replacing all studs/ bolts on boygofast 80 cc

Discussion in '2-Stroke Engines' started by rumme, Jun 16, 2008.

  1. rumme

    rumme Member

    does anyone know the correct lengths/ sizes for all the external studs/nuts/ bolts on this engine and what gauge to go with so they wont strip/ break?

    I have a lowes near me and am hoping they can supply all the hardware.
     

  2. Marktur

    Marktur Member

    OH, when you find out the list of items, please share...I'll be right behind you on my way to Lowes myself! :)
     
  3. eljefino

    eljefino Member

    Get the longest 6mm bolts you can find that are threaded all the way up to the head, so you can use internal nuts to cinch down once the bolts are driven all the way in. Think they're 55mm long. Come in packs of four, grade 8.8, for like $1.20... perfect for the motor mounts!

    They're long enough for slightly oversize frames too.
     
  4. As far as the bolts you need to get assorted sizes
    4) 4mm for the mag cover
    The most popular size is 6mm for Clutch cover, Sprocket cover, Cases
    Intake and exhaust 6mm threaded rod and possible head studs depending on engine. I have a completly different engin than most members. I have a Grubee 48cc Spitfire Roundhead, so lengths vary, but having an assortment is always a good thing. You can start with 1/2 doz of each lenghts 25, 35, 50, 75mm should be the longest you would need except for maybe the rear mount. Hope this helps.....
    I would also pick up some 6mm washers, lockwasher, and nylock nuts. And some Red Loctite........
     
  5. Vfire77

    Vfire77 New Member

    I have the 49cc engine and one of my bolts broke, I haven't looked too closely yet but I am still riding it and it seems fine. Does the 49cc take the same 6mm bolts? And can you saw them off after you have screwed them in?
     
  6. I did all mine in allen head bolts. So any that were too long I just ground down before installing...
     
  7. Vfire77

    Vfire77 New Member

    So I could cut them off from the end that goes into the engine then, if I measure to the length I have the old bolts. Then I could use the allen heads to screw it into the motor.
     
Loading...