Gear down

[rydningen]

You shouldn't need a tensioner if you're replace both pulleys. The Axys pulley are a one for one on size (Axys top is +1 and the bottom is -1 compared to the '14/'15 pulleys).

Interesting!

I see Burandt recommending a ratio of 2.25 with the gearing kits he sells for the axys, but as far as i can see that is exactly what is achieved if the pre 15 pro QD pulleys are put on an axys with the 7tooth(7percent difference from the 8tooth right?).

Have both a 8tooth driveshaft and some 21 44 QD pulleys from the previous pro, I was planning to get rid of the 7t, but didnt quite want to spend 700usd on a gearing kit, but this changes it all!

 

[Sage Crusher]

The Fire N Ice unit is not really a tensioner- it is a tool to keep the QD belt from ballooning outward to keep the belt in constant contact with the pulleys
it is not intended to back bend the belt. The TKI conversion allows more complete full wrap of the belt around the top pulley and uses a tensioner to back bend the belt-- Mucho better than the stock set up IMHO- and no special tools required to change the belt

From Paul's web.....

" Belt deflection guide kit prevents the Polaris Quick-Drive belt from ballooning out & crawling up onto the drive pulley cogs while under deceleration."

View attachment 267288

S/C

 

[richracer1]

Interesting!

I see Burandt recommending a ratio of 2.25 with the gearing kits he sells for the axys, but as far as i can see that is exactly what is achieved if the pre 15 pro QD pulleys are put on an axys with the 7tooth(7percent difference from the 8tooth right?).

Have both a 8tooth driveshaft and some 21 44 QD pulleys from the previous pro, I was planning to get rid of the 7t, but didnt quite want to spend 700usd on a gearing kit, but this changes it all!

Which Axys? The QD equipped sleds are already 2.23. Using the '15 QD pulleys with the 2.86 7T drivers will gear it to 2.39.

As for doing the pulley swap, do so at your own risk. I make no promises of any long term reliability from this change. I look at my belt all the time for signs.

 

[rydningen]

Which Axys? The QD equipped sleds are already 2.23. Using the '15 QD pulleys with the 2.86 7T drivers will gear it to 2.39.

As for doing the pulley swap, do so at your own risk. I make no promises of any long term reliability from this change. I look at my belt all the time for signs.

Ok, what factor do you use when estimating the effective ratio with the 7t vs 8t?


EDIT:

Just found this thread: http://www.snowest.com/forum/showthread.php?t=369638

Answered all my questions, I was using a factor of .93 and not .88 when calculating final drive ratio with the 8 vs 7 tooth 2.86" drivers.

 

[gerrman]

The 8 tooth/2.86 Pitch is the starting point. Currently the QD gear ratio on my 163"/2.6 Axys is 1.96. The 7 tooth drivers effectively lowers that ratio by 12.5%. People have been rounding that to 12%. (100%-12%=88% =0.88 as a decimal value) The conversion is Actual Ratio/0.88......Therefore 1.96/.88 gives 2.227, rounded to 2.23 using 7 tooth drivers. I am installing my TKI Axys Kit with an actual ratio of 2.10. So 2.10/0.88 = 2.386 or 2.39. Hope this helps. Mountain Horse has a Thread on ratio conversions.

Ok, what factor do you use when estimating the effective ratio with the 7t vs 8t?


EDIT:

Just found this thread: http://www.snowest.com/forum/showthread.php?t=369638

Answered all my questions, I was using a factor of .93 and not .88 when calculating final drive ratio with the 8 vs 7 tooth 2.86" drivers.

 

[xmk1080]

Don't need any kind of tensioner on the QD. The 14/15 QD pulleys are a one for one swap (14 pulleys are -1 on the top and +1 on the bottom in regards to the '16 pulleys). I do have a Fire n Ice belt deflection kit, but in no way puts any tension on the belt.

Yes your on the the right track but you will need some sort of belt tensioner, you are making this work because of the belt deflector that you are running. As your taking one tooth out of the top and adding one tooth to the bottom your pulleys they are not going to have the same belt tension, it will actually be a little looser. Its because the pulls are different diameter and the top on is going to shrink a lot more that the bottom is going to grow.

I'm running the tki gear drive set up with 8 tooth 2.86 pitch drivers with 2.42 gearing at 10,000 ft and it works awesome! Belt rides higher in the primary, better on and off throttle response, plus cooler belt temps! I also made some clutching changes and ditched the shock belt

 

[WFOWA]

How many teeth are on the bottom pulley of the TKI kit for Axys? Their website doesn't say.

http://www.shop.tkicnc.com/2016-2017-Polaris-Axys-26-Belt-Drive-TKI-BDP1626.htm

 

[ullose272]

I put the pro pulleys on my axys and it seams just as tight as stock pulleys fwiw

Sent from my SM-G900V using Tapatalk

 

[Teth-Air]

How many teeth are on the bottom pulley of the TKI kit for Axys? Their website doesn't say.

http://www.shop.tkicnc.com/2016-2017-Polaris-Axys-26-Belt-Drive-TKI-BDP1626.htm

From memory 63. Don't try and compare that to sock though as the spacing is different.

 

[Teth-Air]

Yes your on the the right track but you will need some sort of belt tensioner, you are making this work because of the belt deflector that you are running. As your taking one tooth out of the top and adding one tooth to the bottom your pulleys they are not going to have the same belt tension, it will actually be a little looser. Its because the pulls are different diameter and the top on is going to shrink a lot more that the bottom is going to grow.

I don't agree with you. One tooth spacing is a preset measurement, if you take it off one gear and add it to the other, it must be the same tension.