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Stock 850 MY22 136/137's with 1.25" and 1.325" tracks will come with 1.61 (23/37) gearing (assuming). Curious if anyone has tested gearing on MY21 850's with the smaller lug tracks to determine if this is too tall and more gains are realized with shorter gearing....maybe a 1.68 (22/37) or 1.73 (22/38) gear ratio?
 

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Stock 850 MY22 136/137's with 1.25" and 1.325" tracks will come with 1.61 (23/37) gearing (assuming). Curious if anyone has tested gearing on MY21 850's with the smaller lug tracks to determine if this is too tall and more gains are realized with shorter gearing....maybe a 1.68 (22/37) or 1.73 (22/38) gear ratio?
didn’t see that change posted anywhere yet. But I did test as tall as 25/39 in my 21 with cobra 1.325. Did gain mph on ice but wasn’t as fun on trail.
 

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I would be interested in the gearing on the 1.6 Cobra version in the 136"
 

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22/38 gearing smoked the stock gearing to 1000' badly. again this is with a porta tree timing system. you know the lights the pro's use. stock gearing on the 850 on ice or perfect conditions will out top end the 22/38. but any snow at all. nope. last i knew most here are trail riders not ice races? so yes this has been tested to death by us.
 

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Discussion Starter #7
22/38 gearing smoked the stock gearing to 1000' badly. again this is with a porta tree timing system. you know the lights the pro's use. stock gearing on the 850 on ice or perfect conditions will out top end the 22/38. but any snow at all. nope. last i knew most here are trail riders not ice races? so yes this has been tested to death by us.
Thanks for chiming in Rick! Would the stock 1.61 geared sled even catch up and surpass a 1.73 (22/38) geared sled in lets say a quarter or half mile down a hard park road/lake?
 

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So how about the 1.86 gearing for the 1.6 for the 136” I thought I remember you saying that worked well.
yes it works well. but i geared my 129" storm track xc 850 up. 1.81 from 1.86 and found more top end without any loss on the low end. we have 136" xcr 850 with 1.6 cobra tracks snow checked. we are going to test this with 1.73/74 ratio and see how they do? i think it will pull it.
 

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So wouldn't a 22/37 (1.68) be an ideal ratio for the 1.25 and 1.3 tracks? A little more mid range pull than stock and maybe not any losses on top end?
 

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Discussion Starter #11
yes it works well. but i geared my 129" storm track xc 850 up. 1.81 from 1.86 and found more top end without any loss on the low end. we have 136" xcr 850 with 1.6 cobra tracks snow checked. we are going to test this with 1.73/74 ratio and see how they do? i think it will pull it.
Rick, my '21 VR1 850 137 w/ 1.5" Storm has the 1.74 gearing. I geared it taller from the stock 1.86 and the sled for sure pulled it for me and held WOT RPM. Gained mid and top speed versus stock (maybe 3-5 mph unofficially). Off the line, the gearing is still aggressive with the Storm track.
 

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So can anyone confirm the XCR comes 21/37 for the 1.25” tracks or are they all geared short for the 1.6 cobra like doo does ? First thing my doo buddies do with their xrs is gear it up as they all come with short gearing no matter the track. I’m swapping the 1.35 cobra for a 1.25 rip 2 as they are the best track that we have found to date for our riding style/area/conditions.
 

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So can anyone confirm the XCR comes 21/37 for the 1.25” tracks or are they all geared short for the 1.6 cobra like doo does ? First thing my doo buddies do with their xrs is gear it up as they all come with short gearing no matter the track. I’m swapping the 1.35 cobra for a 1.25 rip 2 as they are the best track that we have found to date for our riding style/area/conditions.
You should try an ice attack xt. Much better track than an ice ripper. Polaris gears each track differently. I’m guessing the xcr’s will come with 23/37 1.6 with the 1.25” track.
 

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You should try an ice attack xt. Much better track than an ice ripper. Polaris gears each track differently. I’m guessing the xcr’s will come with 23/37 1.6 with the 1.25” track.
I like the rip 2. Can’t beat the traction in hard pack or even in snow for trial track. We have tested about every combination you can come up with and for our trail sled the rip 2 with 1.63 triggers up the middle on double backers is always the best. I was just curious because the dealer wanted to have a 1.35 cobra on the shelf so that’s what they ordered my sled with, swapping it to the rip 2 1.25. So you think the 1.35 cobra specked sled wound be geared differently from factory then a 1.25 ice ripper ? Cause I want the taller gear if that’s the case. Ski doo sends them al out with the same gear no matter what you bought, which is y the boys all gear up their xrs’ and I want to be ahead of them guys. One new poo in the club (me) 2 new xrs, one 129” and one 137” plus we believe there is a rave rs comming to the group.
 

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I like the rip 2. Can’t beat the traction in hard pack or even in snow for trial track. We have tested about every combination you can come up with and for our trail sled the rip 2 with 1.63 triggers up the middle on double backers is always the best. I was just curious because the dealer wanted to have a 1.35 cobra on the shelf so that’s what they ordered my sled with, swapping it to the rip 2 1.25. So you think the 1.35 cobra specked sled wound be geared differently from factory then a 1.25 ice ripper ? Cause I want the taller gear if that’s the case. Ski doo sends them al out with the same gear no matter what you bought, which is y the boys all gear up their xrs’ and I want to be ahead of them guys. One new poo in the club (me) 2 new xrs, one 129” and one 137” plus we believe there is a rave rs comming to the group.
Cobra or ice ripper will have the same gearing from factory.
 
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