Why does spark plug gap vary?

[Unstock240]

The manual says to set spark gap from .28-.32 when exactly would you need the minimum or the maximum? I've just been going with .30 since its in the middle of recommended spec.

 

[xjma]

It's kinda like tire pressure, a range of values work, and depending on what you want to do, higher or lower could be better for your application.

 

[Unstock240]

Makes sense, just wondering what factors change it. Like probably fuel compression coil a bunch of things. I just wonder how you know what are the right settings. Spark gap is probably hardly noticeable when changed so little.

 

[Smith121]

my 1999 blaster keeps bogging down and will back fire and die could this be the reason?

 

[Awk08]

oregandunes swears by .18 gap, says easier starting and less fouling i believe
both my bikes start 1-2 kicks, and have only ever fouled 1 plug in over 10 years of blasters, or i'd try it to see

 

[bagds101]

i always gap mine to 30.

 

[Deerslayer89]

All my new plugs are .030 so i go with it