Replace
If all else fails, or if you've either worn out the OEM shocks or are looking for an upgrade in performance capabilities, you should look at buying a set of aftermarket shocks.
Many of the OE suppliers also offer high-performance shocks. Fox has its Zero Pros and Float R Evols. Walker Evans has its compression-adjustable air shocks and needle coil-overs. ARS-FX has its Exit line of race-grade coil-over shocks. Ryde FX has other shock options as well. You can even order shock upgrades through OEMs, like upgrading the shocks on your Summit to the HPG KYB shocks found on the Summit X-RS. You just need to determine what your objectives are (weight savings, hillclimbing, cornice drops) and how much you want to invest. Whatever you do, we promise you will come away with a whole new love for your snowmobile.