help - break-in tips

[frozentime]

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 !!

Warm the engine up completely:
Because of the wind resistance, you don't need to use higher gears like you would on a dyno machine. The main thing is to load the engine by opening the throttle hard in 2nd, 3rd and 4th gear.

Realistically, you won't be able to do full throttle runs even in 2nd gear on most bikes without exceeding 65 mph / 104 kph. The best method is to alternate between short bursts of hard acceleration and deceleration. You don't have to go over 65 mph / 104 kph to properly load the rings. Also, make sure that you're not being followed by another bike or car when you decelerate, most drivers won't expect that you'll suddenly slow down, and we don't want
anyone to get hit from behind !!

The biggest problem with breaking your engine in on the street (besides police) is if you ride the bike on the freeway (too little throttle = not enough pressure on the rings) or if you get stuck in slow city traffic. For the first 200 miles or so, get out into the country where you can vary the speed more
and run it through the gears !

Be Safe On The Street !
Watch your speed ! When you're not used to the handling of a new vehicle, you should accelerate only on the straightaways, then slow down extra early for the turns. Remember that both hard acceleration and hard engine braking (deceleration) are equally important during the break in process.

[ManoyanX]

mga istoryans, mag palit unta ko bago mot2x, first ni nako, unsa mn jud ang maau nga break in? kanang hinay or hard break?

kung hinay, unsaon mn pud? ang hard break? salamat mga pips, newbie here. hehehe.

[ruji119]

hinay < basaha ang manual
hard break < awkie ra padagan ka 90 to 120 depende sa engine displacement

[jarlz]

CLOSED THREAD!!
wala nlng nko gi breakin kay ako nlng gi patimbang akong mot2!!

[ManoyanX]

unsa mn pd mas maayo ana brad?

[jarlz]

unsa mn pd mas maayo ana brad?

bago man kaha na nga mot2!!
so hard break-in..
depende rana nmo kung gentle lng pagka breakin or hard!!
read manual jud important..
kani akong thread dri about mani sa new rebore!!

[jonovanz]

jonovanz mao mana ang tuyo sa ingon ani nga forum aron naay contrast of advise, wala diay ka kahibaw ana? mao nga naa jud nay 2 sides ang kapili-an sa nangita ug advice. majority wins ba kung gi poll mani niya..

lastly, sa akong nang giingon there is no absolute do's and don'ts with regards to rebore break in method. ug maka guba para nimo, maka ayo pod sa uban. and of course it's not totally same hard break in as brandnew engine in case you misunderstood my point.

aw naa ra mn diay na! e state diha kung unsa jud imong gusto..! halata mn kau ka sa imong tumong ug tuyo diri.. ang mgpa tagad lang..! act as an CIA bai..dili ky pa goryo-goryo ra imong hibal.an!

[ManoyanX]

bago man kaha na nga mot2!!
so hard break-in..
depende rana nmo kung gentle lng pagka breakin or hard!!
read manual jud important..
kani akong thread dri about mani sa new rebore!!

sori brad ha, wa man gud ko kabantay sa title sa thread nga para sa new rebore ra diay ni.

[necrotic freak]

aw naa ra mn diay na! e state diha kung unsa jud imong gusto..! halata mn kau ka sa imong tumong ug tuyo diri.. ang mgpa tagad lang..! act as an CIA bai..dili ky pa goryo-goryo ra imong hibal.an!

di naman ko kinahanglan magpatagad jonovanz. dili man ni about as a CIA bai.. ambot ug ikaw nakahibaw baka nga tanan naay katungod mo hatag sa iyang opinion diri sa forum?

decision nana sa TS lagi kung unsa iyang tumanon. pero gipatimbang naman lang diay niya.

[SuperStar]

naunsa na man ni diri? make love not war