How to Pick the Right spark plug

GoldenMotor.com

wrx2bike

New Member
Oct 31, 2010
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california
Hi good people. Im trying to figure out exactly what type of plug I need for my 80 cc motor.. any suggestions on how to tell what one to get ?
 

Venice Motor Bikes

Custom Builder / Dealer/Los Angeles
Mar 20, 2008
7,266
1,797
113
Los Angeles, CA.
It's all about using a plug with the correct heat range!
I use NGK B6HS in the summer (colder plug) & B5HS in the winter (hotter plug).

If the plug is too hot?, it can cause pre-ignition; & if it's too cold?, it can foul with unburned gas & oil.

For someone like Baird who runs a heavily modified engine (that will run hotter), he would have to use a colder plug to prevent pre-ignition. ;)