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View Full Version : whats the hole for?


chucked
06-03-2004, 06:48 PM
Whats the hole in the swing arm bolt for?
deathman53
06-03-2004, 06:54 PM
I don't know, but a good idea would be to put a greease fitting in it and weld the other end shut and drill some small holes where the swingarm bearings ride.
chucked
06-03-2004, 06:57 PM
Originally posted by deathman53
I don't know, but a good idea would be to put a greease fitting in it and weld the other end shut and drill some small holes where the swingarm bearings ride.

that is a good idea!
MichaelS693
06-03-2004, 11:03 PM
cotter pin maybe?
Flo Bee
06-04-2004, 12:07 AM
Haven't seen the hole you're referring to, but I'd assume safety wire.
chucked
06-04-2004, 04:20 AM
Originally posted by MichaelS693
cotter pin maybe?

no its going lengthwise
sickmojave
06-04-2004, 05:11 AM
to make it lighter.:D
diesel-mech
06-04-2004, 10:42 AM
Im pretty sure it is to let the bolt stretch. When you torque a bolt it has to stretch so it stays tight. the bolt is so heavy that if it were solid you would have to torque it to like 250ft.lbs. to make it stretch, most bolts use a tapered shaft but you can't do that when the bearings ride on it so they hollow the bolt out. thus allowing the bolt to stretch at a much lower torque spec.:cool:
khen
06-04-2004, 12:39 PM
It could also be used to help dissipate heat from the bearings. This would help prevent it from seizing. Just a thought..
deathman53
06-04-2004, 03:16 PM
I have that done in my atc 250r, when I first started tearing the bike apart it was very nice to know that I wouldn't have a problem with the swingarm bolt, now I have a another atc with a stuck bolt and not sure what I'm gonna do with it.
INFANTRY RACING
06-05-2004, 12:37 PM
Originally posted by deathman53
I don't know, but a good idea would be to put a greease fitting in it and weld the other end shut and drill some small holes where the swingarm bearings ride. the actual bearings ride on spacers though. all you will be doing is greasing between the bolt and space. your better off doing it right.
chucked
06-05-2004, 12:41 PM
Originally posted by INFANTRY RACING
the actual bearings ride on spacers though. all you will be doing is greasing between the bolt and space. your better off doing it right. yea thats right,
deathman53
06-05-2004, 07:09 PM
however when the bolt seizes in the frame, the collars rust to the bolt and most times the bearings don't. Makes it alot easier to remove the bolt later on