440 and sparks key?

[rideracelivemx7]

i know they say your not suposed to do the key with big bores. yes well us minors arent supsosed to drink either lol waht am i looking at for temperature increases, power increases. has anyone done this with my set up? or close to it? bad or good experience?

[drew416ex]

440's already run a little hotter, then the key will make it run hotter so I wouldnt do it. Sparks could sell you the key and make some money on it, but if they say not to, there has to be a reason which is heat.

yeah i deffinately would not use it in a 440. Dont plan on going past 10:1 compression and the key if you want to run pump gas.