Primary Clutch
• Use to control RPM’s via weights
• Use to control engagement via spring
• If hotter than secondary belt slipping more in primary
• If hotter than secondary use softer spring or more weight to add “squeeze” to primary; also accomplished by lessening “squeeze” in secondary
Primary Springs
• Use to control engagement
• Higher numbers = stiffer spring
• Higher first number = higher engagement
• Higher numbers generally = more weight needed
• Higher last number = more “top end” and/or RPM’s
• Too high last number = incomplete shift
• Too low last number = too quick shift
Flyweights
• Use to control RPM’s – more weight = less RPM’s
• Heel (close to pin) weight affects beginning of shift (slow speeds)
• Toe weight affects end of shift (high speeds)
• More heel weight = better low speed (crawling)
• More toe weight = better high speed
Secondary Clutch
• Torque Sensing
• Use to control Backshift
• Up shift = clutch opening = shifting up/out = increasing speed (generally, not always since the clutch is torque sensing)
• Backshift = clutch closing = shifting down = decreasing speed (generally, not always since the clutch is torque sensing)
• If hotter than primary belt slipping more in secondary
Secondary Springs
• Use to control backshift
• Softer spring = more up-shift = more MPH
• Stiffer spring = better backshift
• Stiffer spring keeps clutch in “lower gear” longer
Helix
• Use to control upshift
• Also Torque Sensing
• Main “force” on secondary sheaves; shallower angle = more “side load”
• Shallower angle (smaller number) = faster upshift and slower backshift
/Rizzzo
• Use to control RPM’s via weights
• Use to control engagement via spring
• If hotter than secondary belt slipping more in primary
• If hotter than secondary use softer spring or more weight to add “squeeze” to primary; also accomplished by lessening “squeeze” in secondary
Primary Springs
• Use to control engagement
• Higher numbers = stiffer spring
• Higher first number = higher engagement
• Higher numbers generally = more weight needed
• Higher last number = more “top end” and/or RPM’s
• Too high last number = incomplete shift
• Too low last number = too quick shift
Flyweights
• Use to control RPM’s – more weight = less RPM’s
• Heel (close to pin) weight affects beginning of shift (slow speeds)
• Toe weight affects end of shift (high speeds)
• More heel weight = better low speed (crawling)
• More toe weight = better high speed
Secondary Clutch
• Torque Sensing
• Use to control Backshift
• Up shift = clutch opening = shifting up/out = increasing speed (generally, not always since the clutch is torque sensing)
• Backshift = clutch closing = shifting down = decreasing speed (generally, not always since the clutch is torque sensing)
• If hotter than primary belt slipping more in secondary
Secondary Springs
• Use to control backshift
• Softer spring = more up-shift = more MPH
• Stiffer spring = better backshift
• Stiffer spring keeps clutch in “lower gear” longer
Helix
• Use to control upshift
• Also Torque Sensing
• Main “force” on secondary sheaves; shallower angle = more “side load”
• Shallower angle (smaller number) = faster upshift and slower backshift
/Rizzzo
