'06 Mod Sleds
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What's it takes to get ready for race day?

Our '06 Mod Sleds. 

Here are a few pictures of one of our '06 600 HO IQ's.  This sled is using a completely stock 600 HO with Stock 38mm Rack Mikunis, the Stock Airbox and the Stock 440 Pipe and Muffler.  All of the stock DET and Temp sensors are used with this motor.  This motor is mounted low in the chassis using the 440 straps and no spacers or shims.  The sled it clutched with  Heel Clickers @ about 61 grams on the Toe and 3 grams on the Heal.  The Secondary is running the stock 440 Helix with the Red/Black spring.  Jetting is pretty lean and depends on Density Altitude but ranges from about 340 on cold days to 290 on warm days.  Sled runs premium fuel mixed @ 32:1 with Polaris Racing Synthetic.  The case was modified per Polaris Racing Bulletin to allow premix to get to the center bearings and water pump shaft.  This sled is much than a 440, it is very easy on fuel and makes a great practice as well as race sled.

 


Here are some pictures of one of our Mod 600Ho Sleds.  This sled is using a modified 600HO with the DET and Temp sensor in tact.  This motor has Ported Cylinders, Shaved Head, 38 Mikunis bored to 41mm, Larry Rugland Motorsports Twin Pipes.  This sled is also using the stock airbox.  This motor is mounted low in the chassis using the 440 straps and no spacers or shims.  The sled it clutched with  Heel Clickers @ about 63 grams on the Toe and 4 grams on the Heal.  The Secondary is running the stock 440 Helix with the Red/Black spring.  Jetting is pretty lean and depends on Density Altitude but ranges from about 370 on cold days to 310 on warm days.  Sled runs Citgo 112 (107 motor octane) fuel mixed @ 32:1 with Polaris Racing Synthetic.  The case was modified per Polaris Racing Bulletin to allow premix to get to the center bearings and water pump shaft.

 


Here are some pictures of another of our Mod 600Ho Sleds.  This is a Polaris Factory Mod purchased through the Race Department.  This motor is mounted using the supplied spacers and shims under the motor and straps.  This motor is not using the DET or Temp sensors and the exhaust valve actuators are plugged.   This motor has the SLP Billet Head inserts and stock porting, and is using the SLP Twin Pipes. This motor is using the Stock 38mm Mikunis and Kick Ass air filters.    The sled it clutched with S58H weights and the Almond /Red spring.  The Secondary is running the Mod strait angle Helix with the Red/Black spring.  Jetting is pretty lean and depends on Density Altitude but ranges from about 360 on cold days to 300 on warm days.  Sled runs Citgo 112 (107 motor octane) fuel mixed @ 32:1 with Polaris Racing Synthetic.  The case was modified per Polaris Racing Bulletin to allow premix to get to the center bearings and water pump shaft.


Here are some pictures of another '06 600Ho Mod Sled that is set up for trail use.  This is a Polaris Factory Mod purchased through the Race Department.  This motor is mounted using the supplied spacers and shims under the motor and straps.  This motor is not using the DET or Temp sensors and the exhaust valve actuators are plugged.   This motor has the SLP Billet Head inserts and stock porting, and is using the SLP Twin Pipes. This motor is using the Stock 38mm Mikunis and Kick Ass air filters.    The sled it clutched with S58H weights and the Almond /Red spring.  The Secondary is running the Mod strait angle Helix with the Red/Black spring.  Jetting is pretty rich and depends on Density Altitude but ranges from about 420 on cold days to 360 on warm days.  Sled runs Citgo 112 (107 motor octane) fuel.   This motor is oil injected  and has a Wicked Racing 9 gallon fuel tank from Jay Jay.


