i own a 440ex and was wondering if anyone has tried the Ignition Advance Key made from SPARKS RACING?
i was just wondering how this really works and how it effects the awsome 400. when i say the effects im talking bout the power and stuff like that.

400exs' ruleeee and im always looking for more power and speed.

2000 400ex
bored out 40 over
rev kit, k&n filter, carb kit, dg racing performance pipe\w header,front sprocket,holeshot tires, renthal handle bars, dg chrome bump., chrome nerfs, sticker kit, and many other accsecories
just dont feel like puttin em all

thanx for your help

 

I'll be putting one in this week (hopefully) and I'll let you know how it goes.

Dennis