I’ve been fighting to get this kit to work. Stock rpm was at 7450. After rvs kit was installed and power vision 3 rpm at 6950 and it feels gutless compared to stock. RVs sent me replacement springs. Secondary spring with no locking tab on it. Didn’t make any difference. Do I just go back to stock clutching? Or am I missing something?
Must be some issue with the weights or spring being out of spec, or the tuning is not matched to your mods. Get 10-15 min of data logs with your tuner and Email Ryan back with your concerns and he can look at your tune logs and see what is going on.
Just wondering what kit you would recommend, for a 2020 sportsman 850 touring with a mbrp slip on exhaust, 30 inch tires and a dynojet power series belt ? Thanks.
So if you go with more shims to get the higher stall will that affect how smoothly you can takeoff? Will it be more jerky? I am going to be running 27 inch tires and want it to wheelie pretty good but also ride my son around so I don’t want it to be to jerky taking off
Looks to be all in the clutching. If you look at the RPMs you will see that the RVS does not start to gain RPS until the clutch starts to get in to overdrive. (Maybe a 2 stage spring) In my opinion the RPMs should be at maximum throughout the run. Maximum belt squeeze and maximum RPM.
So the spring for the engagement is in the front clutch? Well I need to contact you to buy another spring or something I bought a 4 wheeler that has an EPI mudder clutch and the engagement is way too high for my liking. Also what’s the purpose of the secondary spring? Belt clamping or something?
Larry Curci I just had all 4 screws that hold the helix on break off leaving me stranded after doing this clutch kit exactly as you did in this video. I used blue loctite. What loctite did you use? I have very little time on the machine with the clutch kit.
What would be needed to try to get back to stock torque when putting 29.5 outlaw mud tires on a polaris sportsman 450? Would i need a gear reduction or a clutch kit?
Did my clutch Thursday night, and went out to clean up the shop on Friday morning, and what do I find on the bench,,,, that stupid plastic bushing from the 2 min mark,,, so back apart it comes....
Have you had much problems with temps and belt life on the scrambler 1000’s? The ol man has one with 27” zillas and any time spent under hard load blows belts.
I have an 2013 850 scrambler with 26x8x14 26x10x14 tires...i noticed this customer went up to 27's with the clutch kit. If i go with 27's do i need a clutch kit or would i be ok with stock clutching?
Well. I think I just killed my motor... You didn't say to never turn the primary clockwise. It tore up my timing. Now I get to bring it to the shop. Great.
hey man, nice vid thanks. I'm curious what clutching I should run on my stock 850 scrambler with 29.5 terminators. Also, I found a chunk missing on the primary clutch cover plate.. Bike runs and shifts fine.. How can I replace it without buying a whole new assembly?
Nice.....mine feels rock solid at 52 so I know it can do more. 3 inch lift with 28" tires and 1.5 spacers all the way around. I am just worried about the rpms, do these engines hold up well at those speeds?
shadams911 yes, they hold up great. They have the same motor the rzr does, just have the throttle and rpm electronically limited to reduce the performance. We remove those and change many other parameters in the ecu tune to allow it to run like it can.
I also have a question on these shims, so from my understanding you're saying with both shims in my machine won't move until I'm around 2400 rpm? I have a 2018 and it idles at 1250. And would you recommend no shims 1 or both. My typical riding style would be mud, mostly water and trails. No racing.
Hi Ryan, So at around 1:20, I see you took off the face plate on the Primary Clutch to access the spring and weights without taking off the clutch itself. Is there a lot of pressure from the spring on the Primary Clutch? Can this also be done on a 2017 Polaris Sportsman 570 EPS? I like the fact of not needing a clutch puller and just changing the spring and weights on the Primary Clutch while it's still on the bike.
Got my answer from RVS Performance :) I don't have to take off the Primary Clutch to replace the spring and weights so follow the same procedure as in the video!!
Thank you RVSPerformance. Yes the entire install was very smooth and the Performance Gain is well worth the $ spent. I ended up using just the thin shim and can do wheelies in Low Gear (Happy Grin on Face).
Is that 800 a twin cylinder and if it's a single cylinder do they make a 800 big bore kit to fit my 570 sportsman? Thank you for the video bud it was very informative.Keep up the good work.
Will this give a noticeable difference in engagement without raising rpm, stock engagement is too soft for me. It feels like the belt is slipping when I pin it from a stop, just kind of a boggy feel off the line.
Any word on when these SPI Slip-on exhaust will be shipping ?? I ordered one a month ago & no word as of yet ?? ANd when I call, I hear is, "Next Week" ??
I'll have to look at your order and see what's going on. I don't believe we have any orders more than about 2 weeks old and when you placed it we were told 2 weeks before they would be shipping from the manufacturer. I'll look tomorrow and call you with an update.
I'm confused on the engagement does want the engagement at a lower rpm or a higher rpm?? like say you just put the springs in without the shims will the clutches engage faster or slower??
Great video. I have 2010 550 xp and wanting to Run an aggressive 28-30 inch tire for mud. What kit do you recommend and would the installment be similar to this? I know you said they're a little different as far as how the springs are compressed
Stock engagement on all year 850s is about 1800. The weight and spring combination in the primary controls peak rpm as well so you won't lose any on top either. In fact most of the QSC kits give a couple hundred more rpm to get you closer to the top of the peak rpm power band.
You can order directly from our web site at RVSperformance.com or you can call and order over the phone at 651-500-0657 8-6 central time Mon-Sat. These kits are custom built for each machine, mods, and use and are in stock ready to ship.
Good video. I would trash that rapid reaction secondary clutch and get a team 3 secondary clutch, which gives you the ability to swap out the helix and will give you partial engine braking. You can pick a good used one off of Ebay for $75.
