Spark Plug query

The GS takes 4x B8ES plugs. When I bought a set recently they were
labelled BR8ES and when I queried this I was told they that the R
stood for 'resistor' and that I should just unscrew it from the end.
The 'It' that was indicated was the aluminium (?) 'nipple' that always
used to be on plugs used in different vehicles which one either kept
or threw away depending on ones plug lead types. No way is this a
resistor!

When I queried what the 'resistor' was for I was told that it was to
compensate (?) for the carbon fibre plug leads that are now commonly
used instead of copper and affected plug current and therefore timing.

Being an electronic engineer I know at least some of the foregoing is
hogwash - but am not sure how much is true of the plug architecture.
*Is* there perhaps an internal resistor on 'R' types or what?

Does it matter on the GS?
For further, but irrelevant here, info on this plug change (and
application for OMF number) see later message in UKRM.

Chris D

 

BP8ES sounds like an NGK plug. The "R" would mean resistor.
Most likely you already have the appropriate resistance in
the wire/cap assemblys.

You generally have a hard time buying non-resistor plugs at an
auto parts store but they should be readily available at any
motorcycle shop.

If you're really stuck with an autoparts store, ask them to cross-match
the NGK number. My local autozone was able to cross-match the NGK
number to Nippon-Denso and one other make of plug which they had in
stock.

If it''s really such a PITA, buy some extras on-line ahead of time.

 

Dont buy champs they suck bad. For bikes.

 

Agreed - always had trouble for about 40 years...


Thanks to all contributions so far. The nett result is that bike seems
fine with new plugs - whether or not there is another resistor in the
plug lead already. I suspect not.

Cheers

Chris D

 

Interesting information, which is may not be applicable to most
motorcycles, unless they are equipped with a radio from the factory. Do
Gold Wings have shielded wires?

Automobiles constructed of metal wouldn't need shielded ignition wires
but the last time I looked, Corvettes had shielded ignition systems.

 

Yes they do...............

????????????????????????

Make it simple; shielding and resistor plugs keeps form messing up grannys
tv. Or pappys radio.. lol
Ever hear a wine come thru your radio in a car. And hear it change when you
rev it up. alternator noise. so called.
In the time of less cable. people would snow on thier tele. (RFI) is another
form of polution. So we have shielding and resistor plugs.. etc.... Just
like ilegal CB's coming over everything. lol

More Info
http://www.nightrider.com/biketech/spkplghnbook.htm#Today's

http://www.ngkntk.co.uk/technicaltips/resistorplugs.asp

http://www.championsparkplugs.com/sparkplug411.asp?
kw=Resistor&mfid=2

http://www.bosch.com.au/content/language1/html/2265.htm

Hope this clears thing for you, and helps
Be Safe.

 

There's an RFI capacitor on my truck's alternator, but there is no
capacitor on my motorcycles' excited field alternators.

 

It's easy to think that an automobile will act as a Faraday cage and
trap any emitted RF inside of it, particularly given that radio
reception is hindered by the vehicle. However, an automobile is not a
perfect Faraday cage (after all, you can use you cell phone inside the
car, and the engine compartment is open on the bottom!), and high
voltage equipment like ignition systems put out junk that's pretty hard
to shield against once it's emitted.

Furthermore, while older automobiles wouldn't have been affected by the
EMI, more modern ones have all sorts of computer/electronic equipment
(fuel injection, ABS, electronic speedometer and other instruments,
etc.) that is sensitive to EMI. None of that stuff is cheap, and failure
is problematic for both the vehicle and individuals in the vicinity.

There was recently a discussion on a web forum that I read about
allowing cell-phone use on aircraft. Lots of people just don't seem to
understand the potential for interference with electronic equipment or
the costs involved in preventing such interference in an environment
full of transmitters. It's far cheaper and easier to simply prevent the
transmissions in the first place.

--
Later,
John



'indiana' is a 'nolnn' and 'hoosier' is a 'solkk'. Indiana doesn't solkk.