Primary Clutch Cover
BILLET PRIMARY CLUTCH COVER
Item: 440-90910
Brand : SPEEDWERX
Your Price: $189.95
BILLET PRIMARY CLUTCH COVER
440-90910
Weight: 2 lbs
Package Dimensions: 8 x 6 x 3
- Added tower bushing material without sacrificing shift range
- Tighter tower bushing tolerance
- Additional support and webbing to tie clutch towers together and prevent flexing
- Lighter than stock
- ADAPT models have increased material thickness and larger corner radiuses to strengthen failure prone areas
- Revised version for the 2025 858 models with the steel spider clutch
Segment: Snow
Division: Drive
Class: Clutch Kits & Components
Sub Class: Misc Components
Product fitment
Arctic Cat
2025
M 858 154/3.0
M 858 Alpha One 154/3.0
M 858 Alpha One Sno Pro 154/3.0
M 858 Mountain Cat 146/2.6
M 858 Mountain Cat 154/2.6
M 858 Mountain Cat 154/3.0
M 858 Mountain Cat 165/3.0
M 858 Mountain Cat ES 146/2.6
M 858 Mountain Cat ES 154/2.6
M 858 Mountain Cat ES 154/3.0
M 858 Mountain Cat ES 165/3.0
M 858 Mountain Cat w/ Atac 146/2.6
M 858 Mountain Cat w/ Atac 154/2.6
M 858 Mountain Cat w/ Atac 154/3.0
M 858 Mountain Cat w/ Atac 165/3.0
M 858 Mountain Cat w/ Atac ES 146/2.6
M 858 Mountain Cat w/ Atac ES 154/2.6
M 858 Mountain Cat w/ Atac ES 154/3.0
M 858 Mountain Cat w/ Atac ES 165/3.0
M 858 Sno Pro 146/2.6
M 858 Sno Pro 154/2.6
M 858 Sno Pro 154/3.0
M 858 Sno Pro 165/3.0
M 858 Sno Pro ES 146/2.6
M 858 Sno Pro ES 154/2.6
M 858 Sno Pro ES 154/3.0
M 858 Sno Pro ES 165/3.0
Riot 858 Sno Pro ES 146/1.35
Riot 858 Sno Pro ES 146/1.75
Riot 858 w/ Atac 146/1.35
Riot 858 w/ Atac 146/1.75
ZR 858 137 ES
ZR 858 R-XC 137
ZR 858 Sno Pro 137 ES
ZR 858 Sno Pro ES 129
ZR 858 W/ Atac 129 ES
ZR 858 W/ Atac 137 ES
BILLET PRIMARY CLUTCH COVER
Item: 440-90909
Brand : SPEEDWERX
Your Price: $189.95
BILLET PRIMARY CLUTCH COVER
440-90909
Weight: 2 lbs
Package Dimensions: 8 x 6 x 3
- Added tower bushing material without sacrificing shift range
- Tighter tower bushing tolerance
- Additional support and webbing to tie clutch towers together and prevent flexing
- Lighter than stock
- ADAPT models have increased material thickness and larger corner radiuses to strengthen failure prone areas
- Revised version for the 2025 858 models with the steel spider clutch
Segment: Snow
Division: Drive
Class: Clutch Kits & Components
Sub Class: Misc Components
Product fitment
Arctic Cat
2022
M 8000 Hardcore Alpha One 146
M 8000 Hardcore Alpha One 154
M 8000 Hardcore Alpha One 154 ES
M 8000 Hardcore Alpha One 165
M 8000 Hardcore Alpha One 165 ES
M 8000 Mountain Cat Alpha One 154
M 8000 Mountain Cat Alpha One 154 ES
M 8000 Mountain Cat Alpha One 154 ES w/ATAC
M 8000 Mountain Cat Alpha One 154 w/ATAC
M 8000 Mountain Cat Alpha One 165
M 8000 Mountain Cat Alpha One 165 ES
M 8000 Mountain Cat Alpha One 165 ES w/ATAC
M 8000 Mountain Cat Alpha One 165 w/ATAC
