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Topics - K2-K6
2
« on: December 15, 2025, 01:26:54 PM »
Having recently worked on some more diverse vehicles, thought there's some things that are of benefit here in SOHC world that maybe not seen in our local relm. This one https://www.ebay.co.uk/itm/357862362653 a broad spectrum anti seize compound with application possibilities in spark plugs and front caliper pivot pin, also rear drum brake arm pivot etc. Heat range -51C to 871C likely to exceed most of these locations. Applications in marine environments too for that front brake arm being slooshed down in saline supply for those that ride in winter.  Permatex anti seize the product, available in different formulation with this example looking most useful to this forum's interest.
3
« 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.
4
« 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_TY3In 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.
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« 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=dWIpTbkKP2yHh5KtCertainly from point of evaluation that it's a repeated test he notes after two years prior also testing that supply too.
7
« on: March 26, 2025, 02:30:53 PM »
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« on: March 06, 2025, 06:02:21 PM »
Some sage advice on here that amused me https://youtu.be/iS1L6mWpkqQ?si=679wSl7L0P-DLeyVOften getting brake fluid contamination of engine oil  i think it just spulls out during heavy braking, straight into the engine 
10
« 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.
12
« 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.
13
« 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=6lJopnvW44Uqvx11A 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.
14
« 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 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.
15
« on: March 28, 2023, 12:00:30 PM »
For those interested in deeper examination of mechanical parts within some engines https://youtu.be/F39gjxxGHfYWarning, for the impatient it may not be for you slow delivery but a very lucid look at this element of engineering from Brian Garvey.
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