R
RKT
Well-known member
After several outings in the DEEP powder at an average of 8,000ft elevation, we have begun working on the performance of the new Pro RMK..
We have a stock XP, at Stock Cat, a Big Bore XP and a Big Bore Cat (800) in the stable to do real comparisions. However, until the Pro is tuned in to run at its full potential, it would be pointless to do any comparisions to ANY other sleds!
The new Pro out of the box is NOT running to its potenial, even after the chip burns out ,which is at 3 hours per inside information from Polaris.
So, after 3 hours, the ECU is allowing for full running power. The crank is beginning to loosen up and the rings, hopefully, have taken a good seat and mated to the cylinder walls.
First of all.. let me say that this is a good sled.. The chassis is nice, running boards stay clean and the handling is very good..
1)The shocks need stiffer springs in the front and rear if you are over 200 lbs.. and the steering has some up and down play... but, the chassis works well.
2)The clutching has some issues.. Until you get the sled running its proper rpms, you can not gauge the performance. With the stock clutching, the rpms will not hold in the steep and deep. There is major RPM fluctuations and peak rpms is never reached nor held.
The belt slip is very bad and this translates into major belt heat and loss of performance.
So, IMO, the 1st thing to address is this clutching issue.
1st. There needs to be some cold air coming into the clutching area, the hot air is trapped and needs to escape. We did a little air flow mod and it seemed to help.. but it needs more. We will work more on this this week. But this is not the sole reason behind the hot clutches. Many like to put too much value on the venting, while it is important and is a player, the clutch calibration is also a major player in the heat.
2nd.. The secondary set up is simply not correct for deep powder hill pulling. It works pretty good on poached tracks, hard packed, and flat ground running, BUT, on the fresh powder, steep hill pulling it is way off.
We did some changes and got this issues much, much , better, we have very consistent rpms but are still low on the rpms. They are holding steady now so, we just need to fine tune in the peak operating rpm calibration. This should be easy and be completed for the next ride.
So, that is what we know , so far.. After we get this sled's clutching fixed, we will work on getting the engine to produce some more power.
Kelsey
We have a stock XP, at Stock Cat, a Big Bore XP and a Big Bore Cat (800) in the stable to do real comparisions. However, until the Pro is tuned in to run at its full potential, it would be pointless to do any comparisions to ANY other sleds!
The new Pro out of the box is NOT running to its potenial, even after the chip burns out ,which is at 3 hours per inside information from Polaris.
So, after 3 hours, the ECU is allowing for full running power. The crank is beginning to loosen up and the rings, hopefully, have taken a good seat and mated to the cylinder walls.
First of all.. let me say that this is a good sled.. The chassis is nice, running boards stay clean and the handling is very good..
1)The shocks need stiffer springs in the front and rear if you are over 200 lbs.. and the steering has some up and down play... but, the chassis works well.
2)The clutching has some issues.. Until you get the sled running its proper rpms, you can not gauge the performance. With the stock clutching, the rpms will not hold in the steep and deep. There is major RPM fluctuations and peak rpms is never reached nor held.
The belt slip is very bad and this translates into major belt heat and loss of performance.
So, IMO, the 1st thing to address is this clutching issue.
1st. There needs to be some cold air coming into the clutching area, the hot air is trapped and needs to escape. We did a little air flow mod and it seemed to help.. but it needs more. We will work more on this this week. But this is not the sole reason behind the hot clutches. Many like to put too much value on the venting, while it is important and is a player, the clutch calibration is also a major player in the heat.
2nd.. The secondary set up is simply not correct for deep powder hill pulling. It works pretty good on poached tracks, hard packed, and flat ground running, BUT, on the fresh powder, steep hill pulling it is way off.
We did some changes and got this issues much, much , better, we have very consistent rpms but are still low on the rpms. They are holding steady now so, we just need to fine tune in the peak operating rpm calibration. This should be easy and be completed for the next ride.
So, that is what we know , so far.. After we get this sled's clutching fixed, we will work on getting the engine to produce some more power.
Kelsey
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