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SideWinder Gearing, Tracks and Drivers

MrSled

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Schofield, WI
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Snowmobile
2020 Sidewinder SRX
I just received this info from Yamaha on the gearing of the SideWinder Models.

Track Lengths: 129 – 137 = 9T Drivers x 2.86 Pitch & 21/41 Gearing

Track Lengths: 141 x 1.6 & 153 X 1.75= 8T Drivers x 3.00 Pitch & 21/41 Gearing

Track Lengths: 141 X 2.25 & 153 x 2.25= 8T Drivers x 3.00 Pitch & 24/50 Gearing

Track Lengths: 162 X 3.00 = 7T Drivers x 3.00 Pitch & 21/49 Gearing
 
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Are these number subject to change? Good info Tom !!!
 
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What's the top speed with the 8T 21/41?


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The Sidewinder models will use the 8JP belt - same belt as Viper
A yamaha demo rep also told me this when I asked at the dealer. Is there any concern this will be able to handle the extra hp of the sidewinder? Seems to me there's somewhat of a difference in hp/power between a viper and sidewinder. Would assume the SW would be harder on belts.
 
At 1 to 1 shift out at 8750 rpm the 21/41 calculates out to about 102 mph

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What's the top speed with the 8T 21/41?
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That was the gearing (21/41) and driver size (8T) in my Viper XTX w/MPI Trail Turbo this past season and seeing 100-105 on varying snow conditions was common - possibly a little more on ice/pure hardpack but I ride mostly trail/offtrail and didn't search out those conditions to try.
 
That was the gearing (21/41) and driver size (8T) in my Viper XTX w/MPI Trail Turbo this past season and seeing 100-105 on varying snow conditions was common - possibly a little more on ice/pure hardpack but I ride mostly trail/offtrail and didn't search out those conditions to try.
Is that the 141 1.6 cobra or did it have more lug than that?
 


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