503 clutch setup
Dialed In
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I am running 180 on my (PTO) side and 170 on the (MAG)side
As far as Elevation I was doing my tests at 3500 to 4000
I finally had time to spend the day doing nothing but clutching.
So here goes: This is for the 503f.
Artic Cat secondary, 45 degree helix with the Artic Cat Red spring/white stripe.
Primary, P-85, with a Thunder shift kit, running a polaris dark blue spring with white stripe (tension on this spring is 120/310)
If you read this above on this tread you will know what all has gone on.
I have to say the below is the ticket if you have a 503f and are looking for a performance mod. Clutching on the 503f is the main perfomance mod and oh you can get so much when you do this.
I have had the primary apart 6 times today, going for a run, coming back to the trailer, tweaking the weights on each arm, putting it back together and then going for a run again.
The final end result is as follows.
Clutch engagment RPM: 3750
Top End RPM: 7230
Weight Hole #1 = 3.5g
Weight Hole #2 = 3.9g
Weight Hole #3 = 5.2g
Weight of Arm = 37.6g
Total Weight (Arm and Weights in each hole) = 50.10g
I experimented across the board and this is by far my best combination. I was very consistent in each run. Same hills steep spots and straightways.
It's all about getting the right weight placement on each arm that is for sure. Just a .5g weight movment from hole #2 to hole #3 makes a huge difference.
I know those that follow thru and do the above will love it.
I spent basically 2 months trying different combinations.
If you are not running an Artic Cat Secondary, don't bother going to a P-85. Go with the Artic Cat secondary as your first step, this will offer you the biggest gains up front, then if you so decide go with the P-85 and the thundershift kit. I do not reccomend the P-85 with out the Thundershift kit, you can do so much with the kit and the gains it offers are so worth it.
Harley