Honda-SOHC

SOHC.co.uk Forums => Project Board => Topic started by: Winterfield on March 26, 2019, 09:54:57 PM

Title: Winterfield's first project (400/4)
Post by: Winterfield on March 26, 2019, 09:54:57 PM
I wanted to do a project log for my own documentation, to show my project off to any friends who may be interested, and to share the journey and any interesting tips with anyone else who may be interested.

I'll not put dates on these first set of posts, as it's been a long while in the making, and fairly slow progress, but it keeps me busy.

Firstly, the bike:

'75 CB400/4. Red. 2 1/2 engines, one seized, the other in the frame. Original wheels, forks, bunch of other bits and pieces. Bought without seeing it running (smrt).

(https://i.imgur.com/zwkZ1FT.jpg)

(https://i.imgur.com/mOz49k0.jpg)

Naked!
(https://i.imgur.com/JQjlpWE.jpg)
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on March 26, 2019, 10:07:11 PM
Step 0. Get it running.

Carbs off, check the bowls. Tiny amount of residual fuel, but no varnish. Nice. Looks like they had been drained. Fixed the cracked breather pipe.

(https://i.imgur.com/uFTK746.jpg)

Next up, fuel tank. Added some new fuel and shook it around a bit.  Drained into jerrycan through coffee filter. Lots of grit and gunk. Glad that didn't go through the carbs.

(https://i.imgur.com/XCOBF87.jpg)

Spark plugs: these had obviously been running rich, but  were gapped OK. Cleaned them up and put them back. I have replacements, but wanted to see if these were OK.

(https://i.imgur.com/Bf2GzMr.jpg)

Points: looked OK to my untrained eye. One side had an obvious gap, the other didn't. No glaring corrosion on the wires. Someone with a deep hatred for screws had obviously been in there though :(

(https://i.imgur.com/FKj6SnP.jpg)

Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on March 26, 2019, 10:17:20 PM
I'm sure I've missed pics for some steps, including putting the carbs back, plumbing the fuel tank in etc. But here goes:

https://youtu.be/vNe2TWfcJ0s (https://youtu.be/vNe2TWfcJ0s)
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on March 26, 2019, 10:26:26 PM
So, no start. First thought, fuel. Checked the bowls, got a bunch of fuel all over me for my troubles. I'd cleaned and checked the jets, so they were hopefully OK, so I moved on to spark.

Took out one of the plugs, held it to some exposed metal... and... no spark.

Lots of electrical debugging - I thought running continuity tests would give me some indication of a possible short to ground leeching power from the battery which I had charged a few days before.

Eventually I thought to check the fuses:

(https://i.imgur.com/oTVDGzj.jpg)

That's probably not a great sign.  Fuse replaced, further tracing of this and that. Took the headlight off to look for exposed wires shorting.

(https://i.imgur.com/1wNdzm9.jpg)

That's probably not great either.
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on March 26, 2019, 10:29:33 PM
Intermission!

Got to ride this beauty doing some catch up lessons before my mod 2.  Great fun that bike.

That's my other red Honda in the background.

(https://i.imgur.com/cDQ1iOQ.jpg)
Title: Re: Winterfield's first project (400/4)
Post by: mattsz on March 27, 2019, 10:07:50 AM
Hey Winterfield - I posted in your thread about the hub, too...

I can't view any of your pics - just place-holders with circled dashes in them.  I tried it using two different browsers.  Others seem to have been able to view your other thread pics, so maybe it's just me, but I thought I'd pipe up...
Title: Re: Winterfield's first project (400/4)
Post by: sye on March 27, 2019, 10:44:15 AM
Hey Winterfield - I posted in your thread about the hub, too...

I can't view any of your pics - just place-holders with circled dashes in them.  I tried it using two different browsers.  Others seem to have been able to view your other thread pics, so maybe it's just me, but I thought I'd pipe up...
Nor me, no pictures?
Title: Re: Winterfield's first project (400/4)
Post by: Laverda Dave on March 27, 2019, 10:56:04 AM
Yep, no pics here either. Are the photos you are posting to big a file?
Title: Re: Winterfield's first project (400/4)
Post by: mattsz on March 27, 2019, 11:02:04 AM
Yep, no pics here either. Are the photos you are posting to big a file?

They're links to content hosted on google, not attached files, so that shouldn't be a problem?

