Metal plug cap covers.

[RGP750]

Hi all
I know back in the 70's we all threw away the metal plug cap covers so please don't shout at me.
I'm considering making a batch if i can borrow an original as a master.
Anyone out there can lend me a good /bad or plain ugly one i can take dimensions from?.
Cheers

[UK Pete]

You can still buy them, hardly worth the bother in making them
pete

[RGP750]

Hi Pete
Didn't know you could buy them ,that squashed that idea then.
Who sells them?
cheers Rich

[UK Pete]

Here you Rich, this is what i think your talking about
pete
http://www.ebay.co.uk/itm/Honda-CB-750-Four-Zundkerzen-Stecker-Set-Zundkerzenstecker-ignition-caps-new-/250891765149?pt=DE_Motorradteile&hash=item3a6a50859d

[JamesH]

So which model of cb750 were these fitted to guys? Enlighten me pls :-)?

[LesterPiglet]

Over £91 for caps!
I think they were fitted to all 70,s bikes, my Kwak triple certainly had them. Bloody crap in the rain.

[steff750]

Lester wrote

I think they were fitted to all 70,s bikes, my Kwak triple certainly had them. Bloody crap in the rain.

yes they are still crap in the rain mine sounds like a MiG welder arcing out I know they was fitted for all the UK bike market and the kraut ones by the looks of it    they are on my 1970 CB750k0 and and was on my 1972 CB250k2 I don't know exactly when they stopped .but as you say we all throw them away anyway

[Bryanj]

When i was doing it part of the PDI was to rip off the tin bits on all models

[tom400f]

I have exactly these fitted as original on my 400F

[Bitsa (Ralph Wright - RIP)]

Same with Bryan when riders complained off mis firing etc the tins came off no problems then
Cheers
Bitsa

[UK Pete]

just found some cheaper
http://www.ebay.co.uk/itm/200680428725?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

[Johnwebley]

Why oh why would someone want to put back one of the worst things that Honda ever fitted. Like Bryan and Bitsa it was one of the first things we removed, even if the owner wasn't complaining about a misfire. Truly, truly awful things, you couldn't touch any part of the leads or caps when it rained, or you'd get an almighty electric shock. It was so bad that I ended up wrapping insulation tape all the way down from the coils to the plug caps just to stop the arcing.

For the sake of humanity stop this madness before it catches on.

I agree,original is not always the best,unless the bikes are going to be Concourse standard show bikes that have no engine internals
and never get ridden

[AshimotoK0]

Around 1969 the H1 Kawasaki was fitted with the first CDI which evidently interfered with TV's as the bike rode past.
The metal cover was probably intended to eliminate the RFI created when the plug sparks (the internal resistor in the plug cap reduces this too). The manufacturer's were probably more bothered about eliminating RFI than they  were preventing their bikes cutting out in wet weather !!!

[LesterPiglet]

Around 1969 the H1 Kawasaki was fitted with the first CDI which evidently interfered with TV's as the bike rode past.
The metal cover was probably intended to eliminate the RFI created when the plug sparks (the internal resistor in the plug cap reduces this too). The manufacturer's were probably more bothered about eliminating RFI than they  were preventing their bikes cutting out in wet weather !!!

This is the reason I believed those metal contraptions existed. I didn't give a sh1t if your TV buzzzed when I zoomed past. 

[AshimotoK0]

Around 1969 the H1 Kawasaki was fitted with the first CDI which evidently interfered with TV's as the bike rode past.
The metal cover was probably intended to eliminate the RFI created when the plug sparks (the internal resistor in the plug cap reduces this too). The manufacturer's were probably more bothered about eliminating RFI than they  were preventing their bikes cutting out in wet weather !!!

This is the reason I believed those metal contraptions existed. I didn't give a sh1t if your TV buzzzed when I zoomed past. 

I know, in the late 70's I worked for a large company and it was all doom and gloom about redundancies and everyone was moping around doing nothing but look miserable. I though boll***s to this and gainfully employed myself for a week designing and building a CDI system for my 1st 400/4. It basically inverted the 12v to 400 VDC, then charged a  0.5uF capacitor to 400v and discharged this using a thyristor   across the coil each time the standard contact breaker operated. It took a bit of perfecting though, the first attempt nearly blew up the silencer when it misfired!  It ran great for the next 20k miles (apart from 1 capacitor failure - these were the type used in old Pye valve colour TV sets and I uprated from 600v, to 1,000v type, as they did in the TV design). It was still fitted when I sold it (in the tool tray ) and the original points still looked like new. BUT -  god knows what the RFI was like!!  and yes I did not have the crappy tin covers on. Wonder if its still fitted, as the bike is still out there and was licensed last time I checked XDN128R. I can still hear those twin inverters, 1 for each coil, singing together now!