Sled Rebuild

[crazycart]

Well the 500 LC's arent very fast to start with, about 90 MPH sleds. The 650 will do 110+ with good hardpack conditions.And it looks like sleeper til ya fire it up, them triples sound awesome.Its got 96 studs, but needs more because of the power.

For summerizing we usually do that or spray marine storing spay into the carbs and down the plug holes. Also run it dry.

 

[Kenny_McCormic]

snowmobiles are so fun. Want to know a real sleeper snowmobile. Our 85 ski doo MX 470 LC. Some how, stock set up, keeps up and or passes my aunts 98 polaris 500 LC. Has not been re-built it in a long time. the primary has a odd noise but we feel if it aint broke dont fix it.

On another note how do you "summerize" or store your sleds? we always run seafoam or stai-bil through like 5 gallons and run the carbs completely dry. Us personally have never had any problems.

Carbs should be left full of treated gas so should the tank if metal, Spray some WD40 down the plugholes so it doesn't seize up.

 

[2or3wheels]

we had the sleds sittin for 2-3 years and they didnt sieze.

 

[crazycart]

I left the one im rebuilding out for 1 winter without 1 of the carbs on and it seized.

 

[crazycart]

Pics of the engine mocked up, just need gaskets.

 

[newrider3]

My friend said he just got in a new pipe, Fox shocks, and a turbo for his sled. I believe it's a Polaris Triple. Yes, I said turbo.

 

[Kenny_McCormic]

Turboing a 2 stroke is pretty close to pointless.

 

[Russ2251]

Turboing a 2 stroke is pretty close to pointless.

Yeah, kinda'.
Added weight just makes it a wash.

 

[crazycart]

Turboing a 2 stroke is pretty close to pointless.

You sir, are completely wrong.

Turboing a 2 stoke makes INSANE horsepower. But of course, is very hard to tune. Usually not necessary unless mountain climbing or drag racing, because its very complicated and expensive to set up. It may seem like it would be pointless on a 2 stroke, but it makes ridiculous power.

 

[Kenny_McCormic]

Huge tuning issue from blowing fuel out the EX port, way more power adders beofre a turbo.

 

[crazycart]

The thing is, the intake and exhaust ports aren't exactly in line, and with the powervalves on modern 2 strokes, it works. There isn't a better power adder than this, horse power can be increased by 45-50%. And that's big numbers when you have a sled that's running 175hp stock.

 

[Kenny_McCormic]

Power valve, I learned something today!

 

[newrider3]

Well I pulled the ol "pics or STFU", and it looks like he wasn't lying. Not a Polaris though.

 

[crazycart]

ITS ALIVE!!! The engine runs. 1 step closer.

 

[crazycart]

Short clip - http://s141.photobucket.com/albums/r52/squirrellrancher/?action=view&current=10-25-08_1718.flv

 

[Kenny_McCormic]

I wish I still had that 650. Dad just had to get rid of it before I got the cash around to rebuild it(and he gave it away at that). This thing was ****ing sweet, 650 3 cylinder liquid cooled fuel injected 2 stroke with studed track, a Polaris indy IIRC. Dealer wanted $200 for the piston it needed.

 

[crazycart]

That would be a Polaris RXL. Same as the one i have, just with fuel injection. These had 44mm intakes too. My dad had 3 of them. Fast sleds.

 

[Kenny_McCormic]

LOL engine strapped to table, WIMP!

 

[jr dragster T]

LOL engine strapped to table, WIMP!

Lol nothing like using your foot on the head, That's all ya need.

 

[crazycart]

A twin cylinder 38 horse a bit more than a little 5 horse..the thing shakes the strap loose lol...