{"product_id":"len-performance-rear-track-shock-arctic-cat-m-series-mountain-cat-54-11001sr","title":"Len Performance Rear Track Shock, Arctic Cat M-Series \/ Mountain Cat \/ XF High Country \/ Yamaha Viper MTX 2012–2025 (54-11001SR)","description":"\u003cp\u003eLen Performance LS4-11001R rebuildable rear track shock for the rear suspension on Arctic Cat M 800 \/ M 1100 (2012–2013), M 6000 \/ 7000 \/ 8000 \/ 9000 including Mountain Cat, King Cat and Hardcore (2014–2019, Mountain Cat ES 153 to 2021), XF 6000 \/ 7000 \/ 8000 \/ 9000 High Country, Cross Country and CrossTour 141 (2014–2019), and the Yamaha SR Viper MTX (2015–2017) and Sidewinder MTX LE (2019, 2025). It replaces the factory rear track shock with a coil-over reservoir shock. At $611.95 each, it is A2D's value pick for a rebuildable, adjustable reservoir rear track shock: clicker adjustment, a reservoir and a serviceable design without the cost of a race-level shock.\u003c\/p\u003e\u003cp\u003eThe rear track shock sets how the skid handles deep-snow re-entries, drops and bottoming with gear on the tunnel. This is a coil-over unit with its own powder-coated spring, 5-click compression and 5-click rebound adjustment, and a threaded body with locking preload rings so the rear can be set for rider weight and snow conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment.\u003c\/strong\u003e Sold each. Pairs with the Len Performance 54-11001SF front track shock for a complete rear suspension (Len Performance kit LS4-11001K; confirm kit contents with us, as Len's kit page currently lists the ZR kit's parts). Matching ski shock: 54-11001S. Chassis: Arctic Cat ProClimb (M-series and XF High Country) and the Yamaha Viper \/ Sidewinder MTX built on it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment list\u003c\/strong\u003e (Len Performance year\/model lookup)\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eM-series:\u003c\/strong\u003e 2012-2013 M 1100 153; 2012-2013 M 1100 Turbo 153; 2016 M 6000 141; 2015-2016 M 6000 153; 2016 M 6000 ES 141; 2015-2016 M 6000 ES 153; 2016 M 6000 LTD 153; 2016 M 6000 LTD ES 153; 2018 M 6000 SE 141; 2018 M 6000 SE 153; 2017 M 6000 SE ES 141; 2017 M 6000 SE ES 153; 2015 M 6000 Sno Pro; 2016 M 6000 Sno Pro 141; 2014-2017 M 6000 Sno Pro 153; 2016 M 6000 Sno Pro ES 141; 2016-2017 M 6000 Sno Pro ES 153; 2016 M 7000 LTD 153; 2016 M 7000 LTD 162; 2015-2016 M 7000 Sno Pro; 2016 M 7000 Sno Pro 153; 2015-2016 M 7000 Sno Pro 162; 2012-2013 M 800 153; 2014-2015 M 8000 153; 2015 M 8000 Kincaid LTD 153; 2016 M 8000 LTD; 2016-2017 M 8000 LTD 153; 2016-2017 M 8000 LTD 162; 2016-2017 M 8000 LTD ES 153; 2016-2017 M 8000 LTD ES 162; 2015 M 8000 McClure LTD 153; 2017-2019 M 8000 Mountain Cat 153; 2017 M 8000 Mountain Cat 162; 2017 M 8000 Mountain Cat ES 153; 2017-2019 M 8000 Mountain Cat ES 162; 2016-2018 M 8000 SE 153; 2017-2018 M 8000 SE ES 153; 2016 M 8000 Sno Pro 141; 2014-2017 M 8000 Sno Pro 153; 2014-2017 M 8000 Sno Pro 162; 2016-2017 M 8000 Sno Pro ES 141; 2016-2019 M 8000 Sno Pro ES 153; 2016-2019 M 8000 Sno Pro ES 162; 2014-2016 M 8000 Sno Pro LTD 153; 2014-2015 M 8000 Sno Pro LTD 162; 2014-2015 M 8000 Sno Pro LTD ES 153; 2014-2015 M 8000 Sno Pro LTD ES 162; 2014 M 9000 153; 2014 M 9000 HCR 162; 2017-2019 M 9000 King Cat 162; 2014-2016 M 9000 Sno Pro 162; 2014-2016 M 9000 Sno Pro LTD 162\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eXF:\u003c\/strong\u003e 2014-2015 XF 6000 Crosscountry 141; 2015 XF 6000 Crosstour 141; 2016-2017 XF 6000 High Country 141; 2015 XF 6000 High Country 141 Sno Pro; 2018-2019 XF 6000 High Country ES 141; 2015 XF 7000 Crosscountry 141; 2015 XF 7000 Crosstour 141; 2016 XF 7000 High Country 141; 2015 XF 7000 High Country 141 Sno Pro; 2014-2015 XF 8000 Crosscountry LTD 141; 2015 XF 8000 Crosscountry Sno Pro 141; 2014-2015 XF 8000 Crosstour 141; 2015-2019 XF 8000 High Country 141 Sno Pro; 2015 XF 8000 High Country LTD 141; 2015 XF 9000 Crosscountry LTD 141; 2014-2015 XF 9000 Crosstour 141; 2015 XF 9000 High Country LTD 141\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYamaha:\u003c\/strong\u003e 2018-2019 Sidewinder MTX LE; 2025 Sidewinder MTX LE; 2015-2017 SR Viper MTX 153; 2015-2017 SR Viper MTX LE 162; 2015-2017 SR Viper MTX SE 153; 2015-2017 SR Viper MTX SE 162\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e5-click compression adjustment, tool-free.