Topic: CB400F front and rear sprocket torque settings

[Richard Branston-Davis]

Hi i have just got a new chain and sprocket set from Davis Silver spares and i don't have a work shop manual!! However i can still do the job without the manual but what i do need is the torque settings for the front and rear sprockets. My bike is a 1975 Honda CB400F
 Many thanks Richard 

[HondanutRider]

The manual doesn't seem to list a setting for the front sprocket, as I believe its held on with splines and a retaining tab that uses a couple of small bolts that just hold it in place and prevents the sprocket from coming off the splines.

For the "Final driven sprocket" they list the torque settings as "400-500 km-cm" or "29.0-336.2 lbs-ft".

[Richard Branston-Davis]

Thanks for that mate, just the job now i can crack on 

[Bodi]

The front sprocket has the locking ring with two 6mm screws. Since these thread into the hardened sprocket steel, you can do them up pretty tight but don't overdo it. I use red LocTite on these.
The rear sprocket studs do get torqued down tight, the studs will pull out of the cush rubbers along with the sprocket - you don't loosen the nuts with the sprocket in place and once the studs break loose it's impossible to tighten the nuts with them in there (and tightening will probably break the crud and corrosion bond). Once the sprocket and studs are taken off the wheel hub, there are flats on the studs to get a wrench onto. Possibly (some do, maybe not Honda or not a 400?) the flats on the studs sit in a groove or hit a raised ring, keeping them from turning. The rear sprocket itself is held on the hub by a large c-clip.

[HondanutRider]

I suggest you try getting a copy of the Shop Manual to illustrate and explain the process for removing and replacing the sprocket.  You should be able to download a free copy from this site or a link that it contains.

[Richard Branston-Davis]

Thanks for all the tips got it all sorted, as for the circlip it bloody huge got it off but need bigger circlip pliers  and also found the manual as well on this site brilliant