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I looked in my clutch tuning book and see that on my 09 153" M8 with a SLP stage III with MDS weights with the shorter bolt in the tips and a stock secondary with a 36 degree helix and stock orange spring.
I ended up liking the Speedwerx H5 120/310 spring the best of the many I tried. The sled was pulling 8,200 while climbing and clutch engagement is 3,600 RPM after I added two engagement washers. I started with the 125/340 but, I always get a low end bog with that primary spring regardless of what I try.
I wonder how close this set up might work on the new 2015?
I see I tried the 1.507" clutch offset and really liked it. That's probably not even close on the Proclimb but, it shows I really need a service manual for this sled.
I hear you Kiliki, you have me rethinking it again.
I sure do like their stage III setup I have on my M8. That sucker absolutely rips!
Question, is there a measured period of diminished performance on these new Arctic Cat sleds when new? I know the new Skidoos take something like 2 tank fulls or X amount of hours for the ECU to allow full power output.