I'm about halfway through the break in on the Matryx Slash 850 - but doing some short 3 second WOT pulls, the sled didnt feel as strong as my old 800. Looked at the RPM and it was maxing at 7400 or so on trail. Is this to be expected with the additional fueling/oiling caused by the ECU? I pulled over and checked deflection, that wasnt the issue. Going to check throttle cable today when I go through everything - anything else I should look into?
Lower Max RPM to be expected during break in?
- Thread starter Teej83
- Start date
Were you riding full speed on the trail or just punching the throttle to see the spike in rpm? Also what altitude?
I optioned it with high altitude clutching - so should be correct unless Polaris dropped ball on that. Was at 10-11k feet
I was running between 40-45 on trail with a few spikes above that. Was on trail when I held the throttle down for a few seconds but was focused on max rpm not max speed. Max rpm stopped climbing after a couple of seconds at around 7400
I was running between 40-45 on trail with a few spikes above that. Was on trail when I held the throttle down for a few seconds but was focused on max rpm not max speed. Max rpm stopped climbing after a couple of seconds at around 7400
Both the rentals we rode were a little low the first hundred miles.
Black spots on the snow and all.
Solid with a few more miles on them now.
Black spots on the snow and all.
Solid with a few more miles on them now.
Maybe check the primary spring? My 2020 khaos went bad the first season and my wife’s 2021 went bad last season. Replaced with slp blue pink good to go. Shouldn’t be an issue that new but sounds like same symptoms
They didn’t break, just sacked out when they compress you could see they were starting to rub spider.
They didn’t break, just sacked out when they compress you could see they were starting to rub spider.
What weights in clutch? 7400 is LOW and not fun. my 850 at 10,000'needs 64. if going to 11,000 plus may need 62.
Yeah, the 'high elevation" option comes with 68's on 850s. which they def are not pulling over 10k in break-in. 66s maybe would work. 10k+ riding area 64s may be in order.
Definitely worth checking.
They run a little low on RPM during breakin but not 600-700 RPM low.
Definitely worth checking.
They run a little low on RPM during breakin but not 600-700 RPM low.
Wheelhouse was right - they are 68’s.
S
snobyrd
Well-known member
Chris, you didnt ride today ?
I think you have something wrong with your clutching. I was pulling full RPM on non-prem and chewing good. Lots of smoke but engine was running good at WOT
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Sent from my iPhone using Tapatalk
No was feeling a bit run down so took a day to rest before a busy work week.
S
snobyrd
Well-known member
Gettin old r we???
This would explain why your RPM is low at that elevation.
And as mentioned above but to reiterate, 850 RMK's all come with 68's unless you get a sea level option. But don't quote me on that.
And as mentioned above but to reiterate, 850 RMK's all come with 68's unless you get a sea level option. But don't quote me on that.
Lighten up 2 or possibly 4 grams and give your primary spring a good look. I had a new primary spring break last season in the first 10 miles it was ridden.
It sure feels like in 2022, adjustable clutch weights on stock sleds would be appropriate. As WHM posted there is a Polaris published need to change weights based on riding zone already. Since every aftermarket clutch kit has adjustable weights of some variety, OEMs should evolve and offer this adjustability from the factory.
Primary spring looked fine - no major issues visually apparent (although what would I look for)?. It did have 68’s so I swapped 64’s in. Gonna order some slp adjustables. Will take it out this weekend and see if there is any improvement
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