The other thread's hub pics are posted on the USA forum, too; I can't view them in either forum...
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on March 27, 2019, 03:36:05 PM
Yup, thanks. I've been using Google Photos - I'll switch to Imgur.
Title: Re: Winterfield's first project (400/4) - fixed pics
Post by: mattsz on March 27, 2019, 04:42:33 PM
Not sure why some members were able to view the google pics and not others... but I got them all now - thanks!  Looking forward to following your work...
Title: Re: Winterfield's first project (400/4) - fixed pics
Post by: mattsz on March 27, 2019, 04:47:15 PM
Oxford English Dictionary definition of electrickery: "foil-wrapped fuses."   :o
Title: Re: Winterfield's first project (400/4) - fixed pics
Post by: Bryanj on March 27, 2019, 06:02:22 PM
That tin foil was sold by lucas as "Smoke Release Tool"
Title: Re: Winterfield's first project (400/4) - fixed pics
Post by: mattsz on March 27, 2019, 07:04:31 PM
That tin foil was sold by lucas as "Smoke Release Tool"

Correct.  I learned all about that when I was just a curious, but ultimately trouble-making, kid interested in projectiles:

https://www.popsci.com/diy/article/2013-06/blast-turn-matches-tiny-rockets (https://www.popsci.com/diy/article/2013-06/blast-turn-matches-tiny-rockets)

(https://www.popsci.com/sites/popsci.com/files/styles/655_1x_/public/import/2013/images/2013/06/H2_blastoff.jpg?itok=gVb5Wzzp)

... ok, sorry for the hijack...  :-[
Title: Re: Winterfield's first project (400/4) - fixed pics
Post by: Winterfield on March 27, 2019, 09:30:48 PM
Oxford English Dictionary definition of electrickery: "foil-wrapped fuses."   :o

Is one who practices electrickery known as an elec-gician? or an electrickster?

Title: Re: Winterfield's first project (400/4) - fixed pics
Post by: Bryanj on March 27, 2019, 09:48:06 PM
No mate its frizzy haired geek!!
Title: Re: Winterfield's first project (400/4) - fixed pics
Post by: Winterfield on March 27, 2019, 10:06:10 PM
I decided that the dressing table I was using as a workbench was inadequate (because it was). So I built myself a workbench, and tried some fancier joinery than I had before.

(https://i.imgur.com/ZgAqpJb.jpg)

(https://i.imgur.com/c9BmMRH.jpg)

(https://i.imgur.com/nGH8Od2.jpg)

Not too long after completion I managed to drop most of a sump of old motor oil all over the top of this bench. No problem! Just unscrewed the tabletop and flipped it over :)

It was joined by some shelving to store all the spare parts, and a parts washer to take the top layer of gunk off.

(https://i.imgur.com/EA2Qq9w.jpg)
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on March 27, 2019, 10:26:59 PM
So, back to the bike.

Work split into two parts at this stage: getting the engine in the bike started, and attempting to unseize the stuck pistons in the spare engine.

After messing with the electrics, continuity tests, checking and sanding the points, I noticed that when I manually actuated the points I would get spark.  This lead me to believe that the battery was shot and was not able to turn the starter and supply enough current to charge the coils.  Someone with more knowledge might be able to confirm/deny the truth of this.

With a new battery, and with no headlight attached, there was enough juice to get it started. At first it would rev very high, then die. I suspect I hadn't tightened the carbs to the airbox, or manifold properly. I eventually got it to idle and was happy that it was a running engine.

https://youtu.be/C5RQ_t6lYfQ (https://youtu.be/C5RQ_t6lYfQ)

Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on March 27, 2019, 10:43:26 PM
On to the spare engine. It had the head off, and had likely been sitting like that for some time. No info on why it was in that state, or why it had been taken out of the bike.

I wanted to see if I could get the pistons out, with the intention of stripping the engine down and rebuilding it to put back into the bike. It could have been totally minced inside, but I had a working engine so I didn't see I had much to lose.

First steps were to try and loosen the pistons by way of soaking them with penetrating oil.  I wasn't sure which to use, so I thought I'd experiment and tried motor oil, Halfords penetrating oil, WD40, and machine oil. One for each cylinder.

(https://i.imgur.com/cI1qghl.jpg)

Left it for a week or so, and hoped to see the oil levels drop as it made its way down past the piston.  No noticeable change, and the crank would not turn. I didn't expect that would work, as this would of course require all of the pistons to be freed.

