79f axle holder stud broken

[mason79]

okay i checked and i actually got some good answers,


yes i snapped the front stud, and i got it out.

so can i just stick a bolt in it?

some other thread, says i can put some allen cap screws, but will it allow for proper tightening?

[xschop]

YES

I have done the same thing. even installed stainless allen heads. m8x1.25 IIRC....CHOP

[Dragonrider]

Make sure they are the grade 8 or equivilent. Not all bolts are created equal...and you need the good ones down there.

[skids]

With my 4-1's, I find that bolts are better than studs in at least one location because of clearance with head pipes.

[mason79]

Originally posted by Dragonrider
Make sure they are the grade 8 or equivilent. Not all bolts are created equal...and you need the good ones down there.

i'm glad they weren't so good to begin with otherwise i prolly would have busted the fork

torque wrench wouldn't click.

[skids]

I am sorry. I misread/misintrepreted the stud location. Disregard my post!

Originally posted by skids
With my 4-1's, I find that bolts are better than studs in at least one location because of clearance with head pipes.

[HobbyMan]

So those are actually suds down there? I never really thought about them, though I have done my share of fork rebuilding.

[mason79]

okay i can't find a grade 8 or even grade 5 bolt

8mm x 1.25 pitch x 40mm long

to rplace my broken stud,

anyone know what grade the stud was? if grade 8 would be over torqued then it would strip the fork legs instead of breaking, right?.

is a allen cap srew a grade 8.8? will that work? and can i place enough torque on that fastener with a teenie allen wrench to spec?

or is grade 10.9 better whatever that means,

any suggestions would be great.

[John]

With the low torque applied to the fastener, I wouldn't really worry about the strength of a bolt. The torque is only 14.5 ft.lbs. You can generate that kind of torque with just your wrist. That's about the same torque a spak plug requires, and that is for a nut on a steel stud. When you start screwing the fastener directly into the aluminum, you can easily strip the threads, so I would recommend replacing the broken stud with another stud. After all, what is the torque on the fasteners holding the covers on the engine? 7.7 ft.lbs, that's all. That may not be enough to properly clamp the axle in place securely.