There seems to be a huge amount of confusion about this issue! Read this: <a href="http://www.belray.com/scripts/futurearts.dll?CollectBinaryData?loc=belray&coid=5 5180&moid=20156&fauuid=f79475d3-d107-4f23-bdbf-ca9069443184">

http://www.belray.com/scripts/futurearts.dll?CollectBinaryData?loc=belray&coid=5 5180&moid=20156&fauuid=f79475d3-d107-4f23-bdbf-ca9069443184</A>

If you have one to the modern 450's with a little skirtless piston, no matter whether it is a Honda, Yamaha, Suzuki, or Kawi...you will be getting a lot of blow by. This means that your oil will be rapidly getting diluted by fuel contamination. It isn't an issue of your oil "wearing out" that quickly, but rather it is getting thinned out from the gas that gets dumped into it.

These aren't our father's engines! They weren't even our engines five years ago!!! It's a new generation of engine, and we all need to stop thinking like the old days.....

Change your oil frequently, and use a good quality API SG/JASO MA motorcycle oil.

 

So wut oil do you all recommend to run in the 450's?

 

My personal choice is Maxima Extra, a 100% ester based synthetic. http://www.maximausa.com/products/4s...synthextra.asp

Some good basic oil info: http://www.thumperfaq.com/oil.htm

If you pick a motorcycle oil that is API SG/JASO MA, you can't go far wrong....it's that simple!

Beyond that, the synthetics are superior to plain old petroleum oil, and of the three different types of synthetics the ester synthetics are the best. The downside for some folks is that the esters are the most expensive. For me, I have lots of $$$ invested in my machines, so I want the best protection that I can find and I am willing to pay for it....that's simple too!

Some good info on the different synthetics: http://www.maximausa.com/technical/l...beNews2002.pdf

 

Why do some people use synthetic oil in their stuff because my brother has a 2004 CRF250X and he never puts synthetic oil in his dirt Bike. He says it dosent work proper

 

Do a search of the net, and you will find tons and tons of stuff explaining the superior properties of synthetics! In my mind, a screaming little 250 absolutely needs a synthetic!

Keep in mid that there are three types of synthetics. Rotella is an example of a group III synthetic, Mobil 1 and Amsoil are group IV PAO's, and then there are the group V esters. Maxima, Motul, Klotz, and Redline all have some ester synthetic motorcycle oils, and I would feel comfortable running any of them.

 

Thanks for the input reconranger.I have just one more question for you,Wut is ester that you was talking about.

 

interesting article, although it does lead into a 'buy our oil' ad...

id just like to point out, though, that on our 450Rs (04/05 models) it DOES have a 3rd ring on the piston (the article states that pretty much all 450s dont) and it does has somewhat of a longer 'skirt' over the CRF at 22mm... honda purposely did this to keep up reliability...and it kinda pissed off the CRF riders that tried it and found out they reworked the engine internally.... however the newer 450rs pretty much have the CRF450X engine.

but hey oil is cheap insurance. i use the approved honda stuff and my oil is always fine, the bike runs great... over 3yrs and counting no problems whatsoever.

 

http://chemistry.about.com/library/g...blcoogroup.htm<a href="http://www.hatcocorporation.com/cgi-bin/helpdesk/faq.pl?category=c19dt">

</A>Click on "The Science of Synthetic Oil". Be sure your sound is turned up: http://www.redlineoil.com/

http://www.hatcocorporation.com/cgi-...category=c19dt

If you hang ester groups on lubricating molecules, it gives them special properties that other lubricants don't have. One of the best is that it gives the molecule a charge (polarity) and that makes them stick to metal surfaces, kind of like a magnet sticks to your refrigerator. So even when your engine is off, you still have a coating of oil on the metal surfaces. That's real nice to have when you restart your cold engine!

They also have lots of other properties that make them superior to other lubricants. The references above may mention a few of them.......

 

the suzuki dealership told me to use there suzuki synthetic oil or it would void my engine warranty i guess thats the aa what ever thing approved isn't it??? and i change it every 6 weeks cuz i don't race track or anything i drag race on sundays but the rest of the time i juss trail ride and i don't put the hours in in the 6weeks that the recomend to change it i juss figured that would be a good basis to keep track of