Someone recommended that I pour boiling motor oil (!) into the cylinders. The idea is that it heats the piston and sleeve, and while they're expanding/contracting at different rates, the oil makes it down past the pistons.  No dice here though. Also tried some heat on the sleeves from a butane torch.  I suspect that one of the issues with these approaches is the steel sleeves and the aluminium pistons just disperse the heat through the cylinder fins.
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on March 27, 2019, 10:58:07 PM
I read that it is possible to get the barrels off if you split the cases, and then unbolt the big ends of the connecting rods.  So onto the bench it goes.  This is when I should have checked that the sump was emptied before the engine was removed from the bike. It wasn't.

(https://i.imgur.com/TKDrVqc.png)

Pictured here: the underside of the top half, with the connecting rod bolts showing. Note also the lovely new oiled bench top finish.  If it seems like I'm going on about that, it's because I am. It still stings a bit to have made such a rookie mistake - no doubt one of many.

(https://i.imgur.com/sGPro8X.jpg)

After getting the barrels off, I was able to extract the pistons. I didn't get any pics of this, but the process involved a small cylinder sized block of wood to protect the piston and sleeves, and a hammer. Some somewhat gentle persuasion and I managed to get the pistons out.

(https://i.imgur.com/QLuRhSM.jpg)
(https://i.imgur.com/m08ssdC.jpg)
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on May 06, 2019, 11:51:32 PM
Now that I've satisfied myself that the spare engine is somewhat salvageable, I moved back onto the frame.

I found that the method of having the bike go to sleep with an engine, and wake up without one worked quite well.

(https://i.imgur.com/690kQtJ.jpg)
(https://i.imgur.com/PJFMie9.jpg)

Now that the engine was out, everything came off the frame, and the engine was fogged, covered, and hopefully won't rust.

I started to mess with options for cleaning parts on the cheap - this one using my wire wheel on the bench grinder. Very efficient, but keep it well away from aluminium.

(https://i.imgur.com/pRV6nYt.jpg)
(https://i.imgur.com/PCGgbT2.jpg)

(https://i.imgur.com/v83SuAZ.jpg)
(https://i.imgur.com/9RWZe6X.jpg)

I suspect that if I put those bolts back into service they'll rust within the week. I am considering attempting some zinc plating myself, but I might just collect everything up and send it off.

Here are more parts ready for painting, currently all cleaned using the wire wheel.

(https://i.imgur.com/jJIcQQv.jpg)



Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on May 06, 2019, 11:59:34 PM
My first goal is to get a rolling chassis going. So I figured I'd start ground up, and get the wheels done.  The rims and spokes were in bad condition, so I opted to get new spokes and rims.

(https://i.imgur.com/kaJgi63.jpg)
(https://i.imgur.com/rWGz9LV.jpg)

Not likely to have any luck unscrewing those nipples, I opted for the quick and dirty route:

(https://i.imgur.com/qowDdnV.jpg)

... Like a hot knife through butter.

I was also keen to keep cleaning parts myself, sans any blasting capabilities, so I invested in some more wheels for the bench grinder. Satin wheels and polishing mops and compounds.  These satin wheels are great, but don't last too long, particularly on hard edges.

(https://i.imgur.com/29MGZHs.jpg)

(https://i.imgur.com/Sm0kbBv.jpg)

This hub has only been cleaned up with a satin wheel.  I later polished with 3 polishing mops and made it shine.

(https://i.imgur.com/hZqToYS.jpg)

Tappet covers are a great example of the cleaning process.
(https://i.imgur.com/C5f98Vb.jpg)
Title: Re: Winterfield's first project (400/4)
Post by: Nurse Julie on May 07, 2019, 08:24:16 AM
Looking good
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on May 07, 2019, 09:05:47 AM
Thank you. Lots of work to go, but last night I finally opened my wallet and bought many parts. Am looking forward to Christmas arriving shortly.
Title: Re: Winterfield's first project (400/4)
Post by: SumpMagnet on May 11, 2019, 10:50:33 AM
a well oiled bench will be protected from damp and moisture....and woodworm....for years to come. don;t think of it as an accident...think of it as an excellent dose of wood preserver...

