SOHC.co.uk Forums > CB350/400

Cam chain adjuster bolt 400-4

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Tiny Tim:
I've put the old one back in for now and will have a chat with a couple of engineering shops nearby.
Onwards to the next issue.
Cheers
Tim

mike the bike:
When I mentioned seizing, I was referring to the horseshoe shaped tensioner arm that transfers the force from the spring at the front to the slipper blade at the rear of the engine.   Also the plunger that pushes the horseshoe thingy. 
I would go along with Royhalls suggestion and get one made - in stainless preferably.

Lobo:
This any use?

http://noxandrattles.co.uk/CAMCHAINADJUSTERREPAIRKIT.htm

Simon

mike the bike:
That looks the biz, go for it

exvalvesetdabbler:
The horseshoe tensioner that is prone to sticking is usually due to a very slack cam chain that has been rubbing on the pivot and peened over some of the metal.  If it's not too bad you should be able to dress the damage with a small triangular  file to free off the pivot. The spring if original may also be getting a bit tired by now.

You can test if it is free by removing the bolt that covers the end of the tunnel where the plunger goes and inserting a piece of 3mm rod. Turn the engine backwards and you should feel it move out a little.

This is how I tension the cam chain by pressing down on the end of the plunger to give the spring a helping hand during adjustment with the engine running. Pressing down onto a 3 mm rod with your thumb will hurt long before you over tighten the cam chain!

Oh - and don't forget to put some copper grease on the new bolts.


Regards
Dave

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