Thread: Spark plus
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Old 25-04-23, 03:43 PM   #4
SV650rules
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Location: Shropshire UK
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Default Re: Spark plus

Quote:
Originally Posted by Ruffy View Post
But isn't the easiest way to find out for sure to take a look at the top of your engine and count the plug leads.

Yeah only need to count the ones on front cylinder and X2, I assume they put an equal number in each head

You need to be wary of fake Chinese NGK plugs with mild steel electrodes, Denso also widely faked, so it pays
to buy from a reputable place.



I have fitted Iridium plugs to cars and bikes and happy to leave them in 70,000 miles - the Iridium plug threads
have a special tri-valent coating so that they do not have a tendency to stick to the head material, which
is important when they are in service for a long time, and it works because I had no trouble removing them after
around 70k ( miles ) - considering with normal plugs i was fearful of breaking them after their much shorter useful life was over,

and copious use of penetrating oil, getting the engine hot ( aluminium expands more than steel ) and slowly turning

them back and forth ( quarter turn out, eight turn back ) - spark plug wall is very thin where thread meets main

body, and easily sheared - Oh 5h1t.....




https://youtu.be/vpH4O14EBxA

The plugs for SV650 should be 5Kohm IIRC ( the 'R' in the NGK number is for resistor - but check if your plug caps already have a resistor because 2 resistors kinda foul things up )

Sportsbike shop selling them £15 each, may be cheaper elsewhere ( although that ain't a bad price ), but at least you got the plug number


https://www.sportsbikeshop.co.uk/mot...ent_prod/46521


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Last edited by SV650rules; 26-04-23 at 09:40 AM.
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