Teth-Air
Active VIP Member
Sled is really working well but it did take some time to tweak to get it the way I like.
The biggest hurdle has been the mapping as it is slower to respond on the bottom end and runs fat compared to the 800HO. This is at 4500 RPM and once through that it rips. Here is what I did to deal with this so far:
Clutching. Primary, dropped to 66 gram EPI weights, dropped to a 105/300 primary spring. Secondary, increased the spring to a 170/240 and added the radial roller bearing beneath the spring cup. Also replaced the helix to a 60/44 angle from the straight 42.
What this did is keep the nice low engagement while lightening the clutch to pull through the 4500 RPM range easier. The sled hits 8350 RPM and backshifts much better too. There was a slight loss in mid-speed pull but the sled is very smooth and top end is excellent. I run the TKI belt drive but is geared stock ratio (2.32 or 2.52 equivalent to 8 tooth drivers) I will try some alternate gearing to see if I can recover the mid-speed pull. Also I have some adjustable weights on back order that I can load the heel to see if this can help. The TKI accelerates noticeably better than the chain setup. We switched back and forth between 2 exact same sleds with only this change, prior to doing other mods.
Additionally I have changed to hotter spark plugs and have about 6 rides on them and they definitely reduce fouling. They still look wet but the sled runs much crisper.
For suspension and handling I have tightened the front skid shock to make the sled roll side to side easier, this has allowed me to stay more centered more often as I have found If you stay center you can react much faster in change of direction rather than try to jump side to side for "wrong foot forward". The rear shock needed a bit of tightening too to reduce bottoming and control for climbing but this 174 is much better for controlled climbing than the 163 I had. With the front skis set at 36" this sled will tend to dive easier so I had to tighten the ski shocks springs too. This makes the steering a little heavier but I just turn the dampening down a bit on set up snow.
For other accessories I put on the SLP trail can with the muffpot bracket. (nice option), a Skinz windshield bag, a Polaris tunnel bag, Ice Storm reversible scratchers and a Laser Phantom Teth-Air, cordless tether system.
Not that it means much but we had a little race this past weekend, my sled, a 2018 AXYS 155 800HO and a 2018 175 G4. The 2 Polaris's were fastest with the 174 out front slightly due to traction and the Doo was last.
In a longer race I would expect the 155 would have gone past my sled.
For steep and deep this sled gives me crazy confidence. I did not expect to be able to handle it so well on super steep, tree littered slopes. As the track spins so easy it feels like a shorter sled yet behaves much better without wheelieing out of control. There is also much less "push" than expected when trying to make a "$hit hook" turn.
I must say this sled is the best Polaris I have had so far and expect they will only get much better with a few updates from the factory e.g. slight mapping change.
Can't wait to get out on it soon.
The biggest hurdle has been the mapping as it is slower to respond on the bottom end and runs fat compared to the 800HO. This is at 4500 RPM and once through that it rips. Here is what I did to deal with this so far:
Clutching. Primary, dropped to 66 gram EPI weights, dropped to a 105/300 primary spring. Secondary, increased the spring to a 170/240 and added the radial roller bearing beneath the spring cup. Also replaced the helix to a 60/44 angle from the straight 42.
What this did is keep the nice low engagement while lightening the clutch to pull through the 4500 RPM range easier. The sled hits 8350 RPM and backshifts much better too. There was a slight loss in mid-speed pull but the sled is very smooth and top end is excellent. I run the TKI belt drive but is geared stock ratio (2.32 or 2.52 equivalent to 8 tooth drivers) I will try some alternate gearing to see if I can recover the mid-speed pull. Also I have some adjustable weights on back order that I can load the heel to see if this can help. The TKI accelerates noticeably better than the chain setup. We switched back and forth between 2 exact same sleds with only this change, prior to doing other mods.
Additionally I have changed to hotter spark plugs and have about 6 rides on them and they definitely reduce fouling. They still look wet but the sled runs much crisper.
For suspension and handling I have tightened the front skid shock to make the sled roll side to side easier, this has allowed me to stay more centered more often as I have found If you stay center you can react much faster in change of direction rather than try to jump side to side for "wrong foot forward". The rear shock needed a bit of tightening too to reduce bottoming and control for climbing but this 174 is much better for controlled climbing than the 163 I had. With the front skis set at 36" this sled will tend to dive easier so I had to tighten the ski shocks springs too. This makes the steering a little heavier but I just turn the dampening down a bit on set up snow.
For other accessories I put on the SLP trail can with the muffpot bracket. (nice option), a Skinz windshield bag, a Polaris tunnel bag, Ice Storm reversible scratchers and a Laser Phantom Teth-Air, cordless tether system.
Not that it means much but we had a little race this past weekend, my sled, a 2018 AXYS 155 800HO and a 2018 175 G4. The 2 Polaris's were fastest with the 174 out front slightly due to traction and the Doo was last.
In a longer race I would expect the 155 would have gone past my sled.
For steep and deep this sled gives me crazy confidence. I did not expect to be able to handle it so well on super steep, tree littered slopes. As the track spins so easy it feels like a shorter sled yet behaves much better without wheelieing out of control. There is also much less "push" than expected when trying to make a "$hit hook" turn.
I must say this sled is the best Polaris I have had so far and expect they will only get much better with a few updates from the factory e.g. slight mapping change.
Can't wait to get out on it soon.
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