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Spark plugs

Posted: Wed Oct 26, 2011 3:50 pm
by zxrplendermen
Hello everyone,

I've a small issue, im prepairing a race head for my zxr 400.
Next year i'll be running a 70 / 72 BHP setup.

What type of sparkplugs do i need?
And what type of heat range?


Greetz Jan from Holland winks