Polaris Assault top speed????

Clinracing118 · Jan 28, 2010

A guy i ride with have a 09 Polaris Assault 800 with a series 5.1 (2.4" x 146") track. We do lots of river and lake riding but we don't have that much snow this year. Last weekend we went for a ride on a river and their was a guy with a 10 Polaris Dragon RMK 155" completely stock with us. The RMK was at least 10 mph faster than the Assault and it have a longer track. We check and they seem to have the same setup as far as clutch and gearing except the Assault have 1 tooth bigger on the top sprocket. Their was also two 2010 Polaris Assault with us (one with the stock track and the other one with a Camoplast Cobra 1.375" track) and they were also slower than the RMK. Is their something different with those Assault compare to the RMK??? Also I tried the 09 Assault and the low end is good until around 50 mph and it fall flat after that. The guy just bought the sled and he is not really happy about it. The RPM is always around 8200-8300. What can be done to gain some top speed on those Assault??? They don't expect to go 100mph with that but it should at least do 85mph. Any help will be appreciated. Thanks

Braaap12 · Jan 28, 2010

I belive the assaults are geared lower

milehighassassin · Jan 28, 2010

Stock 2009 Assault is 20-41 gearing.

2.05 gear ratio

8,000 RPM it should pull 84 MPH track speed.

ElectroTech · Jan 29, 2010

Run a 64/44 .46 helix the other angle will be 64/42 .46 you will pick up some speed.

LT · Jan 31, 2010

with compete stock setup(stock motor/clutching/track) my speedos max mph was at 83 i believe. im not sure how accurate those speedos are. now with a 62/42 .46 helix..some mtx weights...slp exhaust set up and cobra track speedo max shows 95

milehighassassin · Jan 31, 2010

LT said:
with compete stock setup(stock motor/clutching/track) my speedos max mph was at 83 i believe. im not sure how accurate those speedos are. now with a 62/42 .46 helix..some mtx weights...slp exhaust set up and cobra track speedo max shows 95

That doesn't make any sense. Your max speed shouldn't change from a weight and helix change, unless you were unable to pull the weights you had on there before.

The only way to change your max speed is to change the gearing or track drivers.

PolarisJustin · Jan 31, 2010

my sleds all stock with 260 miles and ive had mine up 86 on the lake according to the digital speedo with a passenger, snow was semi hard packed it was reving 8250-8300rpm

Rick! · Jan 31, 2010

The Assault track is made for putting screws in it and running hillclimbs. It has no top speed and will throw those big lugs off when you try run rivers and ditches. It also has straight rails instead of the tipped rails which also takes away some speed. If you want to run fast in the flats, put a wide front on a regular RMK, clutch it heavy and tape the throttle until a lug hits you in the elbow and then back off just a little.

tukernater · Jan 31, 2010

milehighassassin said:
That doesn't make any sense. Your max speed shouldn't change from a weight and helix change, unless you were unable to pull the weights you had on there before.

The only way to change your max speed is to change the gearing or track drivers.

you can get speed by clutching :face-icon-small-hap

milehighassassin · Jan 31, 2010

tukernater said:
you can get speed by clutching :face-icon-small-hap

Care to explain? You are limited by the gearing...

Clinracing118 · Jan 31, 2010

The 09 Assault doesn't have the original track anymore he have the same track as the RMK except in a 146" instead of a 155". Thanks

polaris_guy13 · Jan 31, 2010

Approach Angle

The Assault has a steeper track approach angle which results in more acceleration and take off speed but less top end speed. The dragon has the shallower approach angle which allows more top speed in theory.

polaris_guy13 · Jan 31, 2010

milehighassassin said:
Care to explain? You are limited by the gearing...

You are limited by gearing, but if you are not getting full shift-out on your clutches with the stock setup it will be slower then a different setup that may get the full shift-out.

AndrettiDog · Jan 31, 2010

polaris_guy13 said:
You are limited by gearing, but if you are not getting full shift-out on your clutches with the stock setup it will be slower then a different setup that may get the full shift-out.

You're referring to efficiency of the clutch setup. What mile is saying is that with ideal efficiency the only way to gain speed is to change your gearing.

polaris_guy13 · Jan 31, 2010

BugIto said:
You're referring to efficiency of the clutch setup. What mile is saying is that with ideal efficiency the only way to gain speed is to change your gearing.

Sorry about that I misunderstood the question. Gearing is the only way to gain top end. :face-icon-small-hap

Do you agree that the track approach angle is a big speed killer in the Assault compared to the Dragon?

milehighassassin · Feb 1, 2010

Yes, I am saying and assuming your clutches are running in the correct efficency.

IF your clutching is screwed up, nothing will help you.

AndrettiDog · Feb 1, 2010

IF your clutching is screwed up, nothing will help you.

Terminal velocity will.

milehighassassin · Feb 1, 2010

BugIto said:
Terminal velocity will.

When this baby hits 88 miles per hour, you're gonna see some serious ****

metallicat · Feb 2, 2010

milehighassassin said:
When this baby hits 88 miles per hour, you're gonna see some serious ****