And if you think that was bad...I once rebuilt a Kawasaki KH250 in a rented upstairs bedsit....and I did the same. Forgot the gearbox was full of oil and split the cases. After I moved the furniture....you could hardly tell the carpet was ruined. The parts were dry built up there too....Final build weas outside, and it was all carted down. Getting it up the stairs was easier.....but it took a few days before the smell of 2 stroke finally went away......
Title: Re: Winterfield's first project (400/4)
Post by: PHILIP2908 on May 12, 2019, 08:51:53 AM
Hi,
Great rebuild story and look forward to each episode.
Looks as though you are lucky to have a good & dry garage to do your rebuild in. The only advice I can offer is to get some cheapo white emulsion from B&Q and throw it on the walls - with any available light now multiplied, the difference this makes is amazing.
Keep it up !!
Phil @ Cheltenham
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on October 24, 2019, 07:19:13 PM
So, Christmas arrived (way back in May). Tyres, rims, stanchions, handlebars and some other little bits.

(https://i.imgur.com/ADNv7Go.jpg)

So the wheel building begins. After reading up on various websites, I decided that it would be a good idea to build my own wheels. It went OK. I got the lacing wrong the first time around - I think the method I ended up using was to put in all the spokes for one direction, then spun the hub to tighten the spokes so only the threads are showing through the hub. Then it was simple to see where the other side's spokes go from the hub to the rim.

First attempt: I tried lacing opposing spokes. This ended up with some spokes poking out way too far.
(https://i.imgur.com/aTWbZ5W.jpg)

Second attempt went much better:
(https://i.imgur.com/XJ06nZn.jpg)

Same with the rear wheels, with new hub (with thanks to Davelu88) all polished up.
(https://i.imgur.com/niqF9yl.jpg)

(https://i.imgur.com/kHpdGOn.jpg)

(https://i.imgur.com/5Nkcp16.jpg)

Tightened up the spokes and trued it with a cheap trueing stand. Plenty of other folks more qualified than me to explain the best way to do this - there are lots of good resources online.

(https://i.imgur.com/tgZCiIf.jpg)

And finally, with the tyres fitted (by a local tyre fitter):

(https://i.imgur.com/KQmAe3o.jpg)
Title: Re: Winterfield's first project (400/4)
Post by: Moorey on October 24, 2019, 07:52:38 PM
Nice to see someone building their own wheels.  :)
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on October 24, 2019, 09:05:35 PM
Time will tell whether it was a good idea or not. I'm quite concerned about whether I tightened the spokes up enough/too much. I opted not to use a spoke torque wrench when building them, partly because of the expense of buying one. But also because many of the wheel building sites I was reading said that doing it by sound and feel was accurate enough.
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on October 24, 2019, 09:15:25 PM
Next up was the frame. I opted to have this professionally done here in Edinburgh. They blasted it, and painted it gloss black.

Before:
(https://i.imgur.com/cPItq5k.jpg)
(https://i.imgur.com/lbXB54d.jpg)

After:
(https://i.imgur.com/jexIfsR.jpg)

The only thing that really irked me about the job they did was that there is some grit from the blasting which wasn't cleaned out of the frame properly. This ended up under the paint. He said that they'd found this once after priming, stripped it back, cleaned it out again, then it happened again. At which point they presumably gave up and painted over it.

(https://i.imgur.com/N4KPG5m.jpg)
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on October 24, 2019, 09:18:48 PM
I bought some new bushings from Julie, set about 'pressing' them into the swing arm with my MacGyvered threaded rod and Ikea spare bits.

(https://i.imgur.com/ysvWFmZ.jpg)

Putting it all together so far, with a new to me rear brake drum (thanks again to Julie):

(https://i.imgur.com/22tMWcm.jpg)

Looking good so far, but it needs some forks for the front wheel. The fork tubes were quite pitted, and would have minced any new seals I fitted in very short order, so those were replaced. The lower stanchions were cleaned up and polished on the bench grinder.

(https://i.imgur.com/MAIvaNI.jpg)

Note the cable tie indicating the top of the spring. Haynes says that these are progressively wound, and need to go back in the same way they came out. Not pictured is the later stage where I removed the springs again without re-marking the top. I couldn't see which was the top and which was the bottom.... soo... hoping for the best there.

(https://i.imgur.com/opg89jM.jpg)

Both cleaned up, rebuilt with new seals, boots and oil.
(https://i.imgur.com/Et9ti32.jpg)
Title: Re: Winterfield's first project (400/4)
Post by: Nurse Julie on October 25, 2019, 11:02:54 PM
Excellent progress 👍👍👍
Title: Re: Winterfield's first project (400/4)
Post by: Trigger on October 25, 2019, 11:17:56 PM
I have always found the ideal tool to put swing arm bushes in is a sash clamp.

