here's the driver/shaft asm for your sled #1590551
https://www.babbittsonline.com/oemparts/a/pol/6690de1bd04aaf11c2ee37f1/drive-train-jackshaft-driveshaft
here's the 24 boost assault... same #
https://www.babbittsonline.com/oemparts/a/pol/64812ae36845ad03f1941f59/drive-train-jackshaft-driveshaft
2" track uses 19/40 gearing and a different chain than the 1.352 which uses 23/40
https://www.babbittsonline.com/oemparts/a/pol/64812ae36845ad03f1941f56/drive-train-chaincase
plus helix and clutching....
CB Performance Parts
Camso Back Country X2 - 146" 9417C
The precision-engineered Camoplast Track BACK COUNTRY X2 - 146" 9417C is sure to improve performance on your snowmobile.idk what your end goal is but the 1.75 BCX2 seems to be a well regarded track and you're gaining 1/2" over the Cobra which is in reality a 1.25" lug. pretty sure the 1.75" was available on previous SB's and even some XCR's which might make gearing/clutching more straightforward. SB's with 1.5/1.6 ran 22/41 gearing. if you aren't reaching target peak RPM...
the Internet is an amazing thing... 🙄
https://www.babbittsonline.com/oemparts/c/polaris_snowmobile/parts
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Crnr2Crnr ·
