Spark plugs

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Spark plugs

Post by qcnr on Mon Apr 15, 2013 12:02 pm

My knowledge of why and how to do with engines is limited, but just wondering, after changing them at
the weekend. Why 2 spark plugs per cylinder? Honda XL600V.
I am also very glad the original tool roll was still in its place, as this contained a sparkplug tool.
Impossible without,plus having to dismantle half the bike... Laughing
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Re: Spark plugs

Post by Bill (the boss) on Tue Apr 16, 2013 12:45 am

High performance engines like 2 plugs per cylinder and 4 valves!

Bollocks I cant stop this!
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Re: Spark plugs

Post by lwt big cheese on Tue Apr 16, 2013 1:07 am

Fashion for the plugs.

Valves let more stuff in and then more stuff out when revving hard.
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Re: Spark plugs

Post by Bill (the boss) on Wed Apr 17, 2013 3:29 pm

I disagree re fashion for the plugs. Twin plugs give a much better burn for the mixture and promote a even temp in the combustion chamber. 4 Valves allow the engine to rev higher as the individual valves are lighter and take a ot less force to open and close, so you can use a quick rise ramp on the cams.

Bollocks I cant stop this!
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Re: Spark plugs

Post by Alan H on Sun May 05, 2013 4:20 am

Big head.


The bike, not the rider!!
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Re: Spark plugs

Post by qcnr on Mon May 06, 2013 2:37 am

True
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Re: Spark plugs

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