So you're tired of your sled gathering dust all
summer long. Your better half keeps catching you during late night
sound effect races in the shop. Why not take that sled out and hit
the lakes....ahem, that's right, your sled on the water. It's
called IWA Watercross, and it isn't as hard as you think. Then
again, it does take some practice.
It's actually very easy to transform your sled,
and prepare it for the water. Most of the gear, like a Snell 95 or
better helmet, tether cord, MX style pants/jersey, you probably
already have. The only additional items required are a 20'+ length
of 1/2" rope, a buoy, and a life jacket.
A couple of quick sled mods, are to silicon the
gaps in the belly pan, bulkhead, and tunnel. Additionally,
switching over to pre-mix, and removing your oil injection tank,
is simple, and keeps things lighter, and environmentally friendly.
This is the simple start, keep reading for some additional easy
mods.
Though it might seem unnatural, the snowmobile,
and water are a great match. Basically running on the theory of a
hypersonic paddle boat, sleds can really haul on the water. When
you factor in the speed of those 1.25" lugs on a track, there's a
definite potential for propulsion. Of course, there will be a need
for you to put your sled on a diet.
Lightening up your machine is probably one of the
single most important steps in getting it ready for IWA
Watercross. Ixnay that seat, along with it's matching jumbo fuel
tank. The stand-up posture required to maneuver the sled, often
has people installing a variety of custom foot pegs. The short
duration of the races also let's racers get by with only a 1.5
gallon tanks.
Just the seat and tank alone, drastically increase
your power to weight ratio. We've only just begun, and you're
already getting closer to hydroplane status. Dropping down from
the top of the tunnel to the underside, you'll need to dive into
some front shock mods. The attitude of the IWA Watercross sled is
key to getting yourself up on plane (on top of the water). To
achieve this, your front shock needs to be lengthened around 2",
and your spring pre-load needs to be rock hard. This stance keeps
the track well below the tunnel at all times, and keeps the skis
up. This exposes the greatest amount of track surface area to the
water, and gives you greater propulsion. Oh, and don't worry about
the rock hard suspension, the water is your suspension now.
Heading aft of your track, you'll need to address
the snow-flap's travel. This can really help to control your
buoyancy. Straight-line drag racers will free up the flap to
minimize its drag, while the oval racers opt to limit its travel.
Limiting the flaps travel helps the flap behave much like an
external trim tab on a boat. This added leverage helps in a
variety of ways, but mainly coming out of the corners, it gets the
machine back up on top of the water.
Now that we've covered getting your power to the
water, we'll migrate to the front of the machine on how to control
it. A narrow, shortened travel front suspension is the ticket
here. Unlike on the snow, your skis don't do you much good on the
water. Mainly, their outrigger positioning is utilized when a IWA
Watercross machine is going straight and level. Skimming across
the water, they provide additional lateral stability....but in the
corners, it's an entirely different story. Speaking with
experienced oval racers, there's a fine line when cornering on the
water. The majority of your steering is achieved in body
positioning. The skis, and the possibility of hooking one, are
actually more in the way than anything.
Mastering your body English is utilized to even a
greater extent on the water, than the snow. Racer progression
normally starts out in the drag racing forum. There, people become
accustomed to the shore launches, transitioning to the water, and
mastering straight line control. Once they're ready to move
on, the challenge of turning can be tackled. Described as a cross
between the standup Jet Ski, and slalom water skiing, turning a
sled on water is almost an artistic balance. Logging handlebar
time here is key. There is no replacement for experience here.
Keeping you safe, while your build your water
time, you'll need a couple of added accessories. The first, and
most important, is a life preserver which is rated for 100 mph.
This is sure to keep you floating, even if your machine doesn't.
Once they get you out of the water, the on-site safety crew will
turn its attention towards your machine. To aid in retrieving it,
you are required to have that earlier mentioned rope of at least
1/2" diameter, and at least 20-30 feet long. Attached to the end
of the rope should be a floatable buoy. Most racers simply tie a
marine rated throwable seat cushion to the rope, once the decision
to bail has been reached, they rip the rope/cushion free, and let
go.
After suffering an inevitable sinking, there is
obviously some general maintenance to perform. Yanking the
sparkplugs and pumping out the water, checking carbs, drying
clutches, etc. For those who are ecologically concerned about
sinking sleds in lakes, they should know a few facts.
Biodegradable lubes are used, and for the most part, when a sled
goes down, it's all about the water rushing in, and not pollutants
rushing out. These racers even are conscientious enough to
thoroughly inspect their machines to prevent the spread of Milfoil
weed. After all, they want the lakes to stay healthy, so they can
race another day.
Though the sport of IWA Watercross is as
competitive as any other form of racing, one thing is for sure,
the racers are one big helpful family. It's a common occurrence to
see competitors swarm around a racer having mechanical woes. The
teamwork is high, just like the fierce competitive spirit. There
is also a never ending will to help fellow sledders setup and get
started in the sport. You can easily get your sled "converted" in
an afternoon of wrenching.
Watching IWA Watercross is a hoot, and racing it
is a RUSH!
Though this is just a quick overview, you can
learn much more by checking out a IWA Watercross event in person.
To find a race near your, hit the IWA website (www.iwausa.org).
Whether racing, or just spectating, you'll never be the same
after a IWA Watercross event.
Contact us
and we can get you in touch with someone who will assist you in
your adventure.
Ken "Jetblast" Thompson