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Polaris: Pro-Ride 2010 and up, all models in the Pro-Ride chassis
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Old 03-26-2019, 12:56 PM
Kachess1 Kachess1 is offline
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Default Four-stroke Pro's

Built 2 more naturally aspirated four-stoke Pro's this year and have a winter's worth of riding on all three. Have $2500 to $3000 into each of them since we all already had RX1 motors to donate. Reasonably simple swap. No machining, simple wire feed welding. Fortunately cheap clean Pro's with blown motors are easy to come by. We have them on 2016, 2014, and 2011 chassis's and they run head-to head with their 2-stroke brothers. My 2016 RMK 457# before, 469# after swap. Motors have anywhere from 5k to 14k miles on them but all run strong/identical. Next step is anti-ratchets: have to run tracks crazy tight. Fuel injected; improve running on steep downhill carves. Try a 163in Track. Very fun!

Here's riding in McCall last week. https://youtu.be/9y4tFI1D03Y
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  #2  
Old 03-26-2019, 05:21 PM
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So what motors are you putting in them? Pretty neat to see someone doing something different from the crowd.

About the only real drawback I can see on that is when you get stuck, you probably don't want to get that 4 stroke on its top.

I usually end up with my sled upside down to get it unstuck at least a couple of times every ride.
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Old 03-26-2019, 05:40 PM
Kachess1 Kachess1 is offline
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We typically roll our sleds out of stucks at least a couple times per ride. The RX1/apex motor has a dry sump so most of the oil sits in a reservoir. The little oil in the crankcase can run out the breather tube into the airbox when upside down. Only good thing about our carb versions is they shut off when they go upside down so we don't toast motors. We can roll out 3 or 4 times and not go low on oil. I have installed a solenoid valve on the breather before but feared it might malfunction and I don't want to build crankcase pressure. Been rolling them out for 15 years. A little oil out the belly pan once in a while is not a big deal.
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Old 03-30-2019, 02:24 PM
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Way cool. Congrats on some fine builds. They do sound awesome and if the weight penalty is only around 10-12lbs, kudos for a good quality build.

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Old 04-01-2019, 10:42 AM
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Turbo any of them? How is the handling compared to a stock Pro? I found the Apex to be very heavy front handling.
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Old 04-04-2019, 05:56 PM
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We've ridden lightened RX-1's 159's (less 80 lbs from stock) for years and have been able to make them go most anywhere. The yami motor in the pro chassis is another 60lbs lighter and massively more maneuverable. We are still learning what they can do. They're super easy to lay over, can hang a crazy steep sidehill and downhill carve like nothing we've ridden. The video has some sidehilling. Unfortunately none of have experience with stock pros. Our chassis's had blown motors. I guess our next step will be to let an experienced pro rider run them side by side.
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Old 04-04-2019, 06:59 PM
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Quote:
Originally Posted by Kachess1 View Post
We typically roll our sleds out of stucks at least a couple times per ride. The RX1/apex motor has a dry sump so most of the oil sits in a reservoir. The little oil in the crankcase can run out the breather tube into the airbox when upside down. Only good thing about our carb versions is they shut off when they go upside down so we don't toast motors. We can roll out 3 or 4 times and not go low on oil. I have installed a solenoid valve on the breather before but feared it might malfunction and I don't want to build crankcase pressure. Been rolling them out for 15 years. A little oil out the belly pan once in a while is not a big deal.
I know an old boy that has that oil loss issue fixed. Send me a PM and I’ll give you his number.
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Old 04-07-2019, 01:13 PM
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Thanks for the tip. As far as Turbo's in any or them, not yet. There is plenty of room alongside the motor but I'm thinking the Apex fuel injected motor is a better candidate. We messed with MCX and Bender rear mounts on our RX1's but they added a lot of weight and we had to constantly fiddle with them. Another summer project will be seeing if we can get the Apex fuel injection rails to fit. Clearance between the motor and the steering link is pretty tight.
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Old 04-07-2019, 03:03 PM
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Originally Posted by Kachess1 View Post
Thanks for the tip. As far as Turbo's in any or them, not yet. There is plenty of room alongside the motor but I'm thinking the Apex fuel injected motor is a better candidate. We messed with MCX and Bender rear mounts on our RX1's but they added a lot of weight and we had to constantly fiddle with them. Another summer project will be seeing if we can get the Apex fuel injection rails to fit. Clearance between the motor and the steering link is pretty tight.
The gent I sent contact info on, can help you in the turbo dept also.
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Old 05-24-2019, 11:05 PM
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Old 05-25-2019, 05:06 AM
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Old 05-26-2019, 09:55 AM
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Old 05-26-2019, 11:19 AM
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Old 05-26-2019, 11:50 AM
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Old 05-29-2019, 04:43 AM
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