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Thread: Fork oil substitute? Reply to Thread
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  Topic Review (Newest First)
07-10-2012 09:06 PM
Wolfie
Quote:
finding Dextron II is coming harder and harder to find
The local cornvenience stores here still have it...my "Dothead" Mart has plenny...

10w AND 20w...A higher viscosity is used for 1) heavier bikes...2) constant fork travelling (like an MX course)....also, as Im sure you know, in colder weather to swith to lighter if meeded, and in brutal heat a heavier...
So with straight 10W, normal road riding w/o a load, would be fine...



07-10-2012 08:45 AM
Knifemaker
Quote:
Originally Posted by DaveT319 View Post
So what would the difference in feel be between 10W or 20W (equivalent) oils?
Difficult question to answer. Some info here:
http://www.strappe.com/suspension.html

There's a few videos online about forks and fork oil. Do a search for
"what weight fork oil to use"
07-10-2012 01:50 AM
DaveT319 So what would the difference in feel be between 10W or 20W (equivalent) oils?
07-10-2012 12:38 AM
slimvulcanrider
Quote:
Originally Posted by Wolfie View Post
Dex 2 never foamed on me...and the cleaning qualities are because its a super refined petro oil (as is kerosene and #2 fuel oil)...ever use Marvel Mystery ?...its basically ATF...but he should be good until he finds some straight 10 or 20 (which I prefer, btw)...heck, the summer is almost half over...
Dextron II and Dextron III are different.. I know Dextron III Foams because we use it on the HMMWV as power steering fluid, and to bleed the air out of the system, you turn the wheels hard clock right to hard clock left repeatedly with the engine running untill the pink froth is gone. Dextron II however does not, and when we have to substitue the latter for the first it is a little harder to bleed the air out because all you can see is an air bubble or two. However.. finding Dextron II is coming harder and harder to find as the auto manufacturers are starting to use Dextron VI and VII. Type FA ATF is even more rare to find.
07-10-2012 12:25 AM
Knifemaker
Quote:
Originally Posted by Wolfie View Post


Just a note, but I always used Bel-Ray (30w) in my motocross racing bikes... wasnt too costly back then...how much now ?...I might try it again...
It's around $13.00 a liter. Guess you might find it cheaper if you search online awhile.

I got some "on sale" for about $11.95 back when I did my Vulcan forks.(

(One liter is enough to do three Vukcan forks...)
07-09-2012 11:25 PM
Wolfie
Quote:
I used Bel-Ray 15w Fork Oil.


Just a note, but I always used Bel-Ray (30w) in my motocross racing bikes... wasnt too costly back then...how much now ?...I might try it again...



07-09-2012 11:12 PM
Knifemaker Just as a reference point.....

When I did the progressive spring install on my bike, I used Bel-Ray 15w Fork Oil. Many have done the same. I had a Plexistar 2 fairing one the front. The front end was ALOT better than the stock set up.

Personally.... I'll spend the extra few bucks and buy real "fork oil". After 40 years, I only use Bel-Ray fork oil. Biggest reason here is I know exactly how it's going to behave. ATF is just hit and miss. Granted, a cruisers front suspension is not as critical as a sport or race bike....but in my mind... Why compromise? If you can't tell the diffrence, I guess it does not matter. But if you know what your trying to fix in your front end, real fork oil from a company you have some experience in what they offer makes a diffrence.

The front end on my Vulcan when I was done was perfect for me. No jolts over road seams, no wallowing through fast turns, no excessive diving when braking.


You can use anything you want ... But if you really can't tell the diffrence between a properly set up suspension over one that isn't...it won't matter anyway.
07-09-2012 09:12 PM
Wolfie Dex 2 never foamed on me...and the cleaning qualities are because its a super refined petro oil (as is kerosene and #2 fuel oil)...ever use Marvel Mystery ?...its basically ATF...but he should be good until he finds some straight 10 or 20 (which I prefer, btw)...heck, the summer is almost half over...



07-09-2012 04:26 AM
slimvulcanrider I would be scared to run ATF in my forks since ATF is generally used as an engine flush agent in high millage and diesel engines. which means that there is some kind of detergent or abrasives in it. also.. when introduced with air Dextron III foams really badly, which could also give adverse handling to the suspension
07-09-2012 03:31 AM
Arsenic I think I'll go with the Dexron for now, since it would be free. This is all way more helpful than I could have imagined, thanks guys.
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