DEALER CHANGED MY FORK'S OIL TO A 7.5W??

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S

scisneros

Joined
Jun 8, 2009
Messages
51
Location
Quito - Ecuador
Hello my friends:

I sent my fe450 (09) to the dealer in order to get a front suspension maintainance. They changed the suspensio oil in the forks but they told me they only have and work with KTM OIL 7.5w.

I am mainly an enduro rider and I´ve always used 5w in my forks, so is it going to be a better feeling or I should ask them to change the oil again to a 5w as the manual recommends'??

I was pretty happy with how it was before and I never compressed the forks to the top even in jumps.

I have a medium to advance skill and I race once in a while. I weight 165 pounds without gear.

Let me know please what you think about this before I talk to the dealer. This weekend I am going to see if I like it or not.

Greetings.

Sebastian
 
i've run 7.5 in the past but i usually use 5 wt and i weigh a good bit more than you.

i've just had my forks revalved and whilst discussing what i was after i was told that they were valved pretty soft as standard so maybe you'll get away with using 7.5

though the tuner who did my forks has used 5 wt.

take em for a ride and see what you think.
 
I agree, give them a try. But I'd ask them why they went to 7.5 instead of the 5 that the manual recommends. My guess is that the ride will be noticeably stiff and harsh, especially over the small stuff.

If you weren't using all the travel before, you'll probably use less now, not good.

It seems pretty straight forward, 5 wt set at a certain height, don't know why they wouldn't have done that.
 
the thinner oils feel nicer and make the silly stock rebound stacks work a wee bit better. they are also a bit better at letting bubbles disperse, downside is the bottoming cones don't work as well and there is a bit less lubricity in the outer chambers.

I used to have to use at least 22 Cst (5wt) to make the bottoming cones work but since I increased the travel to 322mm I can get away with 15Cst (2.5 Wt)

The 7.5 will probably feel harsher initially and make the forks pack on small bumps, most ATF is similar to 7.5wt
 
bushmechanic said:
I used to have to use at least 22 Cst (5wt) to make the bottoming cones work but since I increased the travel to 322mm I can get away with 15Cst (2.5 Wt)
Click to expand...
I've not been able to find any fork oil below 5 wt and it doesn't help that some brands of fork oil don't list the weight of the oil, they use their own names for it.
 
search for peter verdone designs there is a great list of viscosities there

also search BP for bartran HV 15 and caltex for rando HDZ 15 both oils also come in 32

Bartran HV 15 is a very good suspension fluid.
 
bushmechanic said:
search for peter verdone designs there is a great list of viscosities there

also search BP for bartran HV 15 and caltex for rando HDZ 15 both oils also come in 32

Bartran HV 15 is a very good suspension fluid.
Click to expand...
Thanks. Yesterday I did a search on 'cst' not knowing what is was, and came across some tables, and then a more extensive table here:

http://www.pvdwiki.com/index.php?title=Suspension_Fluid

It turns out that Spectro Ultra Light, which I had picked up previously is one of the lightest fork oils you can get.

I don't want it for my forks, I want a lighter oil in my steering damper which the manufacturer say they filled with '5 wt' which apparently doesn't mean anything according to the chart without knowing specifically which oil brand it is.
 
true 5Wt should be 21.5 Cst at 20 degrees. I think some manufactureers cheat and go thinner instead of better.

I use bartran HV 15 in my scotts damper
 
I have a Motorsportz steering damper. Off-road I use a setting somewhere between 1/4 on the 'soft' side to midway to the 'hard' or 'heavy' side. For my style and skill of riding - slow and inexperienced - I find that the damper has plenty of damping. However, on the pavement I would prefer to be able to set the damper even 'softer' to where there is less damping, so I want to use a lighter oil to that end. It appears I lucked out with the oil I found.
 

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