A little advise, always keep polishing mops on sealed plastic bags, once they get damp, they do not give a good result  ;)
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on October 25, 2019, 11:36:14 PM
Thanks for that Trigger, I'll do that ASAP. My garage is not the most water tight building I've spent time in. Nor is it the least somehow...
Title: Re: Winterfield's first project (400/4)
Post by: mattsz on October 25, 2019, 11:36:57 PM
I have always found the ideal tool to put swing arm bushes in is a sash clamp.

A what now?

Hmm... I'll be back in a bit...
Title: Re: Winterfield's first project (400/4)
Post by: mattsz on October 25, 2019, 11:38:09 PM
Ahh... never heard them called by that name before...
Title: Re: Winterfield's first project (400/4)
Post by: SteveD CB500K0 on October 26, 2019, 07:33:21 AM
I have a couple of sash clamps that I inherited from my father. I think he got them from his.

He always told me that they were for repairing sash windows.


Sent from my iPhone using Tapatalk
Title: Re: Winterfield's first project (400/4)
Post by: Bryanj on October 26, 2019, 07:54:00 AM
They are basically a long flat G clamp used for assembling any large wooden assembly till the glue goe off, gets scary when you star adding the extensions to make them even longer!!
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on May 22, 2020, 08:45:11 PM
So it's been a long time since I last posted, and I have been busy during that time. Lots has happened, so I'll update with the progress so far.

With the frame painted, front shocks rebuilt, wheels rebuilt, and various bits repainted (and replaced), it's rolling chassis time!

(https://i.imgur.com/c9mLAJd.jpg?1)

And after that, I used the sleeping bike trick again to get the engine back in the frame. Unfortunately, not without some small scuffs on the frame - but they won't be seen.

Because I have two engines, I have put the running (but dirty) one back in at this stage. The plan is to rebuild the other engine entirely, repaint etc. then put it in this bike. But I wanted to proceed with the rebuild with the running engine... mostly due to impatience, but also in case I don't manage to rebuild an engine by myself.

(https://i.imgur.com/XZJBPDP.jpg)

Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on May 22, 2020, 08:50:27 PM
Painted the battery box and installed it, then installed some of the electrics.

(https://i.imgur.com/UGcQseF.jpg)

(https://i.imgur.com/XK5AcXf.jpg)

During the lockdown, not much else to do but polish my lever, paying particular attention to the knob (sorry...).

(https://i.imgur.com/oW4uFm3.jpg?1)

(https://i.imgur.com/qF47yCu.jpg)

Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on May 22, 2020, 08:59:03 PM
The dials were next up. They were a bit ratty, but nothing so bad a bit of a strip, clean and repaint couldn't fix. The faces looked reasonably good, and I didn't want to replace with newer vinyl faces because I suspect they were originals.
I did a bit of damage on the tacho when I tried to clean up the rust stain from the screw. I was clever enough to not use a solvent, but still scuffed it a bit with the dry rag I used. I left them alone after that.

(https://i.imgur.com/DNKgfZY.jpg?1)

(https://i.imgur.com/dYN7XeL.jpg?1)

I managed to do a bit of a batch painting session, but forgot to do the brake calipers :(

(https://i.imgur.com/Wg1lTgg.jpg)

I made a (really dodgy) lazy susan to try and speed up the painting process, and make it easier to paint without touching the pieces.

(https://i.imgur.com/2R7mkB9.jpg?1)

Throughout the project, I've been playing with different painting techniques. Initially, I used rattle can primer and then 'tough' paint. This time I thought I'd try a spray gun. Learning all about painting with a spray gun is fascinating, and I recommend it. I'm still terrible at it, but learning how to configure the paint gun, what consistency paint, air pressure, paint volume etc. is great. The primer didn't go on too well, but the basecoat and clear lacquer went on perfectly.

(https://i.imgur.com/hbR2M0F.jpg)

The restored dials back on the bike:

(https://i.imgur.com/Uo1GUVT.jpg)

Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on May 22, 2020, 10:38:02 PM
Now onto the electrics.

The loom was in generally good shape, with a few dodgy splices, but the wrapping was getting a bit tired.

