Scott's stainless steel oil filter for WR450
Posted March 26, 2003 - 10:34 PM
I'm planning to keep this new bike a long time.
I use synthetic motor oils in my road bikes and my WRX with good success. I just wanted to know about using them in this motor. Is it recommended or discouraged?
Posted March 27, 2003 - 06:05 AM
Posted March 27, 2003 - 03:46 PM
Posted March 27, 2003 - 03:48 PM
Sorry to reply after my reply.
Posted March 27, 2003 - 04:56 PM
I use to clean mine in kerosene and then blow dry. Now, I just clean them with dish soap and water. I use an old hair dryer to dry them off. Takes only a couple of minutes. IMHO, I think they are a good investment. Especially, if you plan on keeping your bike for some time and change oil often. As far as advertised micron sizes take it with a grain of salt. The only thing that sort of substatiates it with the stainless filters is that we can know what type of metal cloth they use and its filtration and flow ratings/properties. I have found through my research that the advertised micron filtration size and flow characterics is consistant for the type of weave of cloth they use. By doing an internet search on "stainless steel cloth" you can find a ton of supporting data.
Good luck, Paul
Posted March 30, 2003 - 11:27 AM
Second, Yamaha changed the filter for the 450's to paper due to the smaller oil capacity of the system and likely have an engineering reason that drove this change from the 400-426 models.
Third, and most important, NASCAR teams use both a screen type filter AND a paper filter. Considering that these folks have $ 50,000 plus engines, I'd think they have filtration of the oil well thought out.
If one looks closely at the stock 450 Yamaha system, the stainless filter is up in the frame, and the paper is on the engine. Does Yamaha know something the aftermarket folks don't?
Posted March 30, 2003 - 02:46 PM
I wouldn't put too much into manufacturers switching from metal to paper. There is a lot of money to be had by selling paper filters and it gets the customer back to the dealer on a regular basis to buy other things too.
Posted March 30, 2003 - 05:07 PM
Posted March 31, 2003 - 09:24 AM
There are a lot of people using them in a variety of different bikes and there has never been a reported problem with their use or, as a result of their use. But, if there ever is, I'm sure we'll hear about it here!
Posted March 31, 2003 - 04:37 PM
You might be missing my point here. Up until this model year, Yamaha had used a brass screen filter on its YZ and WR models. These filters are washable and cleanable and last a long time. Why one would replace these with a $ 70.00 filter is beyond me, as they accomplish the same thing.
If Yamaha had determined that a 35-micron filter was good for the overall durability of the machine, likely they would have designed a filter to meet this requirement.
The new bikes filter was designed, according to my sources within Yamaha, to provide better filtering capability for these machines that now have less of an oil capacity. So, in a sense, Yamaha has engineered the best of both worlds for these machines; a stainless mesh in the frame to trap the big stuff and a paper filter for the final cleaning.
As for problems with aftermarket filters, I can tell you from experience as a dealer that we have seen some YZ/WR four stroke engines damaged from oil starvation; all of which had aftermarket filters of various makes. We have never seen engines damaged from oil starvation when the customer uses the OEM filter.
I spent considerable time talking with Ty Davis’s former mechanic about this subject. He is one sharp person, and has extensive experience with military aircraft. He shares my concerns. So much so, that in Ty’s bikes before the 450’s came out, Jim modified the OEM filter by adding a magnet close to the relief hole to attempt to pick up any ferrous metal not caught by the two filters on his bike.
I have good contacts within Yamaha in Japan. One of these contacts is the primary engine engineer at Yamaha for this bike. I’ll attempt to contact him via e-mail and get some answers.
Posted March 31, 2003 - 07:12 PM
Are you saying that you saw bikes suffer oil starvation from the use of SS filters? As I am sure you know, oil starvation can occur for a variety of reasons. Cold starting, wrong weight oil in the wrong climate, dirty oil, et cetera. I have even heard of oil starvation occurring because of 10w50 oils not passing freely from the the oil pump spray nozzle.
I want you to know that I appreciate your input. Any information that you can get for us on this subject will be greatly appreciated. When you contact Yamaha, it would sure be nice if they could also provide a micron rating for their paper filters. Not just average but, the largest sizes passed. Also, flow rates would be nice. In addition, can you find out if the paper they use is resign impregnated or ??? and, how many pleates per inch are used?
Thanks for joining ThumperTalk! It is folks like you that make this site such a great resource.
Posted April 04, 2003 - 06:50 PM
Posted April 05, 2003 - 02:23 AM
Don't get hung up on all this micron rating BS, the range all these filters are in is fine. Just change your oil often.
Posted April 05, 2003 - 04:59 AM
If you don't change it often , it might be a little more of an issue. Oil is cheap, filters are cheap. Do it.
Posted April 05, 2003 - 06:33 AM
Posted April 05, 2003 - 09:37 AM
Posted April 05, 2003 - 03:56 PM
Precisely my point. NASCAR teams use both a mesh type filter AND a paper filter. They indeed do rebuild their engines after most every race. Most teams run anywhere from a 12 - 18 quart system. The WR 450 hold about 1 1/4 quart. The power generated per cubic inch by our YZ/WR 450's are likely close to that of a BGN or WC motor.
Consider the facts cited above and determine for yourself what protection you feel appropriate for your engine.