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Old 09-03-2019, 07:28 PM   #1 (permalink)
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Hey men, I picked up a 2019 Indy xc 129! Has 1,000 miles on her and today I pulled the belt to start fall cleaning/prep. Saw this on my clutches and was just wondering with this new Polaris belt if you have this also? Primary has been balanced per seller and he ran different weights (I will ask again) Speedo recall says 121 so I feel he had this dialed in. Just never had marks in past sleds like this. First pic is Primary and second in Secondary for your viewing pleasure.
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Old 09-03-2019, 09:07 PM   #2 (permalink)
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Serious belt slip going on from something. I’d clean everything and then check that neither the primary or especially the secondary spring is not broke, then check alignment. If all are good put a new belt on and try it.
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Old 09-03-2019, 09:19 PM   #3 (permalink)
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First off 121 is unlikely especially when your pics show only 3/4 of the primary being used .
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Old 09-03-2019, 09:26 PM   #4 (permalink)
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The black marks down low on the primary are fairly common. The one up high makes me think someone was spinning the shit out of the track and then it grabbed and slipped the belt bad. Track may have been going 121, not the sled.
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Old 09-03-2019, 10:55 PM   #5 (permalink)
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Once I saw that ring that is what I thought about top speed also, must have been a frozen dirt road speed with nothing but track spin. Fools gold, dreameter speed. I will be taking it all apart this week to clean and check secondary spring and sneak this in.
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Old 09-04-2019, 06:36 AM   #6 (permalink)
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Quote:
Originally Posted by Axys180 View Post
Once I saw that ring that is what I thought about top speed also, must have been a frozen dirt road speed with nothing but track spin. Fools gold, dreameter speed. I will be taking it all apart this week to clean and check secondary spring and sneak this in.
on a stand pretty easy to get 121 mph on the ground not a chance with what the drive clutch looks like. i've seen a 550 do 90+ on a stand. had a bunch of broken driven springs on the xc 850. yes get that roller bearing. use one delrin washer in the roller plate and use a blk.grn 140/220 driven spring. get some 76 gram E.P.I. belly buster weights. stock drive spring. 120 mph will be possible. you want to see 8000-8100 peak rpm @ wot. put a very little bit of grease on the bearing. lucas red& tacky works the best. grease stays put and can handle 500+ degrees. your driven clutch should never get hotter than 100 degrees.
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Old 09-04-2019, 11:51 AM   #7 (permalink)
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Those marks could have happened when in reverse if a non-ER helix was used.

In addition, if someone geared the sled lower than stock, it could easily hit 121 mph on an uncorrected speedo. Speed is picked up on the brake disc.
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Old 09-04-2019, 08:41 PM   #8 (permalink)
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Looks like he got 121 on the stand to impress sale, and while doing that jammed on the brakes while on stand.
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Old 09-04-2019, 09:58 PM   #9 (permalink)
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If I'm selling a sled the clutches (& everything else) would be spotless.
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Old 09-06-2019, 02:46 PM   #10 (permalink)
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What engine? If it’s a 800 start with new motor mounts. Granted it was a older 800 but I could tell every time my mounts were going by the amount of rubber on my clutch’s.


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