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Topics - K2-K6

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1
Misc / Open / New tools
« on: October 31, 2025, 07:47:52 PM »
I've a reasonable range of tools, not excessive, but like things that pull their weight for projects and maintenance.

With some recent consideration in wondering about filling a little gap, bought on of these "MILWAUKEE M12BLIDRC-202B 12v BRUSHLESS IMPACT DRIVER" as a light duty/bench work and small form device.

Screws, small bolts, torx, hex key all in my intended range. I dont have anything of this brand, and so no commonality with battery, charger etc. It looked tbe most balanced in being compact, sufficient torque, controlled application at slow & delicate movement of targeted items.

I'm honestly very surprised at just how good this is. Genuinely small form and superbly applied torque even for the most delicate fixings (metal screws into plastic housings) with such a wide range of use because you can get access relatively easily.

A 1/4 inch hex drive, which will need either a converter to something like 1/4 &3/8 square to bring sockets into play. Have also bought others for torx and Allen key straight to chuck in native fit.

Bought from here https://www.angliatoolcentre.co.uk/milwaukee-m12blidrc-202b-12v-brushless-impact-driver-2-x-2-0ah-batteries-charger-and-bag-pid53455.html as best priced deal (having no charger or batteries in my possession) it's not a cheap bargain basement item, and a little of a punt to find out. But, utterly convincing as very adaptable and genuinely useful tool for the workshop.

As a test, put a 1/2 square to 17mm impact socket on, then tried the wheel nuts on family VW that are torqued to 90 ft/lb  .... and it juuuuust about got them undone. Apparently out of range and not particularly practical, but demonstrated some level of potential. 
As I've noted,  I bought it for the other end of range specifically, but practical band width is very impressive from the delicate and small end all the way up to serious level.

Postal delivery was exceptional from that dealer too, one which I've not previously used.

2
Misc / Open / Now here's a thing I find odd
« on: August 02, 2025, 06:29:45 PM »
I find it an odd way to ride or drive something without rev matching going down gear ratios, quite severe downshift in this video

https://youtu.be/Z962LAhQaH8?si=q7kQRD_KElCN_TY3

In both bikes or cars, I like it to be imperceptible and smooth to change down a ratio. Is that odd ?

Only in very specific circumstances in a car, but not bike that I'd use that method to indice rear attitude to chassis.

3
Misc / Open / Ethanol in fuel
« on: June 02, 2025, 01:27:42 PM »
For those interested, link to a reasonably considered evaluation of fuel sample

https://youtu.be/cdHZsgiuXVQ?si=dWIpTbkKP2yHh5Kt

Certainly from point of evaluation that it's a repeated test he notes after two years prior also testing that supply too.

4
Other Bikes / Staffs show auction etc
« on: May 01, 2025, 09:27:33 AM »
some interesting outcome from this sale, most of it is auction in this yt clip

https://youtu.be/SAx_YrsRdRc?si=2TTF-7HJW5zXwq2K


Don't look at the Jota Dave  :)

5
SOHC Singles & Twins / Twin cylinder special
« on: March 26, 2025, 02:30:53 PM »
I nice interest piece on old Honda racer

https://youtu.be/EXGxYjUWE3o?si=e4Z-BvVWF9uMfk1O

6
Humour / If you're having trouble with !!
« on: March 06, 2025, 06:02:21 PM »
Some sage advice on here that amused me

https://youtu.be/iS1L6mWpkqQ?si=679wSl7L0P-DLeyV

Often getting brake fluid contamination of engine oil  ;D i think it just spulls out during heavy braking, straight into the engine  ::)

7
Misc / Open / interesting engineering story
« on: October 24, 2024, 08:31:49 PM »
Interesting content

https://youtu.be/kO0YsSqGsv8?si=uu0pBKGrpwf3y7ap

Don't think its been brought to forum previously, but possible  :)

8
Anorak's Corner / Carburettors with more depth of discussion
« on: October 03, 2024, 09:16:11 PM »
To discuss and, hopefully inform, with more in depth discussion of carburettor function and how it relates to these SOHC bikes along with their setup.

9
Misc / Open / Technical but not bike.
« on: May 31, 2024, 07:26:31 PM »
Interesting channel, engaging couple, good skills but funny outcome

https://youtu.be/-OKADykW3io?si=F8-GcVfo3Lb-Drc-

Takes a while, but good story and conclusion, if you've some spare time to watch.

10
Anorak's Corner / Brake, brake, brake ... a missing link
« on: May 28, 2024, 11:48:36 AM »
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.



11
Misc / Open / Engineering interest
« on: January 28, 2024, 11:30:35 AM »
For those interested in engineering thinking, design and application, this is a really really good watch

https://youtu.be/m7uZu_Wsdis?si=6lJopnvW44Uqvx11

A very lucid walk through of race car design engineering, Honda powered  :)  with many gearbox and clutch component design shared with bikes.

Quite long, but very worthwhile viewing.

12
Misc / Open / CB 750 On't telly
« on: April 14, 2023, 02:13:19 PM »
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  ;D 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 :o

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.

13
Misc / Open / Technical appreciation
« on: March 28, 2023, 12:00:30 PM »
For those interested in deeper examination of mechanical parts within some engines

https://youtu.be/F39gjxxGHfY

Warning, for the impatient it may not be for you  :) slow delivery but a very lucid look at this element of engineering from Brian Garvey.


14
SOHC Singles & Twins / Replacement fork triple clamp
« on: March 13, 2023, 07:35:09 PM »
Unsure if posted already https://youtu.be/9mj7plpnemw as title with someone making available new part to substitute for damaged/ no longer available items.

15
CB750 / CB 750 Profile
« on: March 02, 2023, 07:50:28 PM »
https://youtu.be/s6SzJsHOR9o

Looks interesting,  haven't watched it through yet.

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