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Thread: big valve questions

  1. #1
    Join Date
    Mar 2009
    Location
    cherry valley
    Posts
    956

    big valve questions

    hey guys
    ive bought some ferrea valves stock intake and plus 1mm ex
    the ex seats can just be machined up or do i need to replace seats?
    also do i need heavier spring rate or will new oem get the job done
    running hc s2 cam

  2. #2
    Join Date
    Apr 2008
    Location
    Riverside CA
    Posts
    589
    not sure if the seats need replacing or not but you should be fine on spring rates with that cam.
    2005 trx450-houser arms/PEP, 06 swinger, dc-6 linkage, lsr axle, protaper, houser stem, goldspeed wheels and tires, pro armor skids/nerfs/bumper,k&n, 43.5mm FCR, Kohashigawa Exhaust, +1 Ti Intake Valves, +2 Ti Exhaust Valves, CV4 Valve Springs, webcam, CT Racing Head, CB Seats, je 13.8:1, crf ignition, fluidyne radiator, hinson, asv, DID, Supersprox, ccp damper, Twist Throttle.

  3. #3
    Join Date
    Mar 2003
    Location
    Oklahoma
    Posts
    526
    the seats can be machined they do not need to be replaced the ferra valves are heavier than OEM so if you are a rever stiffer springs would be a good idea.

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