SOHC.co.uk Forums > CB350/400

400 four knocking noise.

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Clem2112:
O rings may create more friction or possibly wear too soon unless greased  ? .

There was a website describing a full carb strip and rebuild including making those felt rings.... the link was on the now defunct CB400F.btinternet site but might exist on Yahoo groups?

Lynx:

--- Quote from: Clem2112 on September 05, 2013, 12:30:12 PM ---O rings may create more friction or possibly wear too soon unless greased  ? .

There was a website describing a full carb strip and rebuild including making those felt rings.... the link was on the now defunct CB400F.btinternet site but might exist on Yahoo groups?

--- End quote ---

Yes I got the instructions off Yahoo Groups.

Lobo:
Thanks OddJob, good info.

With the bike on its centre stand, and at low idle, if I were to 'load' the engine... ie put it into gear & apply gentle brake to the rear wheel, should the knocking noise disappear IF it were due to primary chain rattle? (presumably carb imbalance would 'fail' tis particular test)

Lobo.

Clem2112:

Then there is that set of damper/cush rubbers inside the clutch basket but they are not serviceable (and not available) as the basket is riveted to its gear of course.
These segments of rubber will be as pliable as hard plastic now and zero damping - another source of noise and chatter further along the drivetrain.
New clutch basket if there is too much play but opinions vary. If the rivets are tight I think it's OK.
Heard somewhere on the web that a few Kawasaki enthusiasts have had sets moulded for their Z650s clutch baskets.

If I could find a place to rivet the gear to the basket it  would only need a way of making the dampers !
 


 

ttr400:
Yes the play on the basket gear is due to the damper rubbers being hard and brittle. there will be no play in the rivet.
I do a few damper rubber sets made and have fitted a few. the assembly goes back together using HT M5 screws. the rivet hole is the correct size to just tap to M5.
Kevin

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