Barn of Parts Sled Salvage LLC

Multi Rate Big Boy Spring for Mono Shock Suspension
Available for:
06-15 Apex
05 RX-1
06-07 Rage
06-07 Attak
08-15 Vector LTX
08-10 Apex LTX
The big boy springs Yamaha offers for the mono shocks are a single rate. Most riders install the big boy springs to prevent the skid from bottoming on the large bumps. The trade off by doing this is that a single rate spring will harshen the ride quality on smaller bumps. Our solution to this is the multi rate spring, which is a progressive rate spring. These springs are wound so they have two rates in the same spring. These springs allow a rider to have bottoming resistance without compromising the small bump ride quality.
The springs are a direct replacement for the factory spring. The shock body does not need to be machined or altered to accept our multi rate springs.
We basically make these springs to order based on the customer preferences. As a std we typically start the spring with the stock spring rate and then transition to one of the heavier big boy rates. For example an apex 121 stock spring rate is 4.5 kg. If rider is happy with ride quality on small studder bumps but bottoms hard on the occasional wash out we may opt to supply a 4.5 to 6.0 spring.
If interested in purchasing one of these springs contact us.
Sell Price is $175 for any rate combo. They can be ordered in the online store.
Yamaha 4 Stroke Snowmobile Specialists
Yamaha 4 Stroke Snowmobile Specialists
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- Aftermarket Goodies 1/13/21
- Whole Sled for Sale 1/13/21
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- Front Tunnel Saver NEW
- Driveshaft Saver New
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- EXUP Cable Delete NEW
- Chain Tensioner Bolt NEW
- Single Shot Relay Rods NEW
- GPS Mounting Plate NEW
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- Build Your Own Linq
- Center Shock Cross Shaft
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- Yamaha Single Keel Ski
- Solid Axle 4 Wheel Kit
- Camso 7" Wide Skis
- Torsion Block Relocate
- Coolant Hose Saver
- Intercooler Guard
- Upper Cross Shaft Saver
- Sidewinder Radiator Kit
- 4th Wheel Kits
- Belly Pan Protector
- Copper Exhaust Gaskets/Donuts
- Belt Adjust/Change Tool
- Chaincase Protector
- Seat Screw
- Curve Skis
- Mono Shock Cable Delete
- Japan Throttle Kit
- Skid Plates
- Viper Fuse Box Relocate Kit
- FX Nytro Dual Fan Kit
- Nytro Steering Relocate
- Torsion Spring Adjusters
- 13mm Sway Bars
- Oil Tank Saver
- Bulkhead Saver Kits
- Bulkhead Repair Kit
- Excell "X" Idler Wheels
- Snow Flap Plate
- Soft Start Clutching
- Mirror Kits
- Extrovert Track Drivers
- Rail Savers for 136" Mono
- Engine Saver I
- Headlight Repair kit
- Suspension Mounting Plates
- Multi Rate Big Boy Spring
- Home
- Contact Us
- About
- Used Part Inventory
- Kimpex & WPS Catalogs
- How to Order Parts
- Online Store
- Blog...updated 1/13/21
- Aftermarket Goodies 1/13/21
- Whole Sled for Sale 1/13/21
- Engine Inventory 9/28/20
- Front Tunnel Saver NEW
- Driveshaft Saver New
- DMC Top Gear NEW
- Rider Alert Device (RAD)
- EXUP Cable Delete NEW
- Chain Tensioner Bolt NEW
- Single Shot Relay Rods NEW
- GPS Mounting Plate NEW
- Oil Tank Gasket
- MPS - Power Steering
- Seat Concepts/WRP Seats
- Ice Scratchers & Mounts
- Key Switch Relocate
- Procross Cargo Mount
- Rear Tunnel Savers
- Fuel Caddy & Cargo
- Build Your Own Linq
- Center Shock Cross Shaft
- Snow Tracker Skags
- No Freeze Relay
- Yamaha Single Keel Ski
- Solid Axle 4 Wheel Kit
- Camso 7" Wide Skis
- Torsion Block Relocate
- Coolant Hose Saver
- Intercooler Guard
- Upper Cross Shaft Saver
- Sidewinder Radiator Kit
- 4th Wheel Kits
- Belly Pan Protector
- Copper Exhaust Gaskets/Donuts
- Belt Adjust/Change Tool
- Chaincase Protector
- Seat Screw
- Curve Skis
- Mono Shock Cable Delete
- Japan Throttle Kit
- Skid Plates
- Viper Fuse Box Relocate Kit
- FX Nytro Dual Fan Kit
- Nytro Steering Relocate
- Torsion Spring Adjusters
- 13mm Sway Bars
- Oil Tank Saver
- Bulkhead Saver Kits
- Bulkhead Repair Kit
- Excell "X" Idler Wheels
- Snow Flap Plate
- Soft Start Clutching
- Mirror Kits
- Extrovert Track Drivers
- Rail Savers for 136" Mono
- Engine Saver I
- Headlight Repair kit
- Suspension Mounting Plates
- Multi Rate Big Boy Spring