What's the best way to break in a 4 stroke?

[SWIGIN]

I have rebuilt EVERY engine of all the stuff in our yard at least once, and I have tried every break in method, babying it, heat cycles, giving it hell, and when its torn back down again either years later or to replace a part, theres never any difference in compression, piston, cylinder, or ring wear, blow by, or what have you, it just doesnt make a difference.

Id say give it hell, thats the only time the engines never gonna be BRAND NEW again, so might as well get the most out of it from the start!!

-Nick

well said


just to add something.....never let a new motor sit and just idle....thats the worse thing you could do to it

[SWIGIN]

heat cylcles are good and dont beat on it till 2-3 tanks of gas are through it imo...
i hate people that say to beat em right away its the dumbest thing you can do.

a few heat cycles at first are a good idea but you shouldnt baby the thing around ether....lugging a new motor is bad

i just ride them, not beating the crap out of them but not putting around ether.
after a day or 2 of that let it rip

[edog]

Can't wait!!!!!!
I am going to ride it like it's stolen.

[TrailerRider]

So all those procedures are for *new motors. What if you just put in a new piston/rings and had cylinder bored over 1 size from stock? All seals would be hard as they are going to get besiudes obvious topend gaskets. Sorry to dredge up an old post but the 200s is done and going for her first ride in 3 or 4 months. I don't want to tear motor apart again in a few weeks.

[honda_atc200es]

aha, im am in exact situation as trailerrider =], also doing a plug chop on a semi auto, can i just hold the shifter up as i kill the engine? or will that do damage?