honda305 Home honda305 Auctions honda305 Gallery honda305 Forum


honda305.com Forum

Login
□ Search
□ FAQ 
□ 
Vintage Honda Owners,
Restorers, Riders and
Admirers

Camshaft removals

Post Reply
jnbmoore
honda305.com Member
Posts: 16
Joined: Thu Oct 26, 2017 8:00 pm
Location: Ohio

Camshaft removals

Post by jnbmoore » Mon Sep 03, 2018 6:38 pm

Once again, I turn to the experts on how to solve my problem of removing the right camshaft. Left side came out after some aggressive persuasion. It seemed like the splined end of the shaft was "stuck" in the camshaft sprocket. Now the right one won't let go. What I can't figure out is the purpose of the camshaft locking bolt. Does it lock the right camshaft to the sprocket? I have the nut loose but tapping on the treaded end results only in the whole camshaft assembly moving in the head bearing bores. How is the camshaft separated from the sprocket?

mike in idaho
honda305.com Member
Posts: 411
Joined: Sun Jan 29, 2012 9:18 pm
Location: orofino, idaho

Post by mike in idaho » Mon Sep 03, 2018 8:24 pm

The camshaft locking bolt has a tapered head that expands the id of the camshaft a few thousandths to grip the center. Loosen the nut on the bolt and tap(lightly) on the end of it to release it from the taper. I unscrew the nut until it is flush with the end of the bolt and tap it with an eight ounce hammer.
'65 YG1
'65 CB160
'66 CL160
'66 CL77
'78 XS650
'79 GL1000
'69 T100R
'68 TR6
'69 T120
'72 750 Commando
my company car is a Kenworth

DJM
honda305.com Member
Posts: 553
Joined: Thu Oct 09, 2003 1:54 pm
Location: Chesterfield UK

Camshaft removal.

Post by DJM » Tue Sep 04, 2018 2:51 am

You might need to use a bigger hammer! protect the threaded end by laving the nut in place, than give the nut a clout, as hard as necessary, if you need to, support the other end of the cam, When it's free the bolt will be loose in the cam which should then come out of the sprocket OK.

jnbmoore
honda305.com Member
Posts: 16
Joined: Thu Oct 26, 2017 8:00 pm
Location: Ohio

Post by jnbmoore » Wed Sep 05, 2018 8:50 pm

DJM,
How hard a smack should I give it? Kinda gun-shy here as I hate to break or bend something. That locking bolt is in there real tight although I can squirt some PB Blaster at the bolt threads and it'll come out from the cam sprocket on the other end.

Anyone have any other tips here?

User avatar
G-Man
honda305.com Member
Posts: 5678
Joined: Wed Mar 25, 2009 5:17 pm
Location: Derby, UK
Contact:

Post by G-Man » Thu Sep 06, 2018 1:38 am

You've got to release that taper before you can get the cam apart and the cam is pretty bullet proof.

As DJM says - run the nut off so that it is flush with the end of the thread and give it firm blows with a (2lb) hammer. The taper will give way and the nut will move up to the end of the cam.

If it doesn't move, you haven't hit it hard enough.....

G
jnbmoore wrote:DJM,
How hard a smack should I give it? Kinda gun-shy here as I hate to break or bend something. That locking bolt is in there real tight although I can squirt some PB Blaster at the bolt threads and it'll come out from the cam sprocket on the other end.

Anyone have any other tips here?
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

jnbmoore
honda305.com Member
Posts: 16
Joined: Thu Oct 26, 2017 8:00 pm
Location: Ohio

Post by jnbmoore » Thu Sep 06, 2018 4:37 pm

Got it loose!! Trick was to use a 16 ounce flat face or claw hammer. Two whacks and it gave. I guess the metal-to-metal shock is what did it. After that, it all fell apart relatively nice and easy. Thanks to all who offered advice and tips.

Post Reply
cron




 

CB-77 | CYP-77 | Road Test | Riding Log | Literature | Zen | Marketplace | VJ Survey | Links | Home