Riot 6000 146/1.35
Riot 6000 146/1.60
Riot 8000 146/1.35
Riot 8000 146/1.60
Riot 8000 146/1.60 w/ATAC
ZR 6000 Limited 137 ES
ZR 6000 RR 137 ES
ZR 8000 Limited 137 ES
ZR 8000 Limited 137 ES w/ATAC
ZR 8000 RR 137 ES
ZR 9000 Thundercat 137
ZR 9000 Thundercat 137 EPS
ZR 9000 Thundercat 137 EPS w/ATAC
2023
M 600 Alpha One 146
M 600 Alpha One 154
M 8000 Hardcore Alpha One 146
M 8000 Hardcore Alpha One 146 ES
M 8000 Hardcore Alpha One 154
M 8000 Hardcore Alpha One 154 ES
M 8000 Hardcore Alpha One 165
M 8000 Hardcore Alpha One 165 ES
M 8000 Mountain Cat Alpha One 146
M 8000 Mountain Cat Alpha One 146 ES
M 8000 Mountain Cat Alpha One 154
M 8000 Mountain Cat Alpha One 154 ES
M 8000 Mountain Cat Alpha One 154/3.00
M 8000 Mountain Cat Alpha One 154/3.00 ES
M 8000 Mountain Cat Alpha One 165
M 8000 Mountain Cat Alpha One 165 ES
Riot 600 146/1.75 ES
Riot 600 w/Atac 146/1.60 ES
Riot 600 w/Atac 146/1.75 ES
Riot 6000 146/1.60
Riot 8000 146/1.60
Riot 8000 146/1.60 w/ATAC
ZR 600 129/1.25 ES
ZR 600 R-XC 137/1.35
ZR 600 R-XC 137/1.35 ES
ZR 600 W/ Atac 129/1.25 ES
ZR 600 W/ Atac 137/1.25 ES
ZR 6000 137 ES
ZR 6000 R XC 129 ES
ZR 7000 137
ZR 8000 137 ES
ZR 8000 137 ES w/ATAC
ZR 8000 RR 137 ES
ZR 9000 RR 137
ZR 9000 Thundercat 137
ZR 9000 Thundercat 137 EPS w/ATAC
2024
M 600 Alpha One 154
M 600 Alpha One Sno Pro 146/2.6
M 600 Alpha One Sno Pro 146/3
M 600 Alpha One Sno Pro 154/2.6
M 600 Alpha One Sno Pro 154/3
M 8000 Hardcore Alpha One 146
M 8000 Hardcore Alpha One 154
M 8000 Hardcore Alpha One 165
M 8000 Mountain Cat Alpha One 146
M 8000 Mountain Cat Alpha One 154
M 8000 Mountain Cat Alpha One 154 ES
M 8000 Mountain Cat Alpha One 154/3.00
M 8000 Mountain Cat Alpha One 165
Pantera 7000 146
Riot 600 Snow Pro 146/1.35
Riot 600 Snow Pro 146/1.75
Riot 600 w/Atac 146/1.35 ES
Riot 600 w/Atac 146/1.75 ES
Riot 8000 146/1.60
Riot 8000 146/1.60 w/ATAC
Riot 9000 146/1.60 w/ATAC
ZR 600 129/1.25 ES
ZR 600 137/1.25
ZR 600 R-XC 137/1.35
ZR 600 Sno Pro 129/1.25
ZR 600 Sno Pro 137/1.25
ZR 600 W/ Atac 129/1.25 ES
ZR 600 W/ Atac 137/1.25 ES
ZR 7000 137
ZR 8000 RR 137 ES
ZR 9000 RR 137
ZR 9000 Thundercat 137
ZR 9000 Thundercat 137 EPS w/ATAC
2025
M 600 Alpha One Sno Pro 146/2.6
M 600 Alpha One Sno Pro 146/3
M 600 Alpha One Sno Pro 154/3
Pantera 7000 ES
Riot 600 135 ES
Riot 9000 w/ Atac EPS 146/1.35
ZR 600 137/1.25
ZR 600 R-XC 137/1.35
ZR 600 R-XC 137/1.35 ES
ZR 600 Sno Pro 129/1.25
ZR 600 Sno Pro 137/1.25
ZR 600 W/ Atac 129/1.25 ES
ZR 600 W/ Atac 137/1.25 ES
ZR 7000 137
ZR 9000 RR 137
ZR 9000 Thundercat 137 EPS w/ATAC
Upgrade Your Ride with the Primary Clutch Cover
The Primary Clutch Cover at Partiron is your key to enhanced performance and durability. Designed specifically for high-demand environments, this cover provides superior protection for your clutch system, ensuring smooth operation and resilience against wear and tear.
