Cam sprocket onto cam shaft.

[Magua]

Trying to reassemble my bike, but it's being stubborn.

Cylinder's back on, so's the tensioner, tensioner blade, head etc. Trying now to get the bloody cam shaft sprocket on now.

I can get the chain onto the cam sprocket, but it will not go onto the cam shaft shoulder. Just refuses to, like the chain's too small or something.

Suggestions?

1980 Honda, cb400n.

[Magua]

Btw, my head and base gasket cement is rapidly drying, so any quick suggestions would be greatly appreciated before they're ruined.


EDIT: Maybe if I add the rocker assemblies and then add the engine bolts (they pass through them), torque them up. Might push the head and cylinder down, giving me more room to work with the chain?

Double Edit: Wont work, can't add one of the rocker assemblies because the fucking sprocket's in the way.

[Shaun P]

Usually you would do the tensioner last?

[Magua]

No. You need to remove the camshaft to get to the tensioner.

[The Pastor]

Tbh i saw this coming aye.

No idea how your going to do it.

[Magua]

Maybe my tensioner's fucked?

[The Pastor]

Are u sposed to rivet it last?

[Magua]

Rivet what last? If you're talking about the cam chain, no. It comes off the sprocket as a whole, it should go on the sprocket as a whole.

[Bonez]

What bike?

[Magua]

1980 Honda Cb400n. Should have specified in the first post. :P

[Squiggles]

Tensioner is taking up the slack in the chain?

[Ixion]

You usually have to manually retract the tensioner tensioning spring. Often by something like an allen key in the adjuster. What does the manual say ?

[Magua]

It says to put the chain onto the sprocket and then to lift the sprocket onto the shoulder. :P Ill consult the Haynes.

[Bonez]

Try loosening off the tensioner lock nut, then with a tyre lever or large screw driver push the tensioner blade back a bit then nip up the nut to hold it back. Be careful not to gouge the tensioner blade.

[Ixion]

Yes. The nice new chain is tight, so you have to force the tensioner back to allow it some free play. How you do that on a Honda I do not know. On a Yamaha you put an allen key into the chain adjuster shaft and turn it anticlockwise and lock the tensioner at full retract.