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2 stroker snowmobile engine in a rzr

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44K views 57 replies 17 participants last post by  Cougarblitz  
C
#1 ·
Hey guys so I see everyone doing Z1 swaps and APEX swaps in RZRs. The problem to me is that these motors are like 5k to buy. I have been around snowmobiles my entire life. I have am wondering if anyone has ever considered swapping in a 2 stroke snowmobile engine into a RZR. You could buy a used 600cc sled that would make about 110-120 hp for like 2-3k and you would have all the wiring, the clutches everything. I am wondering if anyone has done this? I know that 2 strokes you need injection oil but that is not the end of the world. I think it would be sweet to have a 2 stroke RZR, sled engines are very snappy power wise. I am just wondering what all your guys thoughts are? I think the hardest part would be you would need to somehow fab up a custom tuned pipe to fit in the body. It would be nice because the snowmobile engines don't have a lot of extras they for the most part are pretty simple. You have 2 throttle bodies or carbs and some sled have exhaust power valves but you don't have any of the emissions stuff. Plus a 2 stroke rzr would turn heads and sound awesome.
 
#2 ·
IDK how a 2 stroke would handle the weight of the Razr. They definitely aren't that much on low end for the most part. I am sure the clutching on the sled would need a ton of tweaking to work properly in this type of environment. I am not saying it couldn't be done but I am sure it would end up being a "wide open sand type" of ride. A friend and I were talking the other day about what it would take to put a Vmax engine (1200 cc motorcycle) into a Razr and what you would have then. You can pick them up w/ some miles on them for around 2 grand or a little more. Awsome low end and they are shaft drive. Ditch the CVT and fab a shaft straight to the gear box. Don't know about geometry, but if someone could get it to work it would fly.
 
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#3 · (Edited)
I guess I never thought of the low end. There is a big difference between pulling a 450lb sled and a 1000lb rzr. I just thought for the cheaper price it would maybe be a cool option. I do think there would be some challenges with a 2 stroke engine with the tuned pipe which tends to be large.

I don't even know why I think about this stuff. I sold my 02 mustang that was modded out with a fully built motor because I was sick of messing with it, I told my wife that when I get a RZR I am leaving the engine alone but I just watch videos of these swapped machines that fly and think how awesome that would be. I am used to riding snowmobiles and motorcycles too and they both fly and I know my rzr s is not slow but it is not nearly as fast as a sled. funny how a person thinks.

I was just curious to if anyone has done this because it did seem easier to me than the other swaps, the hardest part would be the tuned pipe to me. And no matter the swap clutching tends to be a pain.

I did think that a 2 stroke engine would be less hard on the drivetrain for the reason of the decreased low end torque compared to other engine swaps. I think that they would still offer plenty of power for the average rider. I know some guys have 260hp machines and stuff like that but to me a 2 stroke engine that was say 600-800cc would put out 110-140hp and would more than likely be pretty quick compared to the factory 800cc engine. I think that the 2 stroke engines would get into the RPMs faster making them feel a lot faster than they were if you had them clutched right and would make up for the decreased low end torque. I will have to do some thinking and see if it would be feasible. I don't need tons of power because I don't want to start breaking everything in the drivetrain. And I would like some sort of setup that can still go in mud and water, so I would have to fab up some sort of intake system and make the clutch sealed.
 
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#7 ·
I almost went with a 600 VES sled engine. I decided to go with an Apex swap instead though. After all parts are sold, I'm hoping to be into this for less than $2,000 total. Time will tell.
The 600 VES would be alot easier swap for sure. I found out alot about the Apex swap details, right AFTER I bought a used "donor" sled. I know alot of 800 2 stroker swaps run very well. A 600 VES would not lack low end power at all. The VES takes care of that. Remember, despite being a 4 stroker and all, the 800 Rzr only has 45 to 55 HP MAX.
 
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S
#9 ·
Rzr is heavier but has much less rolling resistance then a sled track packed full of snow. I put a fuel injected 700 sled motor in mine, pipe fit really easy. Clutching I lowered engagement so I can still put around the mountains and still hit 8000 instantly, it was much easier to set up clutch then my turbo 800. It's deffinatly a screamer when you want it to be and controllable when you want to cruise. Mine engages at 2000 rpm. I'd be willing to bet even being a 2 stroke at low rpm it makes more power then a 800 rzr at low rpm. Rzr peaks at 50 ish HP. At 2000 it probly makes 10 so don't let.anyone tell you it won t work or be a all or nothing ride. It's not so. They flat haul ass when you want.
 
#10 ·
I agree about the low end power. Most people don't understand the diff. Between a two stroke and a 4 stroke engine. The only reason the 4 stroke dirt bikes make better low end power than their 2 stroke counterparts is because the 2 strokes they are racing against are 200cc's smaller.
I would check on the laws where you plan to ride I think a 2 stroke RZR in California might cause you trouble.

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S
#17 ·
You wouldn't happen to have a spare starter drive shaft would ya. I broke a starter mount bolt and the flex shaft must have flew into orbit. Local dealer wants 150 which I think is crazy. I rigged one up to work for now but it's not something a guy wants breaking with no back up way to start it. Anybody out there messed with an aero charger on liberty powered sled? I got my turbo back from repair, it use to be on a carb model I'm not sure what controller would work well with it.

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#27 ·
Ya pros and cons with my setup. It's fast, it's sounds good, motor is cheap to rebuild, it's light, motor is small, definitely a very rare swap that not many have done especially in canada, still can turbo to make more power. Cons: it loud , hard on fuel, was lots of work to figure and work out bugs cause there is no kit for it, clutching was a pain in the ass, lots of little things need to be modified to run it like fuel pressure regulator , pump, return line, radiator and stuff like that. All in all I love it cause one of a kind but I'd rather buy a kit from hawk next time cause would be so much easier cause testing has already been done and time is money. Also those z1 motors have so much potential


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