SOHC.co.uk Forums > CB350/400

400 four knocking noise.

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Clem2112:
Kevin

Can I buy a set please - cannot see them on your website.
What would it cost for these with shipping to the uK?

Cheers

Simon

ttr400:
Simon,

Replied to your email. but yes i have a few sets available for sale.

Kevin

tom400f:
So....... popped round to Lobo (Simon)'s place on my 400F today to compare engine noises. Arrived at may be 1:45 or so and by that time Simon had already removed the clutch basket, replaced the cover, filled it with oil, started it (quiet as a baby) then put everything back again, refilled with oil ... all in a day's work.

Took my son with me. 120 miles round trip max attempted speed 85mph on the M3. Pulls top gear into the wind on pretty much all inclines bar one..... but I digress

We agreed that Simon's clutch sounds like a bag'o'nails at tick-over. Even in gear with the clutch disengaged and the rear brake on there is noise, whereas mine is quiet like that and just a bit of noise in neutral. Lines of enquiry such as (may be) dodgy pattern clutch plates to follow up. But yes, quite noisy if nothing to worry about.

Everything else about our engines sounds the same - silky rustling  8)

It has to be parakeet yellow dahling!!

Lobo:
Yup, generously Tom came over, and there is a 'problem' with my clutch. Until yesterday I'd had nagging doubts as to primary chain, due a muted clattering in the sump area. I pulled out the dipstick - and bingo, the noise ramped up to a dry metallic clatter suggesting not primary chain as that'd be mostly immersed (=muted). And just to verify, I pulled out the clutch basket, rebuilt the casing... engine sillky / turbine like... no rattles from anywhere.
(Just for reference OddJob, rotational play in the primary shaft about 2mm at its gear circumference)
Help / comments then. Back along I wrongly stated I'd got a new clutch basket, actually its simply new (DSS) A & B plates & new springs. No discernible play in the basket when I had it out this am, all solid - using my toned (not) muscles anyways.
Very wary of ebaying a second hand basket as it could be no better than mine.
If its reckoned all due basket cushs - what is actually the SOURCE of the clatter, mine has zero play anywhere that I can ascertain.
Kevin - do you reckon your basket cushs will fix it.... can you contact pm me details if you think you can help? (Inc postage costs)
Cheers,
Simon.

Clem2112:
Might be that the assembly is imbalanced somehow... Tolerances, etcetc.
That may give rise to another vibration and so more clatter.
 
Maybe re assemble the plates by turning them all 180 degrees in the basket?

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