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  STM Yamaha YZ/WR 450F Slipper Clutch
STM Yamaha YZ/WR 450F Slipper Clutch


 
List Price: $1,205.00
Our Price: $1,166.00
Savings: $39.00
Status: Current

Product Code: FYA-X030
Qty:

Description
 
Required reading for a life of backing it in effectively without wheel hop and slippage coming out of hot corners.  STM Yamaha YZ/WR 450F Slipper Clutch Material: aluminum alloys and special steel Primary spring: 90 mm Evoluzione diaphragm spring code 003MG019 Secondary spring: 85 mm Evoluzione spring code 0F3SR540B140006 Basket: original Yamaha (not included) Features: slipper system - device to control the opening - Forced Lubrication System 1 Compatible disc pack: original Yamaha (not included) Tools: pressure plate mounting tool code 002AMH001 (recommended) Note: when choosing the primary spring keep in mind that the greater the spring tension, the greater the pressure on the disc pack and the smaller the slipping in acceleration. When choosing the secondary spring remember that the greater the spring tension, the greater the engine brake in deceleration.
Features
  • STM Slipper Clutches for OFF ROAD BIKES
  • All STM Slipper Clutches utilize 'Ball & Ramp' actuation for smooth slipper clutch operation in opening and closing conditions. The Ball & Ramp actuation is the foundation from which all STM clutch platforms are built on. Additionally, all STM Slipper Clutches come with Primary & Secondary springs that have been calibrated for the specific application the clutch is intended for. The weight of both springs chosen by the STM Factory Technicians that come standard with each clutch should be suitable for 90% of riders. One of the outstanding features of STM Slipper Clutches is that they all offer a wide range of adjustability to suit any rider's needs. Both Primary & Secondary springs (weighted in Kilograms) are offered in 10kg increments and sold individually. Riders & engine builders can purchase additional springs of varying weight to find the perfect combination that suits their needs. The STM Off Road Wet Slipper Clutch is specifically designed for wet clutch applications for 250cc & 450cc four-stroke bikes. The clutch uses the cornerstone of STM technology, the 'Ball & Ramp' actuation for smooth slipper clutch operation along with another STM exclusive .. 'FLS', our Forced Lubrication System. The STM 'FLS' - Forced Lubrication System increases the amount of engine oil flowing through the wet clutch, which leads to cooler running temperatures and cleaner conditions thus increasing the performance and longevity of the clutch components. In addition, it uses a 125mm Diaphragm Primary Spring and an 85mm Diaphragm Secondary Spring. By using diaphragm springs in both the primary and secondary .. the Evolution Wet Slipper Clutch offers superior adjustability to suit any riding style and engine modification. The primary spring controls the pressure on the clutch pack during lock up. STM 125mm diaphragm primary springs are weighted in Kilograms and offered in 10Kg increments. There are 13 different weights to choose from (sold individually). Through the use of varying weights, the engine builder can adjust the amount of pressure on the clutch pack to compensate for any engine modifications and subsequent increases in horsepower. The secondary spring is what controls the amount of engine brake. The lighter the secondary spring, the less engine brake; the heavier the secondary spring, the more engine brake. The 85mm diaphragm secondary springs are weighted in Kilograms and offered in 10Kg increments. There are 6 different weights to choose from (sold individually). Through the use of varying weights, the rider can adjust the amount of engine brake desired to fit their individual riding style.

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