New Motor Break-in

[Coyote]

As many of you know, I have a brand new top end on my GT550. Though I am nowhere near ready to fire it up, I have yet another oil question. Sorry.
I have heard / been told not to use synthetic for breaking in a new motor. Is this true? If so, how many thousands of new bikes used CCI from the get go? CCI is a semi synthetic, at least it is now. Was the formula changed over the years? Maybe in the 70's it had no synthetics in it. I don't know.
Also, I have been told that CCI is no longer available. Is there any truth in that? Not that I particularly want to run it, I like Silkolene myself, I'm just curious about CCI.
So what to use for breaking in? I have nearly a tank full of CCI that I drained out of the bike before tearing it down. Do I dare use it right off? What is the recommended break-in oil?
I will be running fresh non ethanol gasoline.

[tz375]

Coyote,

Synthetics are generally considered to be too "slippery" and do not allow for complete break in, which is essentially final machining. CCI predates synthetic oils though it may have had whatever additives were available back then. Tests on CBR900RR bikes back in the nineties revealed that those run on Synthetic initially made significantly less power than those run initially on dino oil.

I think that modern engines are made to finer tolerances and require less break in that our old clunkers. They are also run on a test bed at the factory and require an oil change from dino to synthetic at their first oil change.

Best to run it on regular old type oil during break in and then pour synthetic Silkolene into the tank and go for it.

But you know what it's like with oils. Everyone has an opinion and they are not all consistent.

[Suzukidave]

I am with Richard with everything i have heard and read about breakin .

[Alan H]

Synthetic oils are much more 'slippery' and don't allow parts like bores/piston rings to bed in very well. I use Millers Super 2 stroke oil SAE40 and it works just fine.
Suzuki's recommendation is for either 'CCI oil or any good quality 2 stroke motor injection oil of around SAE 30' according to the service manual.
In these old engines, I don't think it makes much difference what goes in the oil tank as long as it is reasonable quality and actually gets to the parts it needs to.

[Coyote]

Plain old 30wt motor oil or does it need to be injection specific? A couple of weeks ago I went to the auto store. I wanted straight 30wt to put in my squirt oi can. I didn't see ANY straight 30wt oil. It used to be common as dirt. I wound up buying a quart of 10w 30. Yesterday I bought 2 quarts of 10w 40 to go in the tranny. The recommended 20w 40 does not exist anymore.

[tz375]

I'd suggest using any cheap / basic 2 stroke oil in the tank.

I use either 75/80 Honda or Silkolene transmission oil or Alyson's zero weight oil.

[pearljam724]

I was under the impression that it is not wise to use 30 wt straight oil in the injection system as it is too thick ? If you have a Tractor Supply near you I know for sure that they carry it. I think Walmart does also..

[Coyote]

I'll get some cheap outboard motor oil at Wally World. That should do it.
So I ask again. Is CCI gone? I goggled it and found none for sale by any merchant. Iron Butt Alan sure won't be happy. He put close to 200,000 on his buffalo before it needed some attention. All he ever burned was CCI.

[tz375]

I seem to recall reading a few years ago that CCI was no longer being sold by Suzuki.

The question is do they sell any two strokes anywhere in the world in any application and if so what oil do they recommend? In the case of engines supplied to Arctic Cat, AC sells it's branded oil. In Asia they may still be selling two stroke small bikes and who knows what oil they recommend there.

I see that https://www.rockymountainatvmc.com/p/-/-/775667/" onclick="window.open(this.href);return false; shows it as No Longer Available.