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Pat M

Jan 23, 2014 - 5:55PM

Spark Plugs

Is an NGK B5ES spark plug OK to use for long runs?

Thanks in advance.

Pat

email (option): sacombsashtrees@hotmail.com

Ian Wright

Jan 23, 2014 - 6:32PM

Re: Spark Plugs

Iron or Alloy head?....I use Champion plugs myself..An L86C for the iron head and an N5C for the alloy one...I've done long and short runs with both types without any problems....Ian ...

email (option): ian@wright52.plus.com

Pat M

Jan 23, 2014 - 6:47PM

Re: Spark Plugs

Thanks Ian; it is an iron head.

By the way, I have never understood "hot" plugs and "cold" plugs. Hot plugs for "hot" engines?????

email (option): sacombsashtrees@hotmail.com

Ian Clare

Jan 23, 2014 - 7:32PM

Re: Spark Plugs

You need a cold plug for a hot engine and hot plug for a cold engine. A cold plug has a short insulator to get rid of heat as quick as possible ie a sports motor or one that tends to run hot like a sidevalve. A hot plug has a long insulator to hold on to heat to help burn of oil and or other deposits. Not used that much today unless you have an older motor. Years ago when I ran a Vincent outfit in London I used N8 plugs to stop fouling, but had to remember to change back to N5 plugs if I went on a run as the N8s would overheat.

email (option): iandot clare1at virgin dotnet

Rob Miller

Jan 23, 2014 - 11:25PM

Re: Spark Plugs

I thought the "E" ment long reach, if your Iron head is on an M20 you need a B_HS short reach plug.

Rob

email (option): robmiller11(at)yahoo.co.uk

Noam Zehavi

Jan 24, 2014 - 2:59PM

Re: Spark Plugs

I think that Champion L86C is the best fit. (C represents a Copper core)
With other sparkplugs, mostly MGK, it seems like the motor is more "choked",
and you cannot "stretch" gears as much as with the "champion".

Currently I use an old Champion L10, the predecessor of the L86C,
I think it is from the 40's, strange looking and short ceramic insulator,
With a nut to fasten the HT lead by hand.
it works great.

Noam.

email (option): noam10@gmail.com

Stuart Gibbins

Jan 24, 2014 - 9:03PM

Re: Spark Plugs

New plug for the run up to Conwy Pat?

Stuart

Jeff Dennis

Jan 24, 2014 - 9:44PM

Re: Spark Plugs

I use the NGK B6HS cooler,I do not like using plugs on the hot side,can burn a hole in piston etc,bike runs perfectly on the B6HS,iron head has the short reach plug H not E

Pat M

Jan 26, 2014 - 8:09AM

Re: Spark Plugs

Hi Stuart

Yes. Really splashing out and purchasing a spare plug!

What next? Probably put some air in the tyres!

See you there.

Regards

Pat

email (option): sacombsashtrees@hotmail.com