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Old 03-01-2013, 10:22 AM   #16
Yardstick
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Originally Posted by KEELAYMONSTER View Post
Good to know. Thanks. We should ride sometime. I just moved to Pleasanton so I am even closer now.

I just ordered .64's from KTM Twins. I figured I would rather too stiff to avoid bottoming out.

Ill definitely be changing the fluid. ATF seems to be what a lot of people are using.

Does a higher fork oil level increase bottoming resistance?

Thanks everyone for all the replies.
I'm probably in the minority, but I think the rider is a less significant variable in determining spring rate with the 9X0's. You might be smaller than the average 9X0 rider, but the bike is still big and heavy. With less travel on the standard Adventure you have less cushion to absorb impacts too. You need that suspension to stay up in the stroke and the .64's will probably do well for you with less preload than your factory springs.

You will get a lot of opinions on fork oil and fork oil vs. ATF. You can compare viscosities and other properties on the chart toward the bottom of this page.
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Old 03-01-2013, 11:17 AM   #17
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I'm probably in the minority, but I think the rider is a less significant variable in determining spring rate with the 9X0's. You might be smaller than the average 9X0 rider, but the bike is still big and heavy. With less travel on the standard Adventure you have less cushion to absorb impacts too. You need that suspension to stay up in the stroke and the .64's will probably do well for you with less preload than your factory springs.

You will get a lot of opinions on fork oil and fork oil vs. ATF. You can compare viscosities and other properties on the chart toward the bottom of this page.

That was an interesting read. Im book marking that link for sure!

Still debating on fork oil viscosity and whether or not to go with ATF. Im still thinking heavier than the stock weight though.
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Old 03-01-2013, 11:20 AM   #18
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Originally Posted by KEELAYMONSTER View Post
That was an interesting read. Im book marking that link for sure!

Still debating on fork oil viscosity and whether or not to go with ATF. Im still thinking heavier than the stock weight though.
With cartridge forks the oil viscosity has less effect on high-speed compression/rebound versus low speed compression/rebound.

So that's something to keep in mind that you can create a bit of an imbalance.
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Old 03-07-2013, 12:24 PM   #19
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OK. Got the .64's installed Replaced the for oil with Maxima 5wt fork oil at 90mm level. I have 0 turns of preload, 15 turns rebound and 13 turns compression. Basically just put the dampning half way between the "standard" and "sport" setup. Unrelated I also pulled the steering stem apart, cleaned and re greased it while the forks were off.

First impressions are good. A LOT less dive under hard braking. I have yet to do some hard core offroad with it but it definitely seems better.

I'll keep everyone posted........now, to go find some sweet jumps to launch off of
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Old 08-20-2013, 01:38 PM   #20
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Long Term opinion...

These .64 are perfect. The only adjustments I've made are to reduce preload. My adjuster was already as far out as possible so I removed the spacer on top of the spring. That got it just right. I have riden some trails several times now and its an enormous difference. I no longer have to slow down for rain bars to avoid bottoming out I also commute 30 miles one way, every day. It hasnt lost any comfort however you do "feel" the road a bit more.

This was probably one of the best things I've done to this beast
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Old 08-20-2013, 03:04 PM   #21
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Originally Posted by KEELAYMONSTER View Post
These .64 are perfect. The only adjustments I've made are to reduce preload. My adjuster was already as far out as possible so I removed the spacer on top of the spring. That got it just right. I have riden some trails several times now and its an enormous difference. I no longer have to slow down for rain bars to avoid bottoming out I also commute 30 miles one way, every day. It hasnt lost any comfort however you do "feel" the road a bit more.

This was probably one of the best things I've done to this beast

That's a crazy-heavy spring for your weight. 56x13.0 was a good call...


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Old 08-21-2013, 07:44 AM   #22
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Think so?

Im not having any issues with the .64's. It still corners like a champ and is much more capable offroad.

I do have stock shim stacks and what not. Maybe the extra heavy spring is making up for that? I dont know really. Im no suspension guru
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Old 08-21-2013, 10:23 AM   #23
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.64 is far from a heavy spring for the front end on a 990. What do you weigh fully geared up?
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Old 08-22-2013, 12:15 AM   #24
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.64 is far from a heavy spring for the front end on a 990. What do you weigh fully geared up?
At the very most I would say 175 with gear and what not. I'm a little dude man!!! ""

Copied from the 1st page - about 1/2 way down
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Old 08-22-2013, 07:40 AM   #25
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At the very most I would say 175 with gear and what not. I'm a little dude man!!! ""

Copied from the 1st page - about 1/2 way down

What he said...
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