Evo fork oil - Page 3

crawsue · Today, 02:46 PM

Been rereading some threads including this one re the Evo Marzocchi forks , although I had mine “K-teched “ a couple of years ago I still feel that they are too firm, the invoice for the work is showing that they used “HPSF -017 “ in the rebuild. I notice in this thread that someone is running SAE 5 …..Unfortunately our technical sage Vince has stopped contributing at the moment, has anyone any experience in this field ? Regards Crawsue.

Dukedesmo · Today, 03:59 PM

My Monster forks are 916 Showa units which I took to Ktech for valve kit & re-spring as the springs from the 916 were too firm due to the Monster being a lighter bike.

Ktech used 5w oil in them (they also used 5w in my 916 Ohlins) when they did the job, IIRC they said because it makes them smoother/more progressive?

They work nicely but I found that they would bottom out under extreme braking. I asked Ktech and they advised to add an extra 5 or 10ml of oil to each leg. I did and this solved the bottoming out.

So I guess the oil and the quantity can be used to alter the way the forks work however, if they're just too firm then maybe you need lighter springs?

Today, 02:46 PM	#31
crawsue Bronze Member Join Date: Nov 2016 Location: Glasgow Bike: M1100evo Posts: 273	Evo fork oil. Been rereading some threads including this one re the Evo Marzocchi forks , although I had mine “K-teched “ a couple of years ago I still feel that they are too firm, the invoice for the work is showing that they used “HPSF -017 “ in the rebuild. I notice in this thread that someone is running SAE 5 …..Unfortunately our technical sage Vince has stopped contributing at the moment, has anyone any experience in this field ? Regards Crawsue.

Today, 03:59 PM	#32
Dukedesmo Registered User Join Date: Sep 2010 Location: Leics Bike: M900 Posts: 2,893	My Monster forks are 916 Showa units which I took to Ktech for valve kit & re-spring as the springs from the 916 were too firm due to the Monster being a lighter bike. Ktech used 5w oil in them (they also used 5w in my 916 Ohlins) when they did the job, IIRC they said because it makes them smoother/more progressive? They work nicely but I found that they would bottom out under extreme braking. I asked Ktech and they advised to add an extra 5 or 10ml of oil to each leg. I did and this solved the bottoming out. So I guess the oil and the quantity can be used to alter the way the forks work however, if they're just too firm then maybe you need lighter springs? __________________ M900, 916, LeMans II.