I have an 06 Fatboy that is running hot and I am not sure what to do. Today for instance, I was in heavy stop & go traffic (for about an hour). . . air temp around 50F, and the bike was running around 255 (digital guage temp). I am not running synethetic, because the HD service manager steered me away from it, but I am having second thoughts.Only mods areV&H staggered and (remapped) and I am runningw/o baffles.

Once the traffic cleared and I got to work, I checked the temp again (225F) . . . so here is my question(s). . . what damage can occur by runnning the bike at this temp?? I know that the Heat Managment System will kick on, but is this too late? Also, will an air cooler be enough? I was told by the service department not to waste my money, and that HD's just run hot! I know that 230 is normal, but in cool CT weather I would guess that my oilwould be cooler!!

Any help would be appreciated!

 

Temp gauges are not that accurate, give relative temps and each one can vary, just something else to worry about, throw it away, put your old dipstick in there, check/change oil regularly and RIDE. Seriously, your temps seem to be normal for the type of ridingyou were experiencing.

 

I had many issues with overheating with my scoot. It was constant. 90-100 degrees stopped traffic stuff. Poor thing would shake like a virgin on the verge. I put in a HD Super Premium oil cooler and Mobil 1 V-twin. The overheating issues are completely gone. So bikes overheat and others don't. Dino oil breaks down at 250 degrees and Syn breaks down at 300 degrees. Syn runs cooler in my scoot by 30-50 degrees. If you are going to keep your bike do it.

 

Check this out.............
https://www.hdforums.com/m_3289724/m...tm.htm#3289724

 

Thanks for the advice and the link . . . I like the setup that Quigley linked me too, and I agree the digital guages are a piece of !@#$. I am going to switch to synthetic at next oil change to see if that helps. Question, if I switch over to synthetic can I go back if I don't like it? I know this is proably stupid question, but I wanted to ask.

Thanks

 

Skip the cooler for now. Just try some Amsoil MCV 20w50 or Mobil1Vtwin 20w50 or Redline 20w50 or Royal Puple 20w50. Then put some 75w90 syn gear lube in your trans (made by any of those) and you should notice enough of a difference.I have always noticed about a 20 degree drop using syn oils.

 

Yes, you can switch back but most people don't.

 

Just my opinion, butthe cost of bikes these days makes anoil coolercheap insurance and cant hurt.
Quigley

 

Motor Oil Breakdown What really Causes It?

First off, all oil breaks down. That generally will include basestocks and additives. Without focusing on performance characteristics, the most significant difference from one oil to another is how quickly breakdown occurs. Although there are many factors that contribute to the breakdown of an oil, heat is one of the most important. Depletion and decreased effectiveness of oil additives is also important, but that will be discussed later.

Petroleum oil begins to break-down almost immediately. A high quality synthetic, on the other hand, can last for many thousands of miles without any significant reduction in performance or protection characteristics. Synthetics designed from the right combination of basestocks and additives can last almost indefinitely with the right filtration system.

As alluded to above, the first major difference between petroleum and synthetic oil is heat tolerance. Flash point is the temperature at which an oil gives off vapors that can be ignited with a flame held over the oil. The lower the flash point the greater tendency for the oil to suffer vaporization loss at high temperatures and to burn off on hot cylinder walls and pistons.

The flash point can be an indicator of the quality of the base stock used. The higher the flash point the better. 400 degrees F is the absolute MINIMUM to prevent possible high consumption.

Today's engines are expected to put out more power from a smaller size and with less oil than engines of the past. Therefore, the engines run much hotter than they used to. That puts an increased burden on the oil.

Even the best petroleum oils will have flash points only as high as 390 and 440 degrees F. Some actually have flashpoints as low as 350 degrees. For today's hot running engines, this is not nearly enough protection. Just about any synthetic you come across will have a flashpoint over 440 degrees. Premium synthetics can have flashpoints over 450 degrees with some even reaching as high as 500 degrees. That's a big difference.

As a result, I think that it's quite obvious that these high- tech oils offer a substantial benefit when it comes to potential breakdown due to burn-off. Nevertheless, even though synthetics are MUCH less prone to burn-off than are petroleum oils, there is still some burn-off during extremely high temperature operation.

Thus, it becomes important to discuss the manner in which petroleum and synthetic oils burn off. As a refined product, petroleum oil molecules are of varying sizes. Thus, as a petroleum oil heats up, the smaller, lighter molecules begin to burn off first.

Since the ash content in many petroleum oils is higher than synthetics, deposits and sludge are left behind to coat the inside of your engine. Detergent and dispersant additives are used to keep these deposits to a minimum, but only so much can be done. Unless you're changing a petroleum oil every 2,000 to 3,000 miles some deposits are going to be left behind.

In addition, as smaller particles burn off, the larger, heavier molecules are all that is left to protect the engine. Unfortunately, these larger particles do not flow nearly as well and tend to blanket the components of your engine which only exacerbates the heat problem.

Synthetic oils, on the other hand, because they are not purified, but rather designed within a lab for lubrication purposes, are comprised of molecules of uniform size and shape. Therefore, even if a synthetic oil does burn a little, the remaining oil has the nearly the same chemical characteristics that it had before the burn off. There are no smaller molecules to burn-off and no heavier molecules to leave behind.

Moreover, many synthetics have very low ash content and little if any impurity. As a result, if oil burn-off does occur, there is little or no ash left behind to leave sludge and deposits on engine surfaces. Obviously, this leads to a cleaner

 

Ok so there you have it.

Syn Oil

Oil cooler

Oil cooler w/fan

Have you seen this?
https://www.hdforums.com/fb.asp?m=2594927