Engineered for Performance: Why Choose This Clutch Cover?
With added tower bushing material, this clutch cover maintains an optimal shift range while improving durability. The tighter tower bushing tolerance contributes to a more responsive clutch action, ensuring you can tackle any trail or track with confidence.
Innovative Design for Maximum Support
The Primary Clutch Cover includes additional support and webbing that ties the clutch towers together, preventing flexing during intense riding conditions. This innovative feature enhances the structural integrity of your clutch system, providing you with the reliability you need for every ride.
Lightweight Yet Tough
Weighing less than the stock option, this cover allows for improved performance without compromising on strength. Its lightweight design means less strain on your bike, helping you achieve better handling and agility on the road or track.
Revised for Modern Models
The updated version for the 2025 858 models features increased material thickness and larger corner radiuses. These enhancements strengthen areas prone to failure, ensuring longevity and superior performance under pressure.
Specifications
| Parameter | Value |
|---|---|
| Added tower bushing material | Yes |
| Tighter tower bushing tolerance | Yes |
| Additional support and webbing | Yes |
| Weight compared to stock | Lighter |
| Material thickness for ADAPT models | Increased |
| Larger corner radiuses | Yes |
| Revised version for 2025 858 models | Yes, includes steel spider clutch |
This product has variations, so please ensure you select the correct variation for detailed information.
FAQ
Is this clutch cover compatible with all models?
This clutch cover is specifically designed for select models, including the 2025 858. Please check compatibility before purchase.
How does the lightweight design benefit my ride?
The lightweight design reduces overall bike weight, improving handling and agility, allowing for a more responsive riding experience.
Fitment:
| Brand | Year | Model |
|---|---|---|
| Arctic Cat | 2022 | M 8000 Hardcore Alpha One 146 |
| Arctic Cat | 2022 | M 8000 Hardcore Alpha One 154 |
| Arctic Cat | 2022 | M 8000 Hardcore Alpha One 154 ES |
| Arctic Cat | 2022 | M 8000 Hardcore Alpha One 165 |
| Arctic Cat | 2022 | M 8000 Hardcore Alpha One 165 ES |
| Arctic Cat | 2022 | M 8000 Mountain Cat Alpha One 154 |
