I bought a Dyna CDI for my Arctic Cat 650 and I`m really not that happy with it. I rejetted to larger main jets (128`s) also. My friend has a bone stock Arctic Cat 650 and I can beat him off the line easy enough, but after a few hundred feet he is able to catch up to me in the midrange and actually pass me! Top end is identical for both, there is absolutely no gain in top speed....NONE. I thought this CDI was supposed to have a higher timing advance and at least give me an edge beyond the initial take off. Am I missing something? This CDI does not impress me at all!!!

 

What did it cost in Canadian speak??

 

Why did you jet up? The website says this is not needed. All you are doing is killing your mid and top end. I see you're in Sask....what elev? Prolly around 2600'? You need to jet DOWN, not up. Better yet, replace that restrictive air intake with something that flows better THEN jet up.

 

I jetted up because I was told by the seller that I would probably see a decrease in performance if I didn`t jet up. Elevation 1900`