661 Oil Test 32:1 vs 40:1 vs 50:1 ?

[CR500]

Its been out for 10 years or so. It was originally developed for Kart racing. As the "K" stands for kart.
Two strokes are definantly in a minority now.

Sadly learning about 2 strokes is a lost art lol, I still like learning about them and maybe one day the knowledge will pay off.

 

[bwalker]

"Lean" (or "rich") applies to the air/fuel ratio, not the gasoline/oil ratio.
"Lean" means too much air for the amount of fuel (or not enough fuel for the amount of air).
In other words... you could be drowning the engine with oil, but it could still be running "lean".
*

You will seize them at 16:1 if the air/ fuel ratio is lean. The seized motors I have torn down always had oil in the lower end.

 

[Ron660]

I know you like 800 2t but have you ever run K2 Ron?

Never have tried it.

 

[nitehawk55]

You haven't torn down many seized motors I take it.

Yes I have and I have a good understanding of how 2 cycle engines work and what doesn't .
You carry on with your valuable knowledge on here , I'll just sit back and listen .

 

[bwalker]

Yes I have and I have a good understanding of how 2 cycle engines work and what doesn't .

Not as good as you think, if you believe lean seized motors don't have oil coating the bottom end.

 

[nitehawk55]

Not as good as you think, if you believe lean seized motors don't have oil coating the bottom end.

I'm not just talking the bottom end , that piston is wet with oil unless it was put on it afterward .

 

[Trx250r180]

I'm not just talking the bottom end , that piston is wet with oil unless it was put on it afterward .

See post 4333

 

[Moparmyway]

I prefer K2 thus far, especially in a saw..

Can you go into detail as to why you preferr K2 ?
Are you seeing something, hearing it run differently, tuning better, etc ...... ?

 

[bwalker]

Are you asking why I'm refer K2 to 800 or why I like K2 in general.

 

[Flatie]

Are you asking why I'm refer K2 to 800 or why I like K2 in general.

All of the above
For me its between these two. 40:1 with 800 or 32:1 with K2... Tough decision.

 

[Moparmyway]

Are you asking why I'm refer K2 to 800 or why I like K2 in general.

I am with flatie on this .......all of the above............. please go into details and answer both questions you posed

 

[mdavlee]

K2 works. I've used a couple quarts of it.

 

[KenJax Tree]

I would use K2 100% of the time if it was more cost effective for me.

 

[Whitespider]

I'm not just talking the bottom end , that piston is wet with oil unless it was put on it afterward.

nitehawk,
The terms "lean" and "rich" have nothing to do with oil, or the amount of it.
*

 

[KenJax Tree]

nitehawk,
The terms "lean" and "rich" have nothing to do with oil, or the amount of it.
*

Air/fuel mixture is where its at[emoji6]

 

[Ron660]

K2 works. I've used a couple quarts of it.

Did you get a chance to look at the lower end for lubrication compared to R50 or 800? I saw that K2 has a viscosity of 13.5 at 100C.

 

[Trx250r180]

Has anyone noticed any performace difference between the brands ? Better throttle response ?

 

[KenJax Tree]

Has anyone noticed any performace difference between the brands ? Better throttle response ?

Not in reality[emoji1]

 

[bwalker]

I am with flatie on this .......all of the above............. please go into details and answer both questions you posed

As I have said I can't go into detail for certain until I get a bunch more run time on it.
Based on what I have seen thus far with tuning, how clean it burns, lack of smell I think it's a pretty decent oil. Although as I mentioned above its really too early to tell much till full internal tear down are done.

 

[bwalker]

I would use K2 100% of the time if it was more cost effective for me.

I suspect what it's going to come dome to for me is the question of if K2 is worth almost double the price and the hassle of mail ordering vs Yam 2R which I can buy local. The only other high end oil available local is Motul 800 and I really don't have any interest in running it.