Penton Owners Group

General Discussion => Penton Talk => Topic started by: Tim Grow on October 15, 2008, 07:38:05 AM

Title: Marzocchi 40mm forks/82' GS250 - help
Post by: Tim Grow on October 15, 2008, 07:38:05 AM
Morning-
My efforts to identify the amount of oil, recommended viscosity, and measurement from the top of the damper-rod, etc have not been successful w/the 40mm fork.  Any direction would be super.  
Thank you!
Tim
Title: Marzocchi 40mm forks/82' GS250 - help
Post by: brian kirby on October 15, 2008, 08:39:31 AM
Hi Tim,

I dont have specs on those forks specifically but I do the same thing with any damper fork. I use ATF (about 5 wt) and put in 6" from the top of the fork with it collapsed and the springs out. As you know, I am a bit smaller than you so you would probably be good to start with 15 or 20wt.

Brian

'73 Berkshire Team  d-Con
//www.d-conproducts.com America's #1 Rodent Control Brand
Title: Marzocchi 40mm forks/82' GS250 - help
Post by: Tim Grow on October 15, 2008, 05:25:44 PM
Brian-
Very much appreciate the response, sir.  Also, the detail is a bonus; thank you!  There appears to be a bunch-more going on w/this damper rod system than any Husqvarna I've endeavored.  And yes, this project should have been started a bit earlier.
Best of week and safe travel to those making their way to Alabama.
Tim
Title: Marzocchi 40mm forks/82' GS250 - help
Post by: brian kirby on October 15, 2008, 05:35:29 PM
No problem Tim, I hope it helps you get the bike set up. I have always heard that ATF was 5wt, but I got a note from someone that it is closer to 20wt. I really dont know what ATF is, but I like the results I get with it. To be sure you might want to get a true fork oil with a specific weight.

Brian

'73 Berkshire Team  d-Con
//www.d-conproducts.com America's #1 Rodent Control Brand
Title: Marzocchi 40mm forks/82' GS250 - help
Post by: Big Mac on October 15, 2008, 07:23:41 PM
Have '83 250 40mm Marzokes, running ATF 6" from top of tubes, fully compressed, no spring. Works good, about right for heavy rider with shortened heavy springs + 2.5" solid spacer.