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SOHC.co.uk Forums => CB500/550 => Topic started by: Ashdowner on August 19, 2017, 07:29:39 AM

Title: Plugs and caps
Post by: Ashdowner on August 19, 2017, 07:29:39 AM
My CB550K3 has electronic ignition, DR7ES plugs, but also has 5ohm resistor plug caps? Is that right or should the caps be non-resistor? Does it actually make any difference?
Title: Re: Plugs and caps
Post by: Trigger on August 19, 2017, 07:48:13 AM
I have been informed that all new plug caps are fitted with a resistor so, you need to fit spark plugs with non resistor, D7EA or D8EA work fine with me.
Title: Re: Plugs and caps
Post by: deltarider on August 19, 2017, 08:32:57 AM
Quote
My CB550K3 has electronic ignition, DR7ES plugs, but also has 5ohm resistor plug caps?
What's the history of your bike? What model (for what market?)? What brand plugcaps do you have? Are they the original ones?
Title: Re: Plugs and caps
Post by: JamesH on August 19, 2017, 08:39:37 AM
Fit non resistor plugs as Graham suggests. Cheapest fix as well...
Title: Re: Plugs and caps
Post by: Seabeowner on August 19, 2017, 09:42:59 AM
Always causes discussion this subject. A Delta hinted, different markets (especially earlier models) sported different combinations caps and plugs. Possibly because of regs about RFI. And DSS among others sells DR7ES for all 500/550s I think. (just below the 5k caps). Techis get into length of spark duration/ fuel consumption, starting, plug fouling and the like. The subject always comes up when ignition probs are suspected.
I've used both R caps with and without R plugs and never had a problem. (with electronic ignition and original). But if D7ES are cheaper, get em.
Title: Re: Plugs and caps
Post by: JamesH on August 19, 2017, 12:23:56 PM
Maybe the 550's are less sensitive to this, who knows. I know from bitter experience chasing my tail on 750's that I always now use resistor caps and non resistor plugs.
Title: Re: Plugs and caps
Post by: Nurse Julie on August 19, 2017, 12:37:08 PM
Always causes discussion this subject. A Delta hinted, different markets (especially earlier models) sported different combinations caps and plugs. Possibly because of regs about RFI. And DSS among others sells DR7ES for all 500/550s I think. (just below the 5k caps). Techis get into length of spark duration/ fuel consumption, starting, plug fouling and the like. The subject always comes up when ignition probs are suspected.
I've used both R caps with and without R plugs and never had a problem. (with electronic ignition and original). But if D7ES are cheaper, get em.
Indeed, Mr Sliver does sell the DR8ESL plugs for the 500, the 550 and the 400. I made the mistake of buying these plugs from him and started having problems with my 400. As soon as I ditched the resisted plugs and fitted D8EA's, problem solved.
Title: Re: Plugs and caps
Post by: Norniron on August 19, 2017, 12:45:09 PM
I always thought my 400 was just old and tired but since i started using non resister plugs,its now purring like a kitten.
Thanks Trigg
Title: Re: Plugs and caps
Post by: Trigger on August 19, 2017, 12:51:31 PM
I always thought my 400 was just old and tired but since i started using non resister plugs,its now purring like a kitten.
Thanks Trigg

No worries mate, I will add it to your bill  ;D ;D ;D And before anyone asks, Norniron is running a electric ignition but, it works the same with points  ;)
Title: Re: Plugs and caps
Post by: Nurse Julie on August 19, 2017, 12:55:51 PM
I always thought my 400 was just old and tired but since i started using non resister plugs,its now purring like a kitten.
Thanks Trigg

That is one loud kitten  ;D ;D
Title: Re: Plugs and caps
Post by: Norniron on August 19, 2017, 01:09:42 PM
I would load a video of it but can never figure out how😫😫
Title: Re: Plugs and caps
Post by: hairygit on August 19, 2017, 01:18:43 PM
I would load a video of it but can never figure out how😫😫
I think you need to post the video on youtube, then post a link to it on here.
Title: Re: Plugs and caps
Post by: Moorey on August 19, 2017, 06:11:31 PM
I always thought my 400 was just old and tired but since i started using non resister plugs,its now purring like a kitten.
Thanks Trigg

No worries mate, I will add it to your bill  ;D ;D ;D And before anyone asks, Norniron is running a electric ignition but, it works the same with points  ;)

Who doesn't use a electric ignition. Don't see many hot plugs about these days.  ;) ;D
Title: Re: Plugs and caps
Post by: Nurse Julie on August 19, 2017, 09:04:29 PM
I always thought my 400 was just old and tired but since i started using non resister plugs,its now purring like a kitten.
Thanks Trigg

No worries mate, I will add it to your bill  ;D ;D ;D And before anyone asks, Norniron is running a electric ignition but, it works the same with points  ;)

Who doesn't use a electric ignition. Don't see many hot plugs about these days.  ;) ;D
I have points on most of my bikes, except the CD250 U's where it was standard and the Thundercat.
Title: Re: Plugs and caps
Post by: Moorey on August 19, 2017, 09:42:33 PM
I always thought my 400 was just old and tired but since i started using non resister plugs,its now purring like a kitten.
Thanks Trigg

No worries mate, I will add it to your bill  ;D ;D ;D And before anyone asks, Norniron is running a electric ignition but, it works the same with points  ;)

Who doesn't use a electric ignition. Don't see many hot plugs about these days.  ;) ;D
I have points on most of my bikes, except the CD250 U's where it was standard and the Thundercat.

Just humour all ignitions are electric even those with points.  ;)
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