Need opinions of SLP stage 5 performance kit.

[jmag215]

Looking at picking up a 2015 with 350 miles and a SLP stage 5 kit. I have a guy claiming he has heard of major issues with them. Can anyone let me know there experience with them please.

 

[lilindy500]

500 miles last winter on my stage 5 and no issues. I'm running the high comp head at 1800feet mixing in some race gas.

 

[Old Scud-doo]

Looking at picking up a 2015 with 350 miles and a SLP stage 5 kit. I have a guy claiming he has heard of major issues with them. Can anyone let me know there experience with them please.

Problems with the Polaris 800 motor or SLP kit?

Ha! Just kidding. I had some issues with a Stage III. I put it on after 1100 miles and kept fouling plugs and not running. Found out the pistons were knifing and the rings were chipped. I think the SLP kit needs everything to be in great working order for it to work properly. The motor isn't that finicky when stock. Ran good after I had a new top end put in. So if you do it, just make sure your pistons and rings are still in great shape and if you start having issues like I was, rebuild her. Good luck.

 

[rydningen]

Anyone else had /heard of problems with the stage 4/5?

I am about to pull the trigger on a used stage 4 kit, which is the same as 5 except pcv over bullydog, so any i input is of great interest.

 

[800poodragon]

Have about 1500 miles on a stage 4 on my 2012. Runs great.

 

[SRXSRULE]

guy I ride with has a 13 with the full SLP set-up. My stock 14 would walk right by him climbing. He had been struggling with it for 2 years, and tried many different things to fix it. It just never makes good power.

Also ran into 2 guys on the hill, one had a 12 with the SLP stage 3 and he thought it ran great, until it was ran against a well clutch good running stocker. stock sled outclimbed him, held constant RPM and had more track speed.

The last few years it seems like its easier to make these sleds run worse then it does make them run better (non-boosted, of course).

Eric

 

[Sheetmetalfab]

guy I ride with has a 13 with the full SLP set-up. My stock 14 would walk right by him climbing. He had been struggling with it for 2 years, and tried many different things to fix it. It just never makes good power.

Also ran into 2 guys on the hill, one had a 12 with the SLP stage 3 and he thought it ran great, until it was ran against a well clutch good running stocker. stock sled outclimbed him, held constant RPM and had more track speed.

The last few years it seems like its easier to make these sleds run worse then it does make them run better (non-boosted, of course).

Eric

Stock setup with proper piston to cylinder clearance.
Runs strong.

 

[rydningen]

Hmm, this makes me think twice about the stage 4.

I have run a stage 3 previously on a 11 for three seasons, this sled ran great but the map was to rich for my elevation when it came from SLP, when I pulled some fuel things changed alot.

But going for a ported cylinder like the stage 4 and 5 is something totally different than this, I imagine.

Clutching is mentioned several times above, I had to change the clutching compared to what SLP supplied, any chance this might be the a part of what some guys have experienced?

 

[cascadesnowjunky]

Slp builds for the masses so there fueling is on the conservative side. I have been around a couple pros with the stage 3 and was not impressed. I had a dragon in 09 and put an slp pipe setup on it and there map was way way to rich. I was able to get it to run good but it took me taking a bunch of fuel away. I am not bashing Slp so I hope nobody takes this wrong, they build quality stuff. They are to the point they sell so much they run there fueling on the rich side to keep from burning machines down, it only takes a couple burn downs and there reputation goes down the drain. I think if you are able to fine tune the fuel a guy could really make there setup run. My opinion is for what it costs to run the stage 5 it's not worth the money though. A good rider on a stock sled will walk all over a mediocre rider on a modded sled every time.

 

[Reddragon800]

Im running the MTNTK full mod kit on my 2012 pro. It is night and day the difference in power. The cost is les then the SLP kit and makes a real 21 hp. They also use the bullydog tuner which is more advanced then the Dynojet. I rode with a guy that has the stage 4 and he wasn't even close to my sled!! You could smell the unburnt fuel from that sled. I was soo rich. im sure if the fueling was fixed it might of pulled harder, but like a few guys said, the stockers were out climbing him. He was not impressed!

