SOHC.co.uk Forums > CB500/550

coils

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florence:
Do these coils work with points?  How much do they cost?

I like the look of them, it might be what I need on mine.  Whenever it rains my bike splutters along on about two cylinders until the heat from the engine dries out the wires, usually about three miles.   Very annoying.

matthewmosse:
I'd start with new plug caps if rain is causing spluttering. I think the coils in the pictures are ones for a boyer system, as I understand it boyer do several systems, I have a set that use the standard points but I think there are systems that replace the coils as well (basically electronic coils which are smaller and reconed to be better), I don't think the 2 types are interchangeable. Points coils are different ohmage or something. Coils from most points 12 volt bikes should work on 500's

florence:
Thanks Matthew, I will try that.  At the moment I have the whole lot covered, and I mean covered, with grease which improves it a little but maybe it is time for a new set of plug caps.  The main thing which has delayed me in this is the fact that one of the leads is rather short.  I need to find a long cap that will fit.  The other thing is I normally just put up with these problems until they become completely unbearable.

Recently, I managed to make enough room in my workshop to put my bike inside at night.  This seems to help a lot but strangeley the lichen growth on the frame is slowing down.  Poor lichens. :)

Back in the winter a friend who doesn't know me too well saw my bike outside my house.  He said; "Wow, I didn't know you had a bike, do you think you'll ever get it back on the road?"  I had not long come back from the shops on it.  He was amazed to discover that the engine was in fact still warm.  Leave all that polishing to those who enjoy it I say.

Sorry, I'm drifting.



 

Yoshi823:
I had a bad experience of plug caps back when I was riding in all weather commuting to Navy college. On my CB125s back in 1975 I had one of those metal shrouded caps that I didn't realise was the original. I can remember riding along the A2 on my way into college one morning, & when I put the indicators on in the pouring rain the bike staggered & jerked in unison. I tried the coil, the plug etc...because I didn't know any better. But one day I was reading Motorcycle Mechanics about a new range of plug caps from NGK which were waterproof...& for the sake of pennies compared to the cost of coils etc the bad weather problem was cured.

matthewmosse:
I have had 2 bikes in a row recently stagger to a halt with wet / old plug cap syndrome in even the mildest drizzle. I now have a small can of Wd40 as a standard part of the toolkit and new plug caps on the bike. My bikes also live outside these days and that's something I really must do something about, I used to keep them under a really basic tarp tent style shed supported on fenceposts and even that helped keep things like plug caps functioning well.

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