CB400 - Upper Blanking Bolt

[Nurse Julie]

Putting it in perspective,  lucky you've not got one of these to assemble.
(Attachment Link)

Can't imagine what that lot costs to replace!

 

I have no idea what engine that is but it is stunning.

[Integra99]

Thank you, yes now I know I have all I need apart from the top bolt so can fix that.

That engine is incredible looks like more like an automatic watch!

[Trigger]

Putting it in perspective,  lucky you've not got one of these to assemble.
(Attachment Link)

Can't imagine what that lot costs to replace!

 

Looks like a Audi B6 engine 

https://redlinespeedworx.com/audi-v8-timing-chain-service-real-story/

[K2-K6]

Audi V8 4.2 ltr petrol. Well spotted Trigger.

Fascinates me the complexity of it compared to the engines of the forum. Apologise for the thread drift though Julie's pictures inspired me to offer the comparison.

But also,  for all its modern spec and development  it has more or less the same BHP / litre figures in it's most potent setup as that 400 Four engine. Just shows how remarkable these little Hondas were when originally made.

I think they are a truly inspired piece of production engineering.

[Trigger]

I do hate modern engines, takes too long to even do the valve clearances on a Honda V-tech engine.
Had a new fire blade in that the owner had dropped and cracked the crank case. You can't even weld the modern alloy as if has magnesium in it, touch it with a welder, it just blows holes in it. The modern throw away society 

[TheOlderGentleman]

No it's just a blanking bolt at the top of the drilling the push rod runs in. If you choose to push down on the end of the rod while tensioning, then as always on all these engines, just enough and no more is what you need. They used to say "gently while the noise lessens" or something like that.

All of this, yes.  The problem is the 'horseshoe' under the crank burring its pivot and then sticking.  You can free it off by removing the sump and going in with a broad-bladed screwdriver to push on the cast-in lug, and a bent coat hanger to pull it back again.