| Arctic Cat | 2022 | M 8000 Mountain Cat Alpha One 154 ES |
| Arctic Cat | 2022 | M 8000 Mountain Cat Alpha One 154 ES w/ATAC |
| Arctic Cat | 2022 | M 8000 Mountain Cat Alpha One 154 w/ATAC |
| Arctic Cat | 2022 | M 8000 Mountain Cat Alpha One 165 |
| Arctic Cat | 2022 | M 8000 Mountain Cat Alpha One 165 ES |
| Arctic Cat | 2022 | M 8000 Mountain Cat Alpha One 165 ES w/ATAC |
| Arctic Cat | 2022 | M 8000 Mountain Cat Alpha One 165 w/ATAC |
| Arctic Cat | 2022 | Riot 6000 146/1.35 |
| Arctic Cat | 2022 | Riot 6000 146/1.60 |
| Arctic Cat | 2022 | Riot 8000 146/1.35 |
| Arctic Cat | 2022 | Riot 8000 146/1.60 |
| Arctic Cat | 2022 | Riot 8000 146/1.60 w/ATAC |
| Arctic Cat | 2022 | ZR 6000 Limited 137 ES |
| Arctic Cat | 2022 | ZR 6000 RR 137 ES |
| Arctic Cat | 2022 | ZR 8000 Limited 137 ES |
| Arctic Cat | 2022 | ZR 8000 Limited 137 ES w/ATAC |
| Arctic Cat | 2022 | ZR 8000 RR 137 ES |
| Arctic Cat | 2022 | ZR 9000 Thundercat 137 |
| Arctic Cat | 2022 | ZR 9000 Thundercat 137 EPS |
| Arctic Cat | 2022 | ZR 9000 Thundercat 137 EPS w/ATAC |
| Arctic Cat | 2023 | M 600 Alpha One 146 |
| Arctic Cat | 2023 | M 600 Alpha One 154 |
| Arctic Cat | 2023 | M 8000 Hardcore Alpha One 146 |
| Arctic Cat | 2023 | M 8000 Hardcore Alpha One 146 ES |
| Arctic Cat | 2023 | M 8000 Hardcore Alpha One 154 |
| Arctic Cat | 2023 | M 8000 Hardcore Alpha One 154 ES |
| Arctic Cat | 2023 | M 8000 Hardcore Alpha One 165 |
| Arctic Cat | 2023 | M 8000 Hardcore Alpha One 165 ES |
| Arctic Cat | 2023 | M 8000 Mountain Cat Alpha One 146 |
| Arctic Cat | 2023 | M 8000 Mountain Cat Alpha One 146 ES |
| Arctic Cat | 2023 | M 8000 Mountain Cat Alpha One 154 |
| Arctic Cat | 2023 | M 8000 Mountain Cat Alpha One 154 ES |
| Arctic Cat | 2023 | M 8000 Mountain Cat Alpha One 154/3.00 |
| Arctic Cat | 2023 | M 8000 Mountain Cat Alpha One 154/3.00 ES |
| Arctic Cat | 2023 | M 8000 Mountain Cat Alpha One 165 |
| Arctic Cat | 2023 | M 8000 Mountain Cat Alpha One 165 ES |
| Arctic Cat | 2023 | Riot 600 146/1.75 ES |
| Arctic Cat | 2023 | Riot 600 w/Atac 146/1.60 ES |
| Arctic Cat | 2023 | Riot 600 w/Atac 146/1.75 ES |
| Arctic Cat | 2023 | Riot 6000 146/1.60 |
| Arctic Cat | 2023 | Riot 8000 146/1.60 |
| Arctic Cat | 2023 | Riot 8000 146/1.60 w/ATAC |
| Arctic Cat | 2023 | ZR 600 129/1.25 ES |
| Arctic Cat | 2023 | ZR 600 R-XC 137/1.35 |
| Arctic Cat | 2023 | ZR 600 R-XC 137/1.35 ES |
