Proper Break In for a two stroke

[Fatcat 1]

Hello all,
What is the proper break in procedure for a two stroke engine?
Thanks

[Saleenguy]

Originally Posted by Fatcat 1

Hello all,
What is the proper break in procedure for a two stroke engine?
Thanks

Warm it up for 1 minute at idle, then ride it easy for about 3 minutes, to get it up to temp.
Then ride it like you stole it for 5 to 15 minutes....let cool for an hour or 2.

Repeat the process.....its now broken in.

Use top quality oil at 40:1 mix unless oil injected.

[PallOlavsson]

Then ride it like you stole it for 5 to 15 minutes....let cool for an hour or 2.

Are you kidding?

[Fatcat 1]

Will it hurt to break it in on 32:1 mix? Thats the factory recommendation for proper fuel mix in the manual but I can understand the extra lubrication to!
I am not for sure that the rode it like I stole it [art sounds like a good Idea either! This is my first break in and top end rebuild but that seems like it would be very hard on the new parts that need to be seated properly.
just my .02

[Saleenguy]

Originally Posted by PallOlavsson

Are you kidding?

Not kidding at all.....I rebuild them, and hop them up for a living.

You got a short time window to get a good ring seal....miss it, and the motor will have poor ring seal for the rest of its life.

Just be sure its warmed up before you let it rip is all.

[Saleenguy]

Originally Posted by Fatcat 1

Will it hurt to break it in on 32:1 mix? Thats the factory recommendation for proper fuel mix in the manual but I can understand the extra lubrication to!
I am not for sure that the rode it like I stole it [art sounds like a good Idea either! This is my first break in and top end rebuild but that seems like it would be very hard on the new parts that need to be seated properly.
just my .02

If you really want to use 32:1 then go ahead.

I wouldn't but to each their own.

Are you using a cheapo oil that needs to be mixed rich?

If so maybe give Amsoil a try sometime....its not cheap, but you mix it leaner saving a bt of cost, and the parts stay cleaner, and the lubrication quality is first rate.

I pop a lot of 2 strokes apart for work, and the Amsoil motors generally look better than most.
If you want to use other oils then fine, regualr yamaha 2 stroke oil seems to be good....Blue marble oil is good to.....yes, there are other good oils, but I personally like those three, with Amsoil by far the best.
I avoid castrol 2 stroke like a plague.

[KickassKX125]

Somebody desperately needs to write a guide on how to break in 2 strokes and get it stickied, I haven't been on for a while but there was quite a few last time I was on

[PallOlavsson]

Saleenguy, I dont think I am wiser than you myself on this subject..

but, when you're running something in, it doesn't fit perfectly, since it has just been mounted.. so there's a bigger chance for "seizing" the engine.. and you "seize" the engine with overreving it, making it too hot..

so isin't it dangerous, overheating non run-in parts?

[Saleenguy]

Originally Posted by PallOlavsson

Saleenguy, I dont think I am wiser than you myself on this subject..

but, when you're running something in, it doesn't fit perfectly, since it has just been mounted.. so there's a bigger chance for "seizing" the engine.. and you "seize" the engine with overreving it, making it too hot..

so isin't it dangerous, overheating non run-in parts?

Overheating?

Did i say to toss the rad away, and run it with no cooling system.

I gave my opinion, its been proven by many other folks, and by me personally in hundreds of motors.
Take it or leave it.

But never did I say to overheat the motor, or spin it past its redline.
I said run it hard....and I mean run it hard....really hard.

But I did not say take a motor meant to redline at say 10,000 rpm and ride it around at 14,000 rpm....nor did i say drain the coolant out, or block the rad off with cardboard lets say, to cause overheating.

Go read my post again.

[PallOlavsson]

no, but you did say to RUN IT HARD..

and if a motor is run hard, it's run as hard as possible etc 14000rpm..

and 14000rpm can cause an motor to overheat.. even with the coolingsystem!

[Saleenguy]

Originally Posted by PallOlavsson

no, but you did say to RUN IT HARD..

and if a motor is run hard, it's run as hard as possible etc 14000rpm..

and 14000rpm can cause an motor to overheat.. even with the coolingsystem!

not if its moving at any reasonable speed like say 25MPH or more, and the cooling system is in good shape.
I can bag on my kx 250 full throttle in the desert, making it pull insanely hard in deep sand, on a day that the temps are 120 in the shade, but I and the bike are in the blazing sun....and it does not overheat.
Thats the most extreme conditions I can think of...if it did overheat its got a cooling system problem, or was left sitting with no ram air, and it has no fan to cool it while sitting.

[Fatcat 1]

Calm down gentlemen I just wanted some pointers on proper break in. I didn't want a knowledge P*ssing match. Yes a proper and a General opinion on break should be written up and stickied.

[PallOlavsson]

Sorry if everyone got the thought that, i thought, that saleenguy was wrong..
I was just asking him questions, that I thought were strange in his break in theory..

not mad or anything
And I sure hope I didin't annoy saleenguy either

[Saleenguy]

Originally Posted by PallOlavsson

Sorry if everyone got the thought that, i thought, that saleenguy was wrong..
I was just asking him questions, that I thought were strange in his break in theory..

not mad or anything
And I sure hope I didin't annoy saleenguy either

I do not get mad easily...and this was far from getting me mad.

I know my way works great.....if you disagree, then do not do it.....its that simple.

I have done hundreds of break ins in my life.....and my father was a mechanic and he showed me the right way to do it.
I also have many friends and elatives that wrench for a living, and every single one swears by the same method I use.

But if you would prefer to bay it instead, its your engine, do as you please.

[Fatcat 1]

I didn't think anybody was getting mad I just wanted to stop it before someone did and it became I'm right no....I'm right flame session!!
All the tips and advice I have received from you guys here have been top notch and far better that dealing with the half uneducated counter boys at the local dealer shops they get under my skin REAL fast!!
so thanks to all!!

[chase114]

Many times we rebuild top ends on Friday night and race on Saturday morning. Warm the bike up, take one easy lap in practice and then run the rest of practice hard like a race. Never have had a seizure problem since the kid started racing 5 years ago.

Just how we do it, not saying it's right or wrong, just works for us.