\u003c\/li\u003e\n\u003cli\u003e5-click rebound adjustment.\u003c\/li\u003e\n\u003cli\u003eAluminum reservoir shock: the remote-style reservoir keeps oil temperature down and damping consistent on long pulls.\u003c\/li\u003e\n\u003cli\u003eFully rebuildable, serviceable shock. Len Performance rebuild kits and replacement parts are available.\u003c\/li\u003e\n\u003cli\u003eHardened chromoly shaft for strength and seal life.\u003c\/li\u003e\n\u003cli\u003eForged aluminum eyelet heads with premium steel and NBR bushings.\u003c\/li\u003e\n\u003cli\u003ePowder-coated spring resists corrosion and holds rate in cold, wet conditions.\u003c\/li\u003e\n\u003cli\u003eThreaded shock body with anodized dual-ring locking preload adjusters: set sag once and it stays set.\u003c\/li\u003e\n\u003cli\u003eSold each.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e54-11001SR (Len Performance LS4-11001R)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOEM part number replaced\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3704-198 (per distributor listings)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShock location\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRear track shock (rear suspension)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChassis \/ platform\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eArctic Cat ProClimb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAdjustments\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCompression (5) and rebound (5), plus threaded spring preload\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength, extended\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e410 mm \/ 16.15 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength, compressed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e277 mm \/ 10.91 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStroke\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e133 mm \/ 5.24 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpring\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePowder-coated coil spring included, 63 mm \/ 2.49 in diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTop eyelet\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8 mm ID x 25 mm wide (0.32 in x 0.99 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBottom eyelet\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8 mm ID x 25.4 mm wide (0.32 in x 1 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6.15 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncludes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOne shock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRebuild kit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLen Performance rebuild kits available; call to confirm the kit number for this shock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSold\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEach\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eOrdering and installation.\u003c\/strong\u003e Sold each. Ships from stock at our Anchorage shop, or from our distributor's Boise, Idaho warehouse when not on the shelf. In-store pickup is available at checkout. Installation and shock setup are available at A2D Motorsports; call (907) 306-3062 to schedule. Len Performance rebuild kits are available, so the shock can be serviced or re-valved rather than replaced.\u003c\/p\u003e","brand":"Len Performance","offers":[{"title":"Default Title","offer_id":50446065205493,"sku":"54-11001SR","price":611.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0267\/9029\/files\/len-54-11001SR.jpg?v=1790126130","url":"https:\/\/a2dmotorsports.net\/products\/len-performance-rear-track-shock-arctic-cat-m-series-mountain-cat-54-11001sr","provider":"Shop A2D Motorsports ","version":"1.0","type":"link"}