| Arctic Cat | 2023 | ZR 600 W/ Atac 129/1.25 ES |
| Arctic Cat | 2023 | ZR 600 W/ Atac 137/1.25 ES |
| Arctic Cat | 2023 | ZR 6000 137 ES |
| Arctic Cat | 2023 | ZR 6000 R XC 129 ES |
| Arctic Cat | 2023 | ZR 7000 137 |
| Arctic Cat | 2023 | ZR 8000 137 ES |
| Arctic Cat | 2023 | ZR 8000 137 ES w/ATAC |
| Arctic Cat | 2023 | ZR 8000 RR 137 ES |
| Arctic Cat | 2023 | ZR 9000 RR 137 |
| Arctic Cat | 2023 | ZR 9000 Thundercat 137 |
| Arctic Cat | 2023 | ZR 9000 Thundercat 137 EPS w/ATAC |
| Arctic Cat | 2024 | M 600 Alpha One 154 |
| Arctic Cat | 2024 | M 600 Alpha One Sno Pro 146/2.6 |
| Arctic Cat | 2024 | M 600 Alpha One Sno Pro 146/3 |
| Arctic Cat | 2024 | M 600 Alpha One Sno Pro 154/2.6 |
| Arctic Cat | 2024 | M 600 Alpha One Sno Pro 154/3 |
| Arctic Cat | 2024 | M 8000 Hardcore Alpha One 146 |
| Arctic Cat | 2024 | M 8000 Hardcore Alpha One 154 |
| Arctic Cat | 2024 | M 8000 Hardcore Alpha One 165 |
| Arctic Cat | 2024 | M 8000 Mountain Cat Alpha One 146 |
| Arctic Cat | 2024 | M 8000 Mountain Cat Alpha One 154 |
| Arctic Cat | 2024 | M 8000 Mountain Cat Alpha One 154 ES |
| Arctic Cat | 2024 | M 8000 Mountain Cat Alpha One 154/3.00 |
| Arctic Cat | 2024 | M 8000 Mountain Cat Alpha One 165 |
| Arctic Cat | 2024 | Pantera 7000 146 |
| Arctic Cat | 2024 | Riot 600 Snow Pro 146/1.35 |
| Arctic Cat | 2024 | Riot 600 Snow Pro 146/1.75 |
| Arctic Cat | 2024 | Riot 600 w/Atac 146/1.35 ES |
| Arctic Cat | 2024 | Riot 600 w/Atac 146/1.75 ES |
| Arctic Cat | 2024 | Riot 8000 146/1.60 |
| Arctic Cat | 2024 | Riot 8000 146/1.60 w/ATAC |
| Arctic Cat | 2024 | Riot 9000 146/1.60 w/ATAC |
| Arctic Cat | 2024 | ZR 600 129/1.25 ES |
| Arctic Cat | 2024 | ZR 600 137/1.25 |
| Arctic Cat | 2024 | ZR 600 R-XC 137/1.35 |
| Arctic Cat | 2024 | ZR 600 Sno Pro 129/1.25 |
| Arctic Cat | 2024 | ZR 600 Sno Pro 137/1.25 |
| Arctic Cat | 2024 | ZR 600 W/ Atac 129/1.25 ES |
| Arctic Cat | 2024 | ZR 600 W/ Atac 137/1.25 ES |
| Arctic Cat | 2024 | ZR 7000 137 |
| Arctic Cat | 2024 | ZR 8000 RR 137 ES |
| Arctic Cat | 2024 | ZR 9000 RR 137 |
| Arctic Cat | 2024 | ZR 9000 Thundercat 137 |
| Arctic Cat | 2024 | ZR 9000 Thundercat 137 EPS w/ATAC |
| Arctic Cat | 2025 | M 600 Alpha One Sno Pro 146/2.6 |
| Arctic Cat | 2025 | M 600 Alpha One Sno Pro 146/3 |
| Arctic Cat | 2025 | M 600 Alpha One Sno Pro 154/3 |
| Arctic Cat | 2025 | M 858 154/3.0 |
| Arctic Cat | 2025 | M 858 Alpha One 154/3.0 |
