty damn reliable to me.
I would also think they have tried "the other" methods yet keep coming back to the same basic break in.
I've broken all my engines (performance, stock, two and four stroke) in with care, and no internal problems.
Now with all that said, I just broke my last engine in that moto way, so we'll see..........
Last edited by ph2ocraft; 02-10-2007 at 10:48 PM.
02-10-2007, 11:39 PM #5
I did what he recommends with my RXP and honestly it was one of the faster ones.
So I think IMO it works.
02-11-2007, 12:12 AM #6
02-11-2007, 12:14 AM #7
02-11-2007, 12:16 AM #8
Oh your fine man, I think someone here posted his link a long time ago but still I like the poll idea.
02-11-2007, 12:17 AM #9
I didn't exactly do a motoman, and I didn't exactly make it 5 hours.
I DO like the idea of changing the oil immediately, and plan to take it down for it's first service, NOW, not at 10 hours, with the emphasis on the oil change. I'll even pay them to flush the oil.
02-11-2007, 12:30 AM #10
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