SOHC.co.uk Forums > CB350/400

I think I've done something wrong!

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McCabe-Thiele (Ted):
So that's why I have yellow dots on my engine bolts to remind me they have been torqued up!

Oddjob:
Yellow paint was used by Honda on the production line for that very reason Ted, it also showed if the owner tampered with the bolts in case of warranty claims.

SeanFD:
Using a magnet, I was able to fish out a couple of additional bits.

Then I turned the motor over slowly - yes Ted, the plugs were out - and all seemed fine.

So now it will have to sit for a while until I get back to Belfast, when amongst the other things, I'll drop the sump, check the strainer and change the filter.

Until then ...

McCabe-Thiele (Ted):

--- Quote from: McCabe-Thiele (Ted) on December 27, 2023, 12:17:50 PM ---That's bad luck Sean - I've generally  ensured that the dowels are on the fixed surface first so they can't drop out. It has meant I have had to replace a few as they chewed up a tad on extraction.

As has been said any unaccounted for big lumps should drop down into the sump - goes without saying to change the oil filter. Have you fitted a magnetic sump plug might be worth it as belt & braces.

--- End quote ---

SeanFD:
Or new title: Everything happens to me!

On my enforced sabbatical from my USA trip, belfast2belfastbybike.com for those who don’t know, I decided to get this bike up and going.

I took the rocker cover off and almost the first thing I saw was the dowel I thought was the culprit; intact and lying against the oil pipe. Obviously it had just dropped out of the rocker cover when I removed it.

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Replacing the bolts into the cam sprocket was difficult - they felt tight. I got one in and torqued and was doing the second when it stripped! (Original Honda bolt)

I was thinking to take the camshaft out to inspect the threads more closely when I noticed what looked like a crack in the lobe where the bolt goes. I touched it with a screwdriver and the result was not pleasing!

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While trying to gat a hold of this piece and not being careful enough, (how could such a chunk of metal fall down that small hole?) I dislodged it and down it went. I think – I hope – that I can retrieve this by dropping the oil pan, because my efforts to find it from the top were unsuccessful.

So that put paid to my hopes of getting the bike running quickly. A replacement camshaft is on its way from Steve Cooper at 400FourBits, along with some new bolts and a gasket from DSS.

Anyone seen this happen before? No I didn’t drop it, but someone else may have I suppose. I guess I should be happy that I found it now and not when to cracked at 6000 rpm, but sometimes it’s hard to be philosophical 😢

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