SOHC.co.uk Forums > CB350/400

400/4 low oil pressure + Other Misc problems

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Mr-Gear:
I will try a different oil then, I did notice that one of the clutch plates was thinner to account for the snap ring on the outer steel plate of the clutch assembly.

Will the Halfords Semi Synth 10w40 be ok to use?
 (Link: http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_221725_langId_-1_categoryId_165507)

 I herd a murmur that modern oils can be dodgy in old engines.

And Could Engine oil alone really be causing that much trouble with gear changing? I had a friend pushing me with the engine off at one point trying to get out of second. is there anything else to look for or other suspected points? Any linkage? (I think there's some under the clutch cover). Attached is a picture from under the cover, unfortunately I lacked the foresight to take a decent photo of it square to the bike


As for the cam chain adjuster bolts, I'm a bit sceptical to try it at the moment as from the pictures I attached the bolt looks quite rusty and I'm worried it will break off. any get out of jail free advice with that? Maybe wire brush the bolt from the outside to help with the nut and heat the engine up with some penetrating spray and light tapping with a pin hammer before I work it with a socket?

tom400f:
See oil discussion here: http://www.sohc.co.uk/index.php?topic=6662.msg36747

For the camchain bolt - yes it is easily broken off. Penetrating spray and leave for a few days, heat with a small blow torch, loosen the locking nut and use a small spanner only. Tap to loosen corrosion - all those things. Be very careful.

ka-ja:
Hi,
 Concur with the others, wrap some rag around the adjuster lock nut to hold the penetrating oil longer.
  If you remove the selector arms etc for examination, you should be able to check gear selection by turning the selector drum by hand, may need the output shaft(sprocket) moved back and forth to mesh the gear teeth.
       One obvious question, did these problems all occur before or after the clutch clean?----Ken

Mr-Gear:
Oddjob,

I've dropped the oil pan and there was quite a bit of sludge and a little gritty stuff in there (Not much) so the sump hasn't been cleaned out for a while. but whilst I had it off I did take a quick glance up through the engine and I couldn't see any damage on the gears.

I think I'll try the oil first, take the clutch plates out, inspect what I can and give the plates gunwash bath, and refit/oil with the proper grade oil and go from there.

I shall try the penetrating oil rag trick next time I go up to look at it.

Thanks for your advice gentlemen!

K2-K6:
You can also make a small pocket of something like blue-tak if you want to soak it in penetrating oil...something like a kangaroo pouch type thing to leave it a while.

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