Honda-SOHC

Topic debated before, assembly of front brake caliper and the lubricant to use in this assembly.

From 1970 CB 750 Honda workshop manual;- Verbatim  "Note : Use silicon sealing grease (temperature range of -67~ 392 F (-55 ~ 200C). Do not use molybdenum grease known as brake grease. "     

This accompanying a schematic of caliper showing the application point as both recess that accomodate active and fixed pads.

Also from Honda workshop manual 1978 CB 750 (last of SOHC bikes, with illustration of the K7 caliper in arrangement parallel to all the previous 4 cylinder motorcycle  calipers;- verbatim "Install a new piston seal. Coat the piston with silicon grease and install it. Apply silicon grease to the brake pad outer circumference and install."

This, in my appreciation of it, is that Honda direct the use of this grease only in assembly of the caliper.

Anecdotal view, I've  been using silicone grease in this way for some time. Part of this is that it appears to be the only common one I can use in system with mineral oil, or conventional dot fluid or silicone based fluid.

Interestingly, I dont get brake squeal in any system when using this method. It seems to offer the most competent piston return over significant period of use, being all but impervious to water ingress when exposed to poor working conditions too.

Both cycle disc (working on two four and six piston  calipers) that have very concise demands in preventing drag by piston contraction when releaesd, also cars & bikes when placed on mot rollers to test, these having notably extremely low drag before brake application.

Anyone see the eposide, last night, of Mike Brewer dream cars (or something like that) in which they trade their way upwards to give someone their dream car.

One of the vehicles bought and sold was a CB 750 partly built by a restoration expert "Andy" as he didn't want to complete for reason of, too much work.
Usual description, motor gone through, new tank and painted bits to go with it. The show "fall guy" for drama was most of a 4 into one system, without silencer.
Que explanation by Mike as, rare as hen's teeth, impossible to buy, no replacement made of the 4 pipe system needed to complete. He'll get on the blower to "World wide" contact network to see if he could locate such unicorn items 
Cut to later round up, he'd located a chap called David Silver no less !! and found none available to supply for another 5 months  but good news, customer had returned a set he didn't need  that could be purchased for a reduced £900 yay, pipes arrived, Elvis fitted them,  set final drama of the " will it start, won't it start" shenanigans just for the punters you'll understand. 
On the button, first time........but looks like a lot of throttle Elvis is using to keep it going there

Sold via bidding to happy new customer.

Cut to real target, Caterham super 7 for happy ending. Aaaaaah.

Oh, and the alignment of #4 downpipe looked, ahem, not quite matching other pipes, that's just from a quick look in telly land editing.  Probably why they were returned to DS if that's definitely there.

Reg no PMF 115R and thought they said a 1972 model, painted fork ears too, likely a bitsa. Thought it had K2 top yoke and clocks, possibly.

Unsure if posted already https://youtu.be/9mj7plpnemw as title with someone making available new part to substitute for damaged/ no longer available items.

I love this era superbike racing, pretty good looking modern build

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Link to site https://ultimatemotorcycling.com/2014/10/17/freddie-spencer-tribute-cb1100-benefit-ride-kids/ as its built for charity auction.

It's a fairly short article, but does illustrate just how much of a challenge it is to match combustion fuels in numbers that attempt to operate in the same performance field https://www.crash.net/motogp/feature/1018665/1/triumph-electric-power-let-s-not-kid-ourselves

In an ideal situation these developments and consideration would have happened 20~30 years ago, in which case decisions wouldn't be in such a forced state now and with more evolved solutions to accomplish differences in end user profile.

I've put the race link here as I believe it offers more open comparison of raw capabilities in direct numbers than alot of the consumer facing fluff that's put out currently. 

Looking at Ken's thread on disc brake material, I was doing a little digging in such topic and came across this on the  .net Honda forum http://forums.sohc4.net/index.php?topic=109502.0 

It's about the thirteenth post in the thread, quite an adventure by all accounts 

https://www.ft.com/content/87810640-5cd2-4a45-ba9f-87e2a3492806

Discussion on here some time ago about building a bespoke exhaust system,  found this while wandering the www https://youtu.be/5xQavghdb14 and thought it was quite an elegant low-risk cost of prototyping something individual.