Quick Take
Suspension work is usually driven by one specific symptom: a snowmobile spring that is no longer doing its job, a rear shock that needs replacing, a front arm that feels loose, or a motorcycle that sits too tall for comfort. Four powersports suspension parts are covered here: a model-specific Ski-Doo spring, a rear gas shock assembly, a Polaris left front trailing arm, and an adjustable motorcycle rear lowering-link kit. The decision is less about total budget and more about matching the part to the worn component or ride-height preference you have in mind.
There is a simple dividing line across these four parts: the spring, shock, and trailing arm are replacement components, while the lowering-link kit is a ride-height adjustment. Keep that distinction in mind while weighing the options below.
Listed-Price Comparison
| Component | Listed Price | Price Bar |
|---|---|---|
| SPI Suspension Spring-Right (Ski-Doo Summit Sport Power TEK 800R) | $37.75 | |
| SPI Rear Suspension Gas Shock Assembly SU-04323 | $135.45 | |
| SPI Left Front Suspension Trailing Arm (Polaris 700 XC EDGE F/O) | $125.41 | |
| Rear Suspension Lowering Links Kit Motorcycle Drop Link | $66.08 |
Decision Matrix
| Component | Choose it if... | Move on if... |
|---|---|---|
| SPI Suspension Spring-Right (Ski-Doo Summit Sport Power TEK 800R) | you need a spring aimed at the 2012-2014 Ski-Doo Summit Sport Power TEK 800R | your snowmobile is outside that model-year range |
| SPI Rear Suspension Gas Shock Assembly SU-04323 | you need a rear gas shock designed to work with OEM bushings, springs, and collars | you are actually after a spring, trailing arm, or lowering link |
| SPI Left Front Suspension Trailing Arm (Polaris 700 XC EDGE F/O) | you need a left-side front trailing arm for the 2004 Polaris 700 XC EDGE F/O | your machine is a different Polaris model, year, or side |
| Rear Suspension Lowering Links Kit Motorcycle Drop Link | you want an adjustable motorcycle drop-link kit matched to GSXR600 drop links | you need a shock, spring, or suspension arm instead of ride-height links |
Product Notes
SPI Suspension Spring-Right for 2012-2014 Ski-Doo Summit Sport Power TEK 800R
At $37.75, this is the lowest listed price in the comparison. The new spring is identified as a Spring-Right part for the 2012-2014 Ski-Doo Summit Sport Power TEK 800R, and it carries a Sports Parts Inc part number. If you already know your Summit needs a spring, this is the option to check first because the fitment is spelled out in the product title. The trade-off is the same specificity: this is not a universal spring, so you should set it aside if your snowmobile is a different Ski-Doo model or model year than the one in the title.
SPI Rear Suspension Gas Shock Assembly SU-04323
Priced at $135.45, this is the highest listed option here and also the only listed rear suspension shock assembly. It is a new SPI performance/aftermarket gas shock, referenced by part number SU-04323, and it is designed to work with OEM bushings, springs, and collars. That makes it a useful middle step if you are keeping your factory spring hardware and replacing the shock itself. The limitation is that this is a shock assembly rather than a full spring-and-collar package, so it is best treated as the shock portion of a larger rear-suspension setup.
LEFT Front Suspension Trailing Arm Polaris 700 XC EDGE F/O 2004 SM-08133RD-L
At $125.41, this left front suspension trailing arm targets a specific machine: the 2004 Polaris 700 XC EDGE F/O. The product title identifies the side as LEFT, so shoppers replacing a right-side arm will want a different part. It is a new SPI-Sport Part intended for the Polaris make, model, and year shown in its title, which removes some guesswork if your snowmobile matches. The limitation is exactly that narrow scope. For anyone working on a different year, a different Polaris platform, or the opposite side of the same sled, this particular arm is not the one to order.
Rear Suspension Lowering Links Kit Motorcycle Drop Link Adjustable
Listed at $66.08, this two-piece motorcycle rear lowering-link kit is the option to look at when you want to lower ride height rather than replace a worn suspension component. The product title identifies it as adjustable, it is paired with GSXR600 drop links, and it lowers the frame of the motorcycle, making it easier to handle and easier to install. That makes it a different kind of part: a ride-height adjustment aid rather than a spring, shock, or trailing-arm replacement. If your sportbike is not a GSXR600-type setup, you will need a different fitment, but for someone looking to lower an already-running motorcycle, this is the only drop-link option in this comparison.
Final Recommendation by Use Case
- If the job is replacing a spring, the SPI Suspension Spring-Right is the direct model-specific choice.
- If the job is installing a rear gas shock that can reuse existing spring hardware, the SPI Rear Suspension Gas Shock Assembly SU-04323 is the shock option here.
- If the job is a left front trailing arm, the SPI left front trailing arm is the side-specific part to target.
- If the job is lowering motorcycle ride height, the Rear Suspension Lowering Links Kit covers that use case.
