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Message started by Steddy58 on 01/03/14 at 04:11:16

Title: fork oil
Post by Steddy58 on 01/03/14 at 04:11:16

Hi,anyone recommend a good fork oil best weight or viscosity ,cheers

Title: Re: fork oil
Post by Dave on 01/03/14 at 04:22:19

15 weight fork oil.....or Automatic Transmission Fluid (ATF) work just fine.

Title: Re: fork oil
Post by SSG on 01/03/14 at 05:13:34

Just rebuilt my forks last month and used ATF. Works great! And easier to find.

Title: Re: fork oil
Post by Gyrobob on 01/03/14 at 07:03:03

302E372D29292B2A37757D7C71440 wrote:

Just rebuilt my forks last month and used ATF. Works great! And easier to find.

and cheap

Title: Re: fork oil
Post by motox56 on 01/04/14 at 15:44:35

How much oil in each leg, or what do you set the oil level at?

Title: Re: fork oil
Post by SSG on 01/04/14 at 16:36:27

I went step by step with the clymer. I used a liquid medicine syringe to get my correct distance that it calls for. Clymer says "add 441cc (14.91oz) and to check to oil level of 75mm(2.95in.)

Title: Re: fork oil
Post by WD on 01/06/14 at 11:01:47

I cheat. Drain forks. Collapse uppers into the sliders. Fill the tubes to the brim with the springs removed. Extend forks, drop the springs in, reinstall into the clamps.

ATF works fine, 15W40 motor oil works fine, 20W50 motor oil works fine. I still plan to swap mine out with GL-1 85W gear oil, can't stand fork dive, haven't found a springer I like for a reasonable cost yet.

Title: Re: fork oil
Post by verslagen1 on 01/06/14 at 12:09:53

That's about right wd. 15 oz. brings it to about an inch to inch and a half below the top with the springs in and top tubes collapsed.

We've had several occasions where someone had no oil at all and didn't realize it... so less won't hurt you.

Filling to the top will increase air pressure when bottoming out and increase the risk of blowing out the seals. So don't do any wheelies... wd! 8-)
But for us normal folk, guesstimating the spacers are about 10" long, adding an inch of oil will only increase the pressure 10%. That should be acceptable.

Title: Re: fork oil
Post by WD on 01/07/14 at 15:47:11

I've been running the same popped fork seals since 2/2/1998, the day I bought it brand new and rode it home. It loses a teaspoon or so per decade, not that big a deal.