| Arctic Cat | 2025 | M 858 Alpha One Sno Pro 154/3.0 |
| Arctic Cat | 2025 | M 858 Mountain Cat 146/2.6 |
| Arctic Cat | 2025 | M 858 Mountain Cat 154/2.6 |
| Arctic Cat | 2025 | M 858 Mountain Cat 154/3.0 |
| Arctic Cat | 2025 | M 858 Mountain Cat 165/3.0 |
| Arctic Cat | 2025 | M 858 Mountain Cat ES 146/2.6 |
| Arctic Cat | 2025 | M 858 Mountain Cat ES 154/2.6 |
| Arctic Cat | 2025 | M 858 Mountain Cat ES 154/3.0 |
| Arctic Cat | 2025 | M 858 Mountain Cat ES 165/3.0 |
| Arctic Cat | 2025 | M 858 Mountain Cat w/ Atac 146/2.6 |
| Arctic Cat | 2025 | M 858 Mountain Cat w/ Atac 154/2.6 |
| Arctic Cat | 2025 | M 858 Mountain Cat w/ Atac 154/3.0 |
| Arctic Cat | 2025 | M 858 Mountain Cat w/ Atac 165/3.0 |
| Arctic Cat | 2025 | M 858 Mountain Cat w/ Atac ES 146/2.6 |
| Arctic Cat | 2025 | M 858 Mountain Cat w/ Atac ES 154/2.6 |
| Arctic Cat | 2025 | M 858 Mountain Cat w/ Atac ES 154/3.0 |
| Arctic Cat | 2025 | M 858 Mountain Cat w/ Atac ES 165/3.0 |
| Arctic Cat | 2025 | M 858 Sno Pro 146/2.6 |
| Arctic Cat | 2025 | M 858 Sno Pro 154/2.6 |
| Arctic Cat | 2025 | M 858 Sno Pro 154/3.0 |
| Arctic Cat | 2025 | M 858 Sno Pro 165/3.0 |
| Arctic Cat | 2025 | M 858 Sno Pro ES 146/2.6 |
| Arctic Cat | 2025 | M 858 Sno Pro ES 154/2.6 |
| Arctic Cat | 2025 | M 858 Sno Pro ES 154/3.0 |
| Arctic Cat | 2025 | M 858 Sno Pro ES 165/3.0 |
| Arctic Cat | 2025 | Pantera 7000 ES |
| Arctic Cat | 2025 | Riot 600 135 ES |
| Arctic Cat | 2025 | Riot 858 Sno Pro ES 146/1.35 |
| Arctic Cat | 2025 | Riot 858 Sno Pro ES 146/1.75 |
| Arctic Cat | 2025 | Riot 858 w/ Atac 146/1.35 |
| Arctic Cat | 2025 | Riot 858 w/ Atac 146/1.75 |
| Arctic Cat | 2025 | Riot 9000 w/ Atac EPS 146/1.35 |
| Arctic Cat | 2025 | ZR 600 137/1.25 |
| Arctic Cat | 2025 | ZR 600 R-XC 137/1.35 |
| Arctic Cat | 2025 | ZR 600 R-XC 137/1.35 ES |
| Arctic Cat | 2025 | ZR 600 Sno Pro 129/1.25 |
| Arctic Cat | 2025 | ZR 600 Sno Pro 137/1.25 |
| Arctic Cat | 2025 | ZR 600 W/ Atac 129/1.25 ES |
| Arctic Cat | 2025 | ZR 600 W/ Atac 137/1.25 ES |
| Arctic Cat | 2025 | ZR 7000 137 |
| Arctic Cat | 2025 | ZR 858 137 ES |
| Arctic Cat | 2025 | ZR 858 R-XC 137 |
| Arctic Cat | 2025 | ZR 858 Sno Pro 137 ES |
| Arctic Cat | 2025 | ZR 858 Sno Pro ES 129 |
| Arctic Cat | 2025 | ZR 858 W/ Atac 129 ES |
| Arctic Cat | 2025 | ZR 858 W/ Atac 137 ES |
| Arctic Cat | 2025 | ZR 9000 RR 137 |
| Arctic Cat | 2025 | ZR 9000 Thundercat 137 EPS w/ATAC |
