2 stroke Flashpoint

[woodsguy]

Never dove into this, how much does it matter?

 

[budzrex]

well Rob to me a higher flash point premix ratio is better for higher rpm running like MX or other areas where you are running at 50% or better throttle openings

For normal single track I generally go with lower flashpoint oils as the lower speeds and combustion temps because of lower rpm will not burn the higher flash
point as easily, now that is somewhat all somewhat less important with todays better ignition and spark over the older points and non electronic ignitions

 

[DFW_Warrior]

I’ve never really thought about it, but that is a crazy large range. I wouldn’t have guessed that.

 

[woodsguy]

I’ve never really thought about it, but that is a crazy large range. I wouldn’t have guessed that.

My mechanic brought it up talking about the smooge on my exhaust. I'm going to try a lower flash point oil. I'm a lugger in the woods. I had never even considered this.

well Rob to me a higher flash point premix ratio is better for higher rpm running like MX or other areas where you are running at 50% or better throttle openings

For normal single track I generally go with lower flashpoint oils as the lower speeds and combustion temps because of lower rpm will not burn the higher flash
point as easily, now that is somewhat all somewhat less important with todays better ignition and spark over the older points and non electronic ignitions

I'm going to give it a go!

 

[DFW_Warrior]

My mechanic brought it up talking about the smooge on my exhaust. I'm going to try a lower flash point oil. I'm a lugger in the woods. I had never even considered this.

I would, but after pulling a stock top end apart at close to 200 hours and having it look like it had less than 20 hours on it, I'm sticking with my Motul 800 until they don't make it anymore.

I will say that on my previous bikes, I didn't have any more or less spooge when I ran Amsoil which according to that chart has a flashpoint of less than half of the Motul 800. Who knows?

 

[james.cain]

I ran the Klotz last time I had a two stroke, 550 Kawasaki jet ski, mostly WOT. The piston tops were a nice golden color when changing the spark plugs.
On my buddies 440 ski the Klotz still did not keep the piston ring from sticking when you got air and could not get off the pipe.

 

[Cagiva 549]

That smooge on your exhaust means things in your motor are well oiled and with no crankcase thats rather important . My smoking days were long ago but a new motor sized up the first time I ran it at high speed for any distance . After a piston and bore I started changing jets until it blubbered a bit at max throttle . Went back down one size and enjoyed the smooge . I also saw 99.9 on my ICO when I punched up max speed after a days ride on many occasions and I never replaced another piston . I did replace rings after a year but that was the only other motor work . And that was a 250 husky smoker that was geared right .

 

[Irishcoffee]

Any version Motul is a great oil. Most brands are these days. In the woods I suggest the 710. The power valves in modern engines suffer from the high flash point oils. It ain't 1975 any more with air cooled bikes. And I would not trust my ICO for use in an enduro if it ever said I had attained 99.9 mph on my 250 Husky. Or my 390, 430 and maybe even the 495.

 

[TNC]

Alright you 2-stroke fiends...how does FI affect the oiling in the smokers? I've had no experience with 2-strokes in decades. I know the early KTM FI bikes had some issues, but it sounds like that was alleviated. FI normally means fueling, but I was curious how it balances lubrication and fueling these days.

 

[woodsguy]

Don't know answer to your question, but I do know my Husqvarna went back to premix on the "competition" models. The enduro models are still oil injection. So at some point might have been a problem.

 

[DFW_Warrior]

Alright you 2-stroke fiends...how does FI affect the oiling in the smokers? I've had no experience with 2-strokes in decades. I know the early KTM FI bikes had some issues, but it sounds like that was alleviated. FI normally means fueling, but I was curious how it balances lubrication and fueling these days.

I can't answer your question because I'm sticking with my 2017 carb'd model for as long as I can.

 

[Ossamar250]

Lower flash point oil is what causes rings sticking in their grooves....petroleum based oils are notorious for this, they also have the lowest flashpoint. The oil film from the cylinder wall will scrape off on the top ring, and burn to a crisp causing coking and stuck rings. 100% synthetic is the way to go, plus it also stays mixed unlike petroleum based oils which settle.

 

[Cagiva 549]

Any version Motul is a great oil. Most brands are these days. In the woods I suggest the 710. The power valves in modern engines suffer from the high flash point oils. It ain't 1975 any more with air cooled bikes. And I would not trust my ICO for use in an enduro if it ever said I had attained 99.9 mph on my 250 Husky. Or my 390, 430 and maybe even the 495.

On open ground I could catch Rick Rulau and pass him on his 430 if I wanted but I didnt bother because I knew he would smoke my *** in the tight stuff , after a race he rode my XC and said holly crap , what have you done to this . It was not as delivered from the dealer .