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CRF oils

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Posted by: andym---------------------

I'm wondering what oils I should run in my CRF. A local mechanic recomended ATF in the tranny and a moly oil in the motor. Does this sound like a good choice?


Posted by: smb_racing---------------------

do the CRF's have an oil sump for the engine seperate from the tranny? I haven't heard much about the engineering behind the engines, I just assumed that they'd take after every other four stroke and use the same oil for the gearbox and engine lubrication. :think


Posted by: ochster---------------------

andym is correct!


Posted by: andym---------------------

They have seperate oils for the engine and transmission.


Posted by: CRF ROCKS---------------------

I am currently using 10-30 pennz. synthetic automotive after break in. What is moly and what does it do,am I making a bad choice by using an oil that does not contain it.The local dealer did not have full syn. 10-30 in stock and I am on the east coast .I use Honda CR trans semi synthetic in the trans.I have been told that there is a brand of full synthetic trans.oil that is much better than Hondas semi syn.What is the deal, can someone please answer these important questions .


Posted by: Antman---------------------

A synthetic oil on the egine side is fine to use after break in. A semisynthetic or nonsynthetic-nonmoly should be used on the tranny side. A fully synthetic oil on the tranny side could cause clutch slippage as fully synthetic oil is super slippery. I use Castrol Syntec fully synthetic 10w40 on the engine side now that it is broken in. I use semisynthetic Valvoline 10w40 on the tranny side. No problems. Hope this helps.


Posted by: Rich Rohrich---------------------

Quote:
Originally posted by Antman
A fully synthetic oil on the tranny side could cause clutch slippage


Antman you're new here so before someone rips you a new one for that statement, you really should check your facts before you post things like that.


Posted by: Antman---------------------

andym Here is a more in depth reply.

Q: What about using Synthetic Oils in my clutch?
A: Synthetic oils, by their very nature of better heat resistance and improved lubricating properties, would seem to have an advantage. This is an advantage when it comes to lubricating an engine or transmission, but turns into a disadvantage when used in a clutch. This increase in lubricating properties (they are slippery) can cause an old, worn out clutch to fail. The purpose of the oil in a wet clutch is to cool, not to lubricate. The more 'slippery' an oil is, the more likely a clutch is to slip, resulting in increased heat and creating excessive wear.
While most high performance clutches are designed to work with synthetic oils, it is not recommended that they be used by most clutch manufacturers. Synthetic blends are usually considered acceptable.

This was copied using a search for motorcycle clutch slippage on Yahoo. Here is the link. http://www.nightrider.com/biketech/hdclutch.htm
I don't know if these are facts per se, but I think it is a generally accepted that super slippery oils and clutches are not a good combo. Thats my opinion and I'm sticking to it.


Posted by: Rich Rohrich---------------------

Have it your way buddy

You might want to stock up on Nomex underware.


Posted by: Strick---------------------

The ignorANT don't know they are ignorANT :mad: :mad:


Posted by: Rich Rohrich---------------------

Play nice or the thread goes into the wind:mad:


Posted by: Strick---------------------

The oil issue has really been playing with my nerves lately!


Posted by: yardpro---------------------

a little testy there rich? the guy is relaying information that he is getting from what he believs to be a reliable source. not everyone has the chemical enginering expertiese that you have. What he says would logically make sense. Even though I may agree with you, you were still a poopy head with him


Posted by: Rich Rohrich---------------------

Quote:
Originally posted by yardpro
What he says would logically make sense.


Only if it was accurate, which it clearly is not. The ability to parrot back bad information may qualify someone to be an editor at High Torque, but it won't make many friends around here.

Quote:
Originally posted by yardpro

Even though I may agree with you, you were still a poopy head with him


I'll try and struggle on through life knowing I haven't lived up to your high standards. :confused:


Posted by: yardpro---------------------

i know it will be an uphill battle, but please persevere


Posted by: Antman---------------------

Rich, If what I am posting is inaccurate. Please enlighten me. Thats what these posts are for, after all, is to help one another. I have heard from several different sources that I deemed reliable, that fully synthetic oil and wet clutches don't go together. If thats not the case. Please let me know why they do.


Posted by: RYDMOTO---------------------

Just for the record.....castrol syntec is NOT a true synthetic oil.Its a hydrocracked oil that is super pure.The moly added to it does make it more slippery though. http://www.brickboard.com/FAQ/700-9...cantData1.shtml check out this info....its very informative


Posted by: Rich Rohrich---------------------

Quote:
Originally posted by Antman
Rich, If what I am posting is inaccurate. Please enlighten me.


The internet is full of inaccurate information. here are a couple of sources known to be accurate.

http://www.ericgorr.com/techarticle...h_june_1999.htm

http://www.vtr.org/maintain/oil-overview.html


Posted by: Shaw520---------------------

Many of us, myself included, have been running 100% synthetic oils in our wet clutches for years. I've got two full seasons on the original clutch in my 520 with several abussive H/S's, a few motos, and ALOT of hard ridden weekends.


Posted by: 4Strokelover---------------------

Didn't Dualsport(Powroll) tested all kind of oils ?Didn't he say don't use synthetic, including Mobil 1 ?
Look at their webpage Powroll.com.


Posted by: Rich Rohrich---------------------

Quote:
Originally posted by 4Strokelover
Didn't Dualsport(Powroll) tested all kind of oils ?Didn't he say don't use synthetic, including Mobil 1 ?
Look at their webpage Powroll.com.


That's not exactly the way the conversation went.
The thread this was discussed in is here
http://www.dirtrider.net/forums3/sh...eferrerid=16241

Feel free to take the advice that brings you the most piece of mind, because for average riders with good maintenance habits that's all you are buying at the oil counter anyway.



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