(https://i.imgur.com/tVEfGYk.jpg)

I rewraped most of the loom in self amalgamating tape. It's not stock, but it felt more robust and generally tougher than a thin tape layer.

(https://i.imgur.com/0nUKOJZ.jpg)

And with the wiring loom in-situ:

(https://i.imgur.com/oA6Hh8d.jpg)
Title: Re: Winterfield's first project (400/4)
Post by: Nurse Julie on May 22, 2020, 10:53:39 PM
Great progress.
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on May 22, 2020, 10:56:31 PM
Moving on to the exhaust. It's in pretty bad shape, and its not something I can fix personally (without a welder and some skills). The pipes are in bad enough condition that I don't think it's worth trying to restore them. Unfortunately, some uncertainty with my work situation means there isn't money to splurge on a repro set of pipes. I also missed out on a reasonable condition set here in Edinburgh on ebay, which went a little out of my price range.

That pile of rust is just what shook free of the collector. There was more in the pipes which made its way out later.

(https://i.imgur.com/wKVbmz1.jpg)

The collector was almost rusted away, with presumably just the chrome on top surviving (to an extent).

(https://i.imgur.com/9l4LNb3.jpg)

So, with the above concerns, I attempted to patch the collector with some ebay special exhaust repair tape. It did not go well.

(https://i.imgur.com/rvK7I3E.jpg)

Attempt number two was to try heat wrap, with some exhaust repair foil underneath it where necessary to try and make it air tight. I like how it turned out, sort of cafe racer style. I guess that makes this a resto-mod now.

This stuff is made of basalt fiber, which is fairly forgiving to wrap, presumably due to the weave. It does shed, and itches like hell, so wear gloves etc.

(https://i.imgur.com/f4Wyl0r.jpg)

The eagle eyed among you will note that the exhaust collars are on backwards, and should be sticking out a little from the joints on the end.

(https://i.imgur.com/shjmGeV.jpg)
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on May 22, 2020, 10:58:08 PM
The silencer was also a little ratty, so I made do with a £36 ebay generic one.

(https://i.imgur.com/xOSliNV.jpg)
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on May 22, 2020, 11:01:07 PM
I got so close to having a complete looking bike, I couldn't resist putting the tank, sides, and seat on to see how it looks (before and after):

(https://i.imgur.com/zwkZ1FT.jpg)

(https://i.imgur.com/stZIhrN.jpg)

Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on May 22, 2020, 11:03:48 PM
Thanks again Julie, for your support!

Despite my work situation, I have been attempting to keep the economy alive by spending a small fortune at Silvers. Hopefully by the end of next week I'll having a running, riding bike.
Title: Re: Winterfield's first project (400/4)
Post by: mattsz on May 23, 2020, 12:18:43 AM
I rewraped most of the loom in self amalgamating tape. It's not stock, but it felt more robust and generally tougher than a thin tape layer.

IF that's the stuff I think it might be, be careful with any kind of solvent or gasoline.  I used something like that on some wiring and got some fuel on it, which dissolved it into a black sticky mush...
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on May 23, 2020, 12:16:17 PM
Thanks for the heads up mattsz, I'll go and do some experiments with the tape I have to see if it's affected.
Title: Re: Winterfield's first project (400/4)
Post by: mattsz on May 23, 2020, 01:19:52 PM
Thanks for the heads up mattsz, I'll go and do some experiments with the tape I have to see if it's affected.

Fingers crossed it isn't, and you'll be fine! 
Title: Re: Winterfield's first project (400/4)
Post by: Winterfield on May 25, 2020, 06:32:54 PM
My experiments on some of the tape did show damage from petrol, and slight damage from thinners.

It didn't turn into goop, but I suspect with enough petrol it would have.

Unfortunately, the loom is on the bike now, and I'm pretty reluctant to take it off and redo it at this stage. But it's good to know:

Avoid this: https://www.amazon.co.uk/gp/product/B003A5MRF8 (Self Amalgamating Tape 10m Roll by electrosmart®)
Title: Re: Winterfield's first project (400/4)
Post by: mattsz on May 26, 2020, 03:33:34 AM
Well, at least you know you need to be careful around your solvents...
Title: Re: Winterfield's first project (400/4)
Post by: BlackBomber400 on May 26, 2020, 12:29:52 PM
This happened to me as well with the self-adhesive tape. Scary part is I don’t know how.


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