/ Register

  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Cutting original cams?

Discussion in 'Yamaha 250cc In-Line 4's' started by graham, Oct 28, 2013.

  1. graham

    graham Member

    Messages:
    24
    Likes Received:
    3
    Trophy Points:
    13
    Joined:
    Aug 26, 2013
    Gender:
    Male
    Location:
    cape town south africa
    My Bike:
    fzr 250
    hi guys

    im modifying 1 of my spare heads and want to cut the cams, im wondering if anyone has done it and could share some light on it.
     
    graham, Oct 28, 2013
    #1
  2. risky

    risky risky

    Messages:
    4,555
    Likes Received:
    1,177
    Trophy Points:
    923
    Joined:
    Nov 4, 2012
    Gender:
    Male
    Occupation:
    risky by name AND actions
    Location:
    newcastle,australia
    My Bike:
    honda ca77, megelli x2,fzr yamaha x 5 ,maxim,cb750.cb600 hornet,zxr250,marusho magnum electra.
    i consider this a professional job as much science is involved.
     
    risky, Oct 28, 2013
    #2
  3. Phil

    Phil Senior Member Contributing Member

    Messages:
    3,613
    Likes Received:
    1,549
    Trophy Points:
    923
    Joined:
    Aug 8, 2010
    Gender:
    Male
    Occupation:
    M C E
    Location:
    Sunshine Coast Qld
    Home Page:
    My Bike:
    Suzuki GT250X7 Kawasaki ZZR600
    Have to agree with risky, would only consider this type of work to be performed by pro's.
     
    Phil, Oct 28, 2013
    #3
  4. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

    Messages:
    3,237
    Likes Received:
    1,423
    Trophy Points:
    918
    Joined:
    Oct 1, 2013
    Gender:
    Male
    Location:
    Narrabeen, NSW Australia
    My Bike:
    Yamaha FZR250 3LN1
    Normally cutting original cams would be done to change the lift profiles &/or durations, on something that already revs to ~18K, that's pretty much already been done from the factory.

    If you wanted to lessen the tune, get some Zeal cams
     
    ruckusman, Oct 28, 2013
    #4
  5. graham

    graham Member

    Messages:
    24
    Likes Received:
    3
    Trophy Points:
    13
    Joined:
    Aug 26, 2013
    Gender:
    Male
    Location:
    cape town south africa
    My Bike:
    fzr 250
    the cams are going to the engineers but what i wana know is, what drgree they can cut it,what valve clearances will i have to use, ect?
     
    graham, Oct 30, 2013
    #5
  6. risky

    risky risky

    Messages:
    4,555
    Likes Received:
    1,177
    Trophy Points:
    923
    Joined:
    Nov 4, 2012
    Gender:
    Male
    Occupation:
    risky by name AND actions
    Location:
    newcastle,australia
    My Bike:
    honda ca77, megelli x2,fzr yamaha x 5 ,maxim,cb750.cb600 hornet,zxr250,marusho magnum electra.
    depends on what you want to use it for... road or race. the cams are pretty savage stock.valve clearance the cam grinder will tell you. if cams tooooo savage open up the clearance.
     
    risky, Oct 30, 2013
    #6

Share This Page