Roller bearing in sec. clutch on my 600.. - HCS Snowmobile Forums

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Old 03-25-2020, 12:27 PM   #1 (permalink)
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Default Roller bearing in sec. clutch on my 600..

Found I had to test the "hype" with those roller thrust bearings. So ordered up 3 of them from an eastern supplier.
Decided to put one into my 600 first , as I never been thoroughly happy with its shifting / smoothness. Compared to my 850, it feels almost "jerky".
That was both with stock 160-240 spring and the soft blue/black 120-203 I tried. (No delrin washers)

During dismantling, twisting on the sheaves felt as smooth as pulling a roll of barb wire over a field of rocks, lol!
Some cleaning out , a delrin washer and a roller bearing and everything felt a whole lot smoother.

Had to take sled for a little spin as I was curious how it would work, especially with the soft spring - heard there was a risk of overshifting when using soft spring with the roller bearing.
The most noticeable thing was the enhanced smoothness at lower rpms/speeds. Much easier to ease into the throttle in loose snow, whereas before it would just hit hard and start digging down.

I think I'll do the 850 clutch tonight
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Old 03-25-2020, 12:30 PM   #2 (permalink)
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Are these bearings sitting under the helix cup? like delrin but better?
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Old 03-25-2020, 12:33 PM   #3 (permalink)
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yup,
I put first a delrin washer, then the bearing under the cup.
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Old 03-25-2020, 08:31 PM   #4 (permalink)
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Any pictures of the bearing and where did you purchase? Price?
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Old 03-25-2020, 10:02 PM   #5 (permalink)
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Quote:
Originally Posted by ivar View Post
yup,
I put first a delrin washer, then the bearing under the cup.
The first time I put one in was with a customer standing there waiting for his clutch.When you let go of the spring and the spring and cup start to rotate on its own you just know its going to make a big difference.
Its no Team Tied but its pretty damn good.The only unknown at this point is how long they last.
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Old 03-26-2020, 04:14 AM   #6 (permalink)
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Any pictures of the bearing and where did you purchase? Price?
There are more threads do be found on these in the indy and assault subfourums I think, just search roller bearing.
The preferred manuf. seems to be Koyo , but I couldnt find anyone in the US with reasonable shipping to Norway so I found some from Hong Kong instead. I guess we'll see how they hold up.
e.g.
https://www.ebay.com/itm/KOYO-TORRIN...EAAMXQfFJRQLae

I was puzzled at of how rough the clutch felt (Maybe I can call it the Team TiRed?) , a good cleaning and some delrin washers probably would have made a noticeable difference too. 3K miles on the sled and I suspect the friction has been there almost since nee.

But - everytime I work on a team - I miss my good ole button clutches, lol! Last night I broke my screwdriver when trying to undo those pesky screws holding the helix
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Last edited by ivar; 03-26-2020 at 04:17 AM.
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Old 03-26-2020, 02:19 PM   #7 (permalink)
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Quote:
Originally Posted by ivar View Post
Found I had to test the "hype" with those roller thrust bearings. So ordered up 3 of them from an eastern supplier.
Decided to put one into my 600 first , as I never been thoroughly happy with its shifting / smoothness. Compared to my 850, it feels almost "jerky".
That was both with stock 160-240 spring and the soft blue/black 120-203 I tried. (No delrin washers)

During dismantling, twisting on the sheaves felt as smooth as pulling a roll of barb wire over a field of rocks, lol!
Some cleaning out , a delrin washer and a roller bearing and everything felt a whole lot smoother.

Had to take sled for a little spin as I was curious how it would work, especially with the soft spring - heard there was a risk of overshifting when using soft spring with the roller bearing.
The most noticeable thing was the enhanced smoothness at lower rpms/speeds. Much easier to ease into the throttle in loose snow, whereas before it would just hit hard and start digging down.

I think I'll do the 850 clutch tonight
Been through all that with 6-800 sleds here. I guess any improvement it makes is probably equal to the coast of the mod.
On another note a good setup for the team tied is night and day better.
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Old 03-26-2020, 03:27 PM   #8 (permalink)
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Ivar, I did the needle bearing and steel washer on my 20 Indy 850 before it hit snow. I'll take it apart sometime by late spring for first lookover, after putting around 1,700 miles on it. I used the Delrins since around 04 but never thought about one instead of the steel washer with the needle bearing.
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Old Today, 11:27 AM   #9 (permalink)
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What's the benefit of this over just greasing up the delrin washer?

How does the thickness of washer + bearing affect spring rates?
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Old Today, 01:16 PM   #10 (permalink)
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in theory, less force needed to get sheaves starting to move should make everything work smoother and more responsive to smaller changes in throttle input / load
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