Just a brief first encounter with Two2Cool oil/coolant:

My son and I ride 2009 KTM 300 XC-W's with Rekluse Pro Clutches. We mostly ride the So Cal deserts, including all summer, even when the temps will be in the 100's.

Last year, our 2008 KTM 530's ultimately required fan kits to allow riding in very slow, hot, technical terrain without overheating. We have been using Evans NPG-R in the 530's with temperature indicating labels on the radiators to determine max temps. The Evans will not boil until high 300's, which is too hot for engine components.

The weekend before this one, we rode the new 300's in a very slow (stopped at times to get through obstacles) rocky wash. The ambient temperature was about 70-75F. No problem with boiling the Evans but both 300's got to 250F, at which time we stopped to allow the bikes to cool. We turned around due to the high temps and rode some faster terrain all day.

Yesterday, we rode the exact same slow wash with Two 2 Cool RTL-2 two stroke trans oil and Two 2 Cool Pro-G Coolant (not on the website, you need to call to order) installed in the 300's. The ambient temperature was much hotter, about 90 - 95F.

We got through the same sections with temps remaining below 240F and continued into some even tougher, slower sections that required a lot of clutch slipping and stopping. My bike topped out at 240F and my son's bike never reached 240F.

The Pro-G coolant is also a "no boil" coolant similar to the Evans with additional additives to transfer heat more rapidly. I do not believe that 240F is going to harm engine components and there was no localized boiling that would be indicated by spitting out the overflow.

The bikes were identical to the previous weekend with the exception of the Two 2 Cool products and the ambient temperature was about 20F hotter.

So...it appears that the www.Two2Cool.com products function as advertised.

We are attempting to enable the 300's to be ridden in any conditions without adding fans. So far, it seems this will be possible.

No, I have no connection to Two 2 Cool and I realize that this is a first impression but it seems to be a valid test of their products.

I purchased some of their oil additive to try in the Amsoil that we run in the 530's. The 530's work just fine in the heat but cooler would be better and may allow the fan to run less.

Bob

I run 2 cool oil and race team coolant in my 08 300. I ride slow stuff. Shit I'm slow!!

The stuff absolutely works. I still have my fan and I often forget to turn it on.....

2 Cool is for real.

bobc1 said:

We do not check the forums that much but I would like to say Thanks for the great report.

I don't see how the oil would make much difference on a 2stroke, but it's interesting that the coolant seems to lower the temps. Might be useful for folks that have an issue with overheating (I don't).

llamaface said:

I would think the Rekluse would create some additional heat in the clutch and lower case and thus increase the case heat overall just fanning the flames of the head. Obviously the head is a hotter environment, but keeping the tranny and clutch cooler can't hurt.

Colin

llamaface said:

The overall engine temps on a 2T are close to the overall temps on a 4t. It is commong to have engine oil temps above 300f on either. Our oils will lower overall temps the same in a 2T as they do in a 4T.

The difference we have noticed is that on a 2T lowering the overall engine temps by using our oils doesnt have as much of an effect in lowering coolant temps as it does on a 4T.


We feel and have proven through testing that most cooling systems on offroad motorcycles do the job they were intended for in most situations.

The proof in this for us is the fact that the overall engine temp (measured via the oil) can be 120+ degrees hotter than the coolant temps (meauured in the water jacket).


When you have a high ovgerall engine temp and lowering it by using our oils (or original T2C additive) in a 2t you will see less of a coolant temp drop than you will see in a 4T.


FYI, the best way we have found to lower coolant temps is by using our oils or additives.

Norman

silversurf said:

FYI, yes a rekluse does creat more heat. But, if set up and ridden correctly they dont make much more heat. In a motocross enviroment they dont make much more difference in heat in an engine. In a very tech woods type riding where they make more heat. But in any type of riding the temp reduction by using T2c far outweighs the extra heat cause from a Rekluse.

silversurf said:

Yes combustion temps are a hot enviroment. But to back up our claims that most offroad motorcycle cooling systems are doign their job please read below.


This is a result we have seen an uncountable number of times:

On a KTM250sxf ridden at "A" level on our test track. Our rider will start this bike and ride it for 5 laps (7 minutes) the temps will max out. The engine oil temp measured via a thermocouple in the engine case will be above 340f. The cooling system temps measured via thermocouple in the water jacket at the head will be 220-225f.

Yes the oil temps can easily be 100+ degrees hotter than the cooling system measured at the hottest part of the head. The oil exiting the head measured Via thermister hanging below the cams and not touching any metal part will be as hot or even sometimes hotter than the engine oil in the case. So we have 200 degree combustion temps, 220f coolant temps and oil temps above that in the head above 340f.


back to the cooling system doign tis job>> if we add our engine oils (or T2C) we will lower the overall engine temps approx. 60 degrees in 2 laps. the cooling system temps may only lower a few degrees. Could be as much as 15.


Take the same bike on the same day with the same rider and ride the bike on a 1st/ 2nd gear muddy single track woods track and u can easily have an oil temp above 340f also. With the addition of our oils you will still see the same approx 60 degree drop in engine temps. But, you are more likely to see coolant temps lowered in the 25+ degree range.

Hope this is understandable Sorry for the long post.
\ Norman

I had a great race yesterday but I seriously overheated my RS Beta with the ktm 525 rfs motor . I had some engine ice , a rad fan, a higher temp gas cap and an overflow tank. It was a fun mixed technical slow/med fast race with some nice slippery mud mixed in. My clutch dissapeared (until cooling back down after the race) and my coolant reservoir vent was shooting a 2 foot steam cloud after the 2.5 hr mark . ..so I had to take a couple minute break then ride the last half lap without a clutch. I was going to try some evans earlier but didn't get to it and used what I had. I hadn't heard of engine oil/additive that would lower temps. This sounds interesting to me as I was thinking of dropping $430 on a HT oil cooler. I might still but going this route first and maybe getting the cooler later seems a better step. I am wondering if the 2twocool rad coolant has a similar type of coolant as the evans is.