And last but not least here is our 600 HO Mod Sled with the Larry Rugland Motorsports full mod motor.  This motor was built by LRM using the 440 bottom end with 600 HO cyls and all of Larry's tricks.  It has an LRM Billet Head, Porting and LRM Twin Pipes.  This motor is utilizing a remapped 440 CDI with the 440 style exhaust valve solenoids. This motor Dyno'd at 148.6 HP@8800 RPM in a fairly rich state of tune.  This motor is mounted low in the chassis using the 440 straps and no spacers or shims.  The sled it clutched with S58H weights and the Almond/Red spring.  The Secondary is running the stock 440 Helix with the Red/Black spring.  Jetting is pretty lean and depends on Density Altitude but ranges from about 400 on cold days to 350on warm days.  Sled runs Citgo 112 (107 motor octane) fuel mixed @ 32:1 with Polaris Racing Synthetic.  The case was modified per Polaris Racing Bulletin to allow premix to get to the center bearings and water pump shaft.  

Pictures of the LRM Mod to come


Larry Rugland Motorsports Pipes

Here are some pictures of what the LRM Pipes look like installed on a 600 HO while still using the stock headlight and hood.  When we installed the first set of LRM Twins it appeared Larry had tucked the pipes low enough in the chassis to enable us to keep the headlight and brake cooling duct in place with just a little modification.  We used a heat gun and warmed the Black Plastic intake plenum to just about the melting point, then pressed it down on the pipes to form to the correct shape.  We did the same thing with the cowling where the cooling holes above the right hand shock come down and touched the pipes.  After we got the cowling and plenum shaped like we wanted it we put on Aluminum Heat Tape to minimize any more melting from the hot pipe.  This was a Race sled so we did a pretty fast slopy job and if you took your time it would come out much better.  After the first race weekend the plenum melted in quite a bit more but it did not do any real damage.  This sled was run for about 2 months like this and after nothing melted any more after the first week or so.

First day of installation.

After two months of racing.

The above pictures show how the intake plenum melted quite a bit more and even distorted the headlight pod just a little, it got no worse than this.  The plenum pictures look much worse than it really is but you can see that the headlight did distort just a little.  You can also see on the cowling where it melted just a little by the cooling vents, this we melted with the heat gun and it never got any worse. 

Below are a few other pictures showing how the cowling and side panels meet perfectly together and one shot of a little distorted tub plastic above the right shock.  The tub distortion is more because the pipe came loose during a nasty crash and the racer kept racing after he got back on.  So far this is not hapening to our other LRM piped sleds.  We built a small saddle bracket to support the outside pipe and keep them off the tub.

The LRM Twins fit into a nice outlet flange that come with the set.  This flange bolts or rivets onto a piece of thin aluminum (owner supplied) that covers the Stock 440 muffler outlet.  And essentially the LRM Twins exit the tub in the same location as the 440 muffler, no cutting any additional holes in the tub.

We put the first set of LRM Twins on a completely stock 600HO.  This was on a sled that we were first running the 440 pipe on.  The LRM Twins made a moderate but noticeable gain in HP over the 440 Pipe but the gain was above 8000RPM.  There was no noticable loss in any RPM but the gains were noticed in the upper RPM's.  The stock 600 HO with LRM Twins was about even with the 600/440pipe sled till about 300' then the twin pipe motor would start pulling it pretty good.  I would estimate a 7-10 HP gain over the 440 pipe at the upper RPM's.  I am quite sure these LRM Twins will work on much larger CC motors than just a 600, they will probably work on motors up to 685 or even 700 cc's.  They may not be absolutely perfect for squeezing every last HP out of the bigger motors but they will work very good, IMO.

I feel that if you wanted to add the LRM Twins to a trail sled, if you took your time with the hood and intake plenum modifications and added lots of reflective heat tape your sled would come out better than our race sleds.  The headlight and brake cooling would be in tact and you could have one awesome sled that would sound like no other.  Send me an e-mail if you have any questions.

 

Check back soon, we plan on keeping you informed of the things that will keep you and your sled at the head of the pack.
 

 

 

Team AK Racing Wasilla, Alaska 99654 907 354-4619 info@akracing.com