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sandnmyteeth2
02-08-2005, 10:17 PM
Looking into getting a sparks timing advance. Anybody using one of these and what do you think of it? My only mods. are a K&N filter and a FMF Powercore 4 and no lid on the air box. Will I need a jet kit when I advance the timing? THANKS Shawn
eagertorace
02-09-2005, 01:53 PM
Originally posted by sandnmyteeth2
Looking into getting a sparks timing advance. Anybody using one of these and what do you think of it? My only mods. are a K&N filter and a FMF Powercore 4 and no lid on the air box. Will I need a jet kit when I advance the timing? THANKS Shawn

you should have already rejetted for the mods that you have,
i installed the advance key in mine and can't tell any difference, i think it's because i done one mod at a time.
sandnmyteeth2
02-09-2005, 04:01 PM
Yes it was jetted when the pipe and filter was installed. Will I have to jet again? Thanks
cals400ex
02-09-2005, 04:03 PM
you shouldn't have to rejet again, given your where it needs to be now. the timing key will make the throttle feel more crisp, not necessarily increase power.
sandnmyteeth2
02-09-2005, 06:23 PM
Cool! Thanks I would like to hear more opinions about these. thanks
400exrider707
02-09-2005, 07:26 PM
Well it will run hotter so it couldn't hurt to be a tad on the rich side to help cool it a little better or maybe run a step up in octane of gas.
cals400ex
02-09-2005, 09:39 PM
also, when you go to adjust your valves, the top dead center mark (T) on the flywheel will be off by a little bit.
Metzroth
02-10-2005, 07:28 PM
not trying to hyjack your thread just that im looking into one of these too. Does anyone have anything good at all to say about it?
Quadworks
02-10-2005, 07:39 PM
I have the key in mine. I love it!! I also have the lid off and jetted.
muddy400EX
02-10-2005, 09:06 PM
do they really make that much of a difference?:confused:
Quadworks
02-11-2005, 05:34 AM
There is a differance. But I think most of my increase was when I removed the airbox lid and rejetted at the same time. $15-20 for a little more power and another mod, I think it is worth it. I have never noticed mine running any hotter like some want to say it does.
400exnac
02-14-2005, 04:09 PM
are they simple to install
Metzroth
02-14-2005, 05:15 PM
from what i read in the tech article about installing it seems pretty simple.