I was just wondering if anyone has one installed yet? I would like to hear how it works.
I would like to give my machine a little more low end punch and clean up the top end. I am going to a 12 tooth CS sprocket, but I will be adding 22" rear tires, which will offset the gearing change. I am waiting on my Pro-Tec rear skid to see if I will have clearnce for a 42 tooth rear sprocket.
I dont want to make mine any louder if I can help it (those of you with pipes could post audio files that would be helpful). I removed my spark arrestor and it was too loud for me. I need to lower the gearing to take some of the step out of the 1-2 shift, I seem to be wanting 1 1/2 gear all the time, the mid range hit is awesome but I think that if it could be made to pull too the limiter in 4-5 gear then the 12-42 gearing would not hurt top speed.
See Ya Drew

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I haven't installed my Sparks Adv. yet, so I can't help you with that. However if taking out the spark arrestor was too loud for you DON'T GET AN AFTERMARKET EXHAUST. It's as loud or usually louder than that. I have an FMF and it's slightly louder than with just the spark arrestor removed. Later

 

i also havent installed the key yet, but will probably wait until i find the right pipe, cam,and filter so i can properly jet it the first time.as far as using the 42t sprocket just remove both rear bolts and shim between skid and axle with 2 flat washers on each bolt.can't wait for them extra hp add-ons,iam 41 and still like to fly along with them modded bansheeees.love that raptor.