sparks key with high comp.

[enduro400rider]

i was thinking about puting in a sparks key while im doin my motor. i have heard people say its fine with high compression pistons and some say no. its a 11:1 wiseco 406 piston will it hurt??. thanks

[cals400ex]

my buddy runs it in his 416 without any problems.

[Silverfox@C&DRacing]

I have it in my 416 you will just have to take precautions because the key will make the bike run hotter so make sure you run a 9sparkplug and get some airscoops.