Does anyone have or know where to get new cam bolts? I am rebuilding a 1973 cb350 twin and I think (I am out of ideas) that one of my bolts is bent. Long story short, I had Delta Cam regrind my cam, when I got it back and was tightening the sprocket on with the original bolts (to 12 ft/lbs) before I even got to torque the tab on the cam cracked. I checked the sprocket for any issues and didn't see anything. I bought a used cam (Core, sprocket, bolts) off ebay, sent it out to Delta Cams to get reground. When I got it back, I was putting the sprocket on (with I believe my original bolts and sprocket (better condition)) the tab on the cam cracked (I almost cried). So now that I am on my 3rd cam, I am not taking any chances and want to try with fresh bolts a) can someone point me in the right direction, b) has anyone seen that before?
Cam Bolts - This Has Been My Nightmare - Please Help
1 - 17 of 17 Posts
Understood, and I do know that at least. It was the non-shouldered (full thread) bolt that cracked both cams
Either the cam was already fractured or you are very unlucky.
NOS parts on ebay, search for 90081-312-00 and 90085-312-000
I use a 1/4 drive torque wrench set to inch pounds ... so 144 or so inch pounds. If you are using a 3/8 drive torque wrench set to foot pounds you are probably out of range.
I use red loctite on my installs.
NOS parts on ebay, search for 90081-312-00 and 90085-312-000
I use a 1/4 drive torque wrench set to inch pounds ... so 144 or so inch pounds. If you are using a 3/8 drive torque wrench set to foot pounds you are probably out of range.
I use red loctite on my installs.
Good reading ....
www.hondatwins.net
Cam Bolts Torque Test CB/CL/SL350
I just did a Cam Bolts torque test. The CAM BOLTS were used at least twice, total extension length (torque wrench to end of socket) 7 inches, bolts and threads Dry. I have beam and a click type torque wrenchs, they are closely matched. I used the clicker type. Both Bolts felt very solid up to 16...
www.hondatwins.net
Thanks for all the replies and help. good idea using the 1/4" torque and I will look on ebay to try and find some fresh bolts. I talked to a couple engine builders and even megacycle and they didn't like the idea of trying to weld the cam core on the tab. I believe the ownership at delta cam changed over the last year or so
Do you know what the NOS number is for the cam sprocket? I also want to make sure my sprocket is a direct match for my cam
FSM
Joined
·
2,467 Posts
12 ft-lbs? Where did you get this spec? 6mm bolts are only supposed to torque to 6-7 ft-lbs. I have never used a torque wrench on cam sprocket bolts. I use medium strength Loctite and just tighten them down with a 1/4" drive ratchet. Never had any come loose or cracked a tab off.
TOOLS
TOOLS
That was what was in the service manual
yes it is the k5 engine... I always assumed the bike was the 350G supersport but I could be wrong?
I am trying to find the copy online again, I have the printed version on my workbench
1 - 17 of 17 Posts
Join the discussion
Join now to ask and comment!