About 11 minutes in they crank up the RC166

[HenryDorsetCase]

[/QUOTE]

apart from that its all Japanese and I have zero clue.

[AllanB]

Ha - I posted this recently. Got a link to in in my e-mails. Amazing video - use the arrows at the top left to move your view.

https://www.cycleworld.com/calming-c...MPID=ene040118

[cheshirecat]

Amazing really - 60 years ago and still raising the hairs on the neck. Way back in the 70s in England met a guy who collected Honda 50's had over 30 of the things BUT in a little garden shed had three motorcycles. A MV 750 - which he started up giving a sound of the worlds most sophisticated gravel crusher until it fired up and tucked away two Honda IOM 250 fours. Apparently Honda just dropped everything, packed up and left. These 250's he managed to get as if they'd just finished a race. There was Araldite all over the crankcases and they looked quite patched up but given the tech of the day shows how far we've come. Amazing bikes- so small and so much into their engineering, like jewels really.

[rastuscat]

Puts me in mind of the sound of a GT380 with ratted mufflers. A bit disrespectful I know, but it was the first thing that crossed my mind.

[malcy25]

I need to find the vid I took in 2004 at Eastern Creek behind George Beale's replica. When you hold the video camera, it's very hard to find two fingers to stick in ears....

Absolutely no fly wheel - which is why they sound like a barking dog.....when warming up and when you shut the throttle they stop instantly. It's basically only the engine firing which is making it go round....

15 years ago the 6 replicas built were 235,000 pounds each. Beale and the engine guys who helped (JPX) had a massive task to work out some of the stuff that Honda did. Surface treatments, coatings etc and the like - Honda themselves could not tell them, and the process was never seen anywhere else. The guys who built the bikes have retired......

In places, space was so tight, that they used two smaller oil feedholes, stacked, rather than one bigger dia one.

[Michael Moore]

Here's a photo I took of a 6 cylinder con rod at a friend's shop when he was doing some work on a crankshaft

http://www.eurospares.com/graphics/e..._RCcranks7.jpg

cheers,
Michael

[HenryDorsetCase]

Here's a photo I took of a 6 cylinder con rod at a friend's shop when he was doing some work on a crankshaft

http://www.eurospares.com/graphics/e..._RCcranks7.jpg

cheers,
Michael

Blimey. I'll confess my ignorance and say I thought that they were a forged onepiece crank with plain bearings (like a CBX or 750/4). Because that is a complete ring the inference I have taken is a built up roller bearing crank.

Is it covered in copper or copper grease or something?

[husaberg]

Blimey. I'll confess my ignorance and say I thought that they were a forged onepiece crank with plain bearings (like a CBX or 750/4). Because that is a complete ring the inference I have taken is a built up roller bearing crank.

Is it covered in copper or copper grease or something?

when you make a conrod with a roller big end they are coated in copper so when the big end is surface hardened the hardening only effects the exposed big end. rahter than the whole rod which would make it brittle
I posted a write up on the RC166 somewhere with many pics
https://www.kiwibiker.co.nz/forums/s...itish-Euro-etc
https://www.kiwibiker.co.nz/forums/s...post1130887050
There was a great pic in a classic bike that had the crankcase with a coke can for scale its f-ing tiny
but that pic of michaels is amazing
I actually already posted that video as well....
Cameron covers the honda 6 crank here.
https://www.cycleworld.com/calming-c...cylinder-racer

[pete376403]

One of my favourite pictures, from an article about the Beale replicas

[husaberg]

I cant find the one with the coke can but here is a few others plus on of the 50 twins crankshaft
The team obsolete trophy is one I had never seen before.
Note the blue print drawing is the 297 cc version they used for the 350 class


Michael can confirm if he took the third pic as well as it looks like the same hand