What fork springs? brand and type.

[yorkie_chris]

http://www.peterverdonedesigns.com/lowspeed.htm

well the 15w motul expert has a 77 cst@40c

[yorkie_chris]

A different site reckons it is 57cSt.

Originally Posted by barwel1992

well the 15w motul expert has a 77 cst@40c

OK, did you get that from another source as I can only see Motul Comfort on the table YC just posted.

What does that cst figure mean? Is that my problem?

[yorkie_chris]

I think motul make a number of oils with similar ratings. Source I have is not confirmed reliable either.

Best bet is to email motul.


Barwel be careful with that table, just because it is same maker and same SAE rating (5w, 10w, whatever) does not mean it's on about the same oil.
Look at silkolene... they make "fork oil 5W" and "Pro RSF 5" which are both nominally 5w but quite different oils.

OK, found a PDF from Motul

http://www.motul.com.au/product_line...LEND_CHART.pdf

15w = 57.1
50% 15w + 50% 10w = 45.1
10w = 35.9

It also says Factory line Medium 10w is 35.9 as well.

The peterverdondesigns page says damper rod forks should use 34

So I think I'm going to buy a bottle of the 10w and try that, then if it's not thick enough I'll buy another bottle of 15w and do a 50/50 mix.

Originally Posted by yorkie_chris

Barwel be careful with that table, just because it is same maker and same SAE rating (5w, 10w, whatever) does not mean it's on about the same oil.
Look at silkolene... they make "fork oil 5W" and "Pro RSF 5" which are both nominally 5w but quite different oils.

yeh i know because the fork oil i have "factory line" has a lower cst than the other motul comfort stuf

and searching for motul comfort brings back nothing so i presumed it was motul expert

[yorkie_chris]

I don't see why you press point when motul website proves your assumption was wrong.

i was just answering what you wrote



no need to blow a head gasket now is there

[yorkie_chris]

"I presume" is in the present tense, which implies you still presume despite being proven wrong. Seems a little odd.
Who is blowing gaskets, I do this for fun

Anyway it would be prudent to state if something isn't clear. People aren't too friendly if you advise them based on assumptions and guesswork and they then go and spend their money on the wrong thing.