Diaphragm Spring
For '98 and up Big Twin

Magic spring

  • Highly recommended this spring has initial pressure of 280 lbs and progressively reduce pressure due to 210 lbs as lever is pulled. (only on 1998 to 2005 BT models)
 Parts#  Engine size w/VP  Retail
AM-007-280 up to 88" (1450cc) w/VP67T
up to 95" (1550cc) w/VP83S
up to 110" (1800cc) w/VP83T
up to 124" (2000cc) w/VP92T
$55.00 Buy this item


Hevy duty spring

 Parts#  Spring pressure  Retail
AM-007-340 340 lbs $35.00 Buy this item
AM-007-380 380 lbs $45.00 Buy this item
AM-007-480 480 lbs $35.00 Buy this item

For VP-Evo, VP-Sport and Rivera-TPP
(all use the same style spring)


  • Several clutch spring pressure available for specific engine size.
  • Changing initial spring pressure means changing clutch pull and pressure at clutch
       Softer ------ For lighter clutch pull.
       Stiffer ------- For higher clutch pressure.
*Using softer spring the our recommendation may cause clutch slippage.
 Parts#  Pressure  Engine size w/VP  Retail
AM-006-150 150 lbs 883cc $50.00 Buy this item
AM-006-190 190 lbs up to 80" (1340cc) $50.00 Buy this item
AM-006-240 240 lbs up to 96" (1560cc) $50.00 Buy this item
AM-006-320 320 lbs (STD) up to 124" (2000cc) $35.00 Buy this item
AM-006-400 400 lbs up to 131" (2140cc) $35.00 Buy this item
AM-006-480 480 lbs up to 140" (2280cc) $25.00 Buy this item