2020 Clutching Question Adjustable Weights - Page 2 - HCS Snowmobile Forums

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Old 01-03-2020, 12:32 PM   #11 (permalink)
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Originally Posted by team1 View Post
If do not go adjustable weight route I found primary spring 85/205 and J14-74 weights work good to cure over rev on Ctec's
That's the stock weights for the 2020 ZR. What color of spring is the 85/205.
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Old 01-03-2020, 12:57 PM   #12 (permalink)
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Rod how many miles do you have on your sled?

Hopefully your spring is the answer.

I wish I would have known that before I ordered the adjustable cam arms. With a spring there is no adjusting.
Only around 60 miles but about 10 of those are 1/4 mile runs lol
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Old 01-03-2020, 12:59 PM   #13 (permalink)
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Current Sled(s): 2020 ZR 8000 LTD IACT
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Only around 60 miles but about 10 of those are 1/4 mile runs lol

Keep us informed how the spring/RPMs do after you get 300+ miles when sled is broke in.
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Old 01-03-2020, 01:05 PM   #14 (permalink)
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If it’s over revving from start to finish then a simple spring swap is a cheap and simple way to fix it

If the shift rate is off at different points then a helix or weights are in order

TBH weights are one of the last things I change. It’s hard to get right and can also do funky things to how your secondary shifts
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Old 01-03-2020, 01:06 PM   #15 (permalink)
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Keep us informed how the spring/RPMs do after you get 300+ miles when sled is broke in.
I will for sure.
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Old 01-17-2020, 01:41 PM   #16 (permalink)
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I took a slightly different approach to control over rev. I found over rev worst early in the shift and not as bad at full shift. Also seems like the motor was revy and didn't accelerate quite as quick as it should. I found as part of this backshift to be almost too aggressive so here is what I did. I actually used a stock 2017 (998) turbo primary spring 120/285 which is 20 lbs heavier at finish. Then I put Dalton 73 gram base weights in and added about 4.2 grams all towards the tip for a total of 77.2 grams. Sled leaves at 7950 and stays at 8050 right through. Is 3-4 sled lengths faster in 1000 feet than stock with no other changes.
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Old 01-18-2020, 01:53 PM   #17 (permalink)
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it would be really helpful if you guys posting spring info, to post the cat part number, or where you got the spring you are talking about, since all mfgr's and performance shops seem to test and market their spring specs differently. TIA. Ski
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Old 01-19-2020, 12:03 AM   #18 (permalink)
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Previous Sled(s): 14 XF 7000 10 F8 SP,05 F6,02 ZL 600SS, 99 ZL 600, 96 Pantera
Location: Central, MN
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19-20 Mileage: 1425
18-19 Mileage: 1170
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I have 2-2-1 with 540 miles on sled. Still climbs to 8200 - 8300 in a half mile wot run hard pack trail. Should I add more weight to tip maybe go 2-2-2 or even more in tip?

Or do you guys think I should go with a different primary spring and start over with weights.

Thanks
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Old 01-19-2020, 12:14 AM   #19 (permalink)
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When is it going to 8300, pretty early in run or near top speed? I prefer to keep the weight closer to the heel it just seems to work better but it it's climbing in rom toward the end of a pull you could add something to the tip
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Old 01-19-2020, 12:18 AM   #20 (permalink)
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Current Sled(s): 2020 ZR 8000 LTD IACT
Previous Sled(s): 14 XF 7000 10 F8 SP,05 F6,02 ZL 600SS, 99 ZL 600, 96 Pantera
Location: Central, MN
Favorite Riding Area: Central MN
19-20 Mileage: 1425
18-19 Mileage: 1170
17-18 Mileage: 1260
16-17 Mileage: 960
Age: 59
Riding Since: 1972
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It seems to hit 8300 around 75 mph doesn't go over 8300. Top speed on good packed trail (field) was 103 speedo.
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