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Swing Arm Bolt Torque

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dkwilfert
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Joined: Wed May 06, 2009 4:47 pm
Location: Knoxville, TN

Swing Arm Bolt Torque

Post by dkwilfert » Wed Aug 05, 2009 3:10 pm

Can anyone tell me how tight the main bolt for the swing arm of a CB-77 should be? Is there a torque spec or is it like a bearing where you tighten till there is drag and then back off till drag is gone? If the latter, how do you keep the nut from working loose over time?
Thanks in advance for the help.

By "main bolt" I mean the one the swing arm pivots on.

FAST FRED
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TORQUE SPEC

Post by FAST FRED » Wed Aug 05, 2009 10:16 pm

MY 250-305 CLYMER MANUAL LISTS THE TORQUE FOR THE REAR FORK PIVOT BOLT AT 54.97 FOOT POUNDS. THE LISTING IS IN THE CL72/77 SECTION BUT I CAN'T THINK WHY A CB WOULD BE ANY DIFFERENT.

FAST FRED
65 CL77
66 CL77
76 CB550FKR
76 CT90

dkwilfert
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Posts: 26
Joined: Wed May 06, 2009 4:47 pm
Location: Knoxville, TN

Re: TORQUE SPEC

Post by dkwilfert » Thu Aug 06, 2009 4:12 am

FAST FRED wrote:MY 250-305 CLYMER MANUAL LISTS THE TORQUE FOR THE REAR FORK PIVOT BOLT AT 54.97 FOOT POUNDS. THE LISTING IS IN THE CL72/77 SECTION BUT I CAN'T THINK WHY A CB WOULD BE ANY DIFFERENT.

FAST FRED
Thanks Fast Fred, and looking forward to the screws you have in the mail to me.

cknight
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Location: Daytona Beach, FL

Post by cknight » Thu Aug 06, 2009 5:33 pm

I would certainly just snug it for minimal drag If you tighten it as noted, it will put the swingarm (rear fork) in a bind. Try torquing the nut with the shocks off, and you'll see. The nut is a crimp type, and should not vibrate loose. If you are concerned with side play between the swingarm and the thrust surfaces on the frame, make shims out of industrial plastic shim material to reduce the clearance. Regards, Chase

dkwilfert
honda305.com Member
Posts: 26
Joined: Wed May 06, 2009 4:47 pm
Location: Knoxville, TN

Post by dkwilfert » Fri Aug 07, 2009 4:26 am

cknight wrote:I would certainly just snug it for minimal drag If you tighten it as noted, it will put the swingarm (rear fork) in a bind. Try torquing the nut with the shocks off, and you'll see. The nut is a crimp type, and should not vibrate loose. If you are concerned with side play between the swingarm and the thrust surfaces on the frame, make shims out of industrial plastic shim material to reduce the clearance. Regards, Chase
I know what you are talking about, the shocks are off right now, that is why I raised the question as either a torque or a tighten/backoff method. The nut on my long swing arm bolt is NOT the crimp type, but I picked up a jam nut yesterday so I have the option of setting the first nut and using the jam nut to lock it in place.

OK, that's one vote for torque and one for tighten/backoff. Anyone else have a thought. Had a friend check the "Official Honda Service Manual" and it is no help at all.

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