 

[mountainhorse]

From what I've seen...the SLP Stage-5 uses the BullyDog tuner.
http://slp.cc/catalog.cfm?pageID=detail&catalogID=3&catID=81&productID=2717

One thing last year, that MAY have been an issue in some early kit production... was that V-Force (Moto-Tassinari) changed their reed-petal (same reed-block is used) spec on the V-Force-3R reeds when people were having issues... even on stock sleds... I ran the 3R's without issue, but I had a set from later in the season. I've heard it was only on a very small batch of 3R's that were sold early in the year, last year.

Much of the "success" and "failure" has to do with installation and tuning...or an externality outside of the kit, not related to the installation.

One person raves about their kit from mfg-X and another complains that it did not perform well... most of the time, neither are stretching the truth... but their individual result was a result of a that particular installation on THEIR sled.

Especially anything with a "tuner box" on it... if the customer can change the fuel and/or ignition settings for that engine... you often times will hear of a poor running engine, which often gets blamed as "I didn't like my kit" kind of response.

Depending on the condition of a persons injectors (dirty or clean), the condition of the fuel filter, the fuel (and treatments) they are using, if the injectors and fuel pump and/or regulator are within spec...or what end of that spec they are on (higher pressure or lower pressure) can have one sled running "rich" or "lean" and have to be tweaked... or in some cases, have a defective part replaced.

I fixed a buds 2014 800-PRO-RMK last year that had a defective fuel pressure regulator (FPR).. That FPR allowed the rail pressure at the injectors to be 61.5 lbs and the sled always felt rich. I replaced his entire Pump/Flange-assembly (PFA) with the one from my sled for the weekend... which ran dead on at the specified 4-Bar (58 psi) and it ran like it should.... Although this is not common.. it is an example of what can happen in different sleds.

Now, don't get me wrong... someone could have installed it just right, and did everything right... and a kit from MTNTK, SLP etc did not perform to expectations... and it's a mystery. I've seen the same thing on a sled that spent most of a season trying to get worked out... even a couple STOCK sleds here and there throughout the years that was bought back by the factory (all brands) when they could not figure out what was going on.

 

[Reg2view]

If you're serious about getting results from an improved motor, crank runout, and phase checking is essential as part of the build. And it's typically the difference between the average or poor OOB stocker, and the 'ringer' that just runs outstanding. High output 2s's just magnify the impact. No magic, just physics. These mass produced pinned cranks can be out of phase by a degree or more sometimes.

 

[AdrenalineAddict]

The only problem I've seen is deto on pump gas even at elevation. It looks as though everyone who runs the kit needs a wee bit more octane than what SLP claims. I also have not seen any pull a well tuned stocker although that could be a rider/tuner issue. I'd personally love to play with one but I like my warranty. Every 2,200 to 2,600 miles I get a new top end for $50, that's about $6,000 over four years.

 

[800poodragon]

with my stage 4 I did adjust my fuel a bit. I also have never been able to get SLP clutching to work for me. Use my own clutching. Have not had a stock sled keep up with it on the flat or a hill yet. Mine is not tuned perfectly as I would prefer to error on the safer side but it runs well. Used to always have to change to 2 gram lighter weights for the week we go to Cooke City, last 2 years been using the 2 gram heavier weights with everything else the same in the clutch. Run 8350 at over 10,000 feet consistently.
The only issue I have had was the fuel filter. I run 1 ounce of oil (using Redline)per gallon of gas mixed in the tank and also lucas per SLP recommendations. Seems like when I run a tank or two of race gas instead of lucas mixed in the fuel, within a couple of weeks my filter starts clogging up. I have cut the filters open and checked them seems like there is a parafin wax in them. Cannot even blow thru them. Does not matter how new they are. I converted to the big car filter...easy to change and can check quickly if needed for 10.00 each.