how do i remove head studs?

Discussion in '2-Stroke Engines' started by happyjourney, Nov 28, 2011.

  1. happyjourney

    happyjourney Member

    the tactic of putting two nuts on with one wrench holding the top nut on to keep pressure to lock the bottom nut into its position of sitting at the base of where the treading ends on these oem bolts as the bottom wrench attached to the bottom nut turns counter clockwise to loosen the bolt might not work i'm thinking. i'm wondering if there is a better way?

    as well my question might be are my head studs 8mm? I've got a 80/66 bgf package. in al.fishermans breakdown of a china HT engine photo album he has the quote "Depending on model...6mm (same as both the intake and exhaust stud sizes) or 8mm." which means to me that if i don't have the same size studs in my exhaust and intake that i have 8mm head studs. My heads studs are clearly larger than the intake and exhaust. does anybody know if bgf 66/80cc engines have 1.0 or 1.25 thread pitch so i can go ahead and buy new ones from sick bike parts. i haven't removed them to put them side by side with the exhaust and intake studs to see if there the same which would mean they are 1.0 according to sick bike parts. :dunce:
    Last edited by a moderator: Dec 15, 2015

  2. Al.Fisherman

    Al.Fisherman Active Member

  3. Mozenrath

    Mozenrath New Member

    Perhaps using a socket wrench would make it easier?
  4. HeadSmess

    HeadSmess Well-Known Member

    the "double nut" method of removing/installing studs is just about the ONLY way of doing it that works :rolleyes:

    stop thinking for yourself if you come up with daft ideas like "it mayn't work"

  5. Al.Fisherman

    Al.Fisherman Active Member

    There are a number of stud removal tools on the market. Here are a few.,or.r_gc.r_pw.,cf.osb&biw=1076&bih=434&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=i43bTtGcN8u_tge38bGCAg
    But with the very few times that the studs are to be removed and the expense of the tool, I don't think they are worth it. Once I replace my studs, and loctite (red) them in, the only way of removal is to use heat. Without heat they won't budge.
    Last edited: Dec 4, 2011
  6. Old Bob

    Old Bob Member

    The double nut method is free and won't gouge the studs. All those stud removers with the exception of the collet style will leave marks on the studs.
  7. motorpsycho

    motorpsycho Active Member

    but of you're removing the stock studs to replace them with better, stronger studs, what difference does it make if the old studs get gouged?
  8. Barnfresh

    Barnfresh Member

    That's what I was thinking, heck use vise grips on them why would you care. Just make sure you don't get any metal shavings in the bottom end.
    If all you're doing is trying to compare threads just take a nut off the intake or exhaust and try screwing it on the cylinder/head stud.