Installing 1.5x128, clutching?

Jeffz

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Location
Cresco, Iowa
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Snowmobile
2008 Yamaha Nytro RTX 40th
2007 Phazer "RTX"
I've done a little digging on here and couldn't find a solid answer. Am I going to need and clutch changes when going to this from a stock track? 08 RTX basically stock.
 
I went from 121” to 128” 1.6 ice cobra with no clutching changes
 


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