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2021 Kaos 155 to a 165''

C
Nov 19, 2009
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Hey guys for the 2021 kaos 155 Qd2 with 2.75'' track i want to put a 165 3'' track under it. Wondering if i am going to have to change the gear ratio? looking on polaris parts website and it looks like to me that the gears, helix,springs, and weights are the same for a 155/165. Is that right ? I would have thought some things would be different
 

kylant

Well-known member
Lifetime Membership
Mar 4, 2011
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CA
QD gears are the same. you will have to change track drivers
 

Scott

Scott Stiegler
Staff member
Lifetime Membership
Nov 1, 1998
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W Mont
Hey guys for the 2021 kaos 155 Qd2 with 2.75'' track i want to put a 165 3'' track under it. Wondering if i am going to have to change the gear ratio? looking on polaris parts website and it looks like to me that the gears, helix,springs, and weights are the same for a 155/165. Is that right ? I would have thought some things would be different

If your 155 is a Series 8, then you'll only need to replace it with the Series 8 165, rail extensions and some clutching.
 

IceAge Performance

Well-known member
Premium Member
Nov 26, 2007
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Gallatin Gateway, MT
Clutching and gearing is the same between the 2 variations.

165 rails, track and away you go!

That being said we do not recommend composit tracks on the stock introvert drivers as they have 'timing' issues. They run a little rough. Avid center drives or 'cat style' drivers make for a better operating setup from what we have seen.
 
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