spark plug caps

joken120 · Post by **joken120** » Fri Aug 20, 2010 10:03 am

Hi guys, I've just bought a set of spark plug caps for my CB77 off ebay. They are the ones currently doing the rounds with the Hm logo on the top. thing is I can't seem to find a way of fitting them on, as there are no inbuilt threaded screws to screw into the inner copper core of the HT lead as on all the previous caps I've used. However, I have noticed a brass needle type thingy coming up from where the cap connects to the plug. I did'nt want to start turning things with a screwdriver in case I break something. Has anyone fitted any of these before ? any help appreciated. thanks...

jensen · Post by **jensen** » Fri Aug 20, 2010 12:18 pm

Hi,

Are these the original ones, or the after market ones ?

Jensen

joken120 · Post by **joken120** » Fri Aug 20, 2010 1:20 pm

I really don't know Jensen. Here's a photo.

joken120 · Post by **joken120** » Fri Aug 20, 2010 1:32 pm

Jensen, I've just checked the ad on ebay and it says they are NOS Honda.

jensen · Post by **jensen** » Fri Aug 20, 2010 4:01 pm

Hi,

I have a few old ones lying around (not nos but used), and these are original. I will look for them tomorrow and see how these are attached to the cable, The pictures included are made by me a few months ago, please compare them with your own. These are attached to a early type coil for a type dream. I compared these plugs with the ebay caps, and I'm afraid that yours are a (good) copy. the original caps are made from different plastic (Bakelite) very fragile, and the logo is above the material of the cap. These caps also are on C71's and C76, and 1960 / 1961 CB72's

Jensen

jensen · Post by **jensen** » Sun Aug 22, 2010 9:57 am

Hi,

There are pins in mine too, those pins secure the cable very good. The original caps have a pin which you screw into the cable with an angle of 90 degree's (via the part witch is on the plug's).

This way of securing works very good, it secures the cable, and puncture the cable n the right place.
Never try to turn them from the cable, the pin will bend and cannot be removed again, also the thread inside the cap is very, very delicate (plastic, hot, dry).

These plugs belong only to the very early CB72's, 1960 and 1961. I have never seen them on CB77's, and I guess that these were not used on them, but I can be wrong here, because in 1962 (end of year) Honda introduced other caps. The first CB77 was introduced in 1961 (at least in the US). In Europe we had to wait a little longer, probably until 1965 / 1966. But the CB450 K0 came in 1965, so the CB77's didn't sell here because of that.

Jensen

joken120 · Post by **joken120** » Sun Aug 22, 2010 2:20 pm

Thanks Jensen, I had a sneaking suspicion there would be something like that in there but I didn't want to chance it in case the whole thing just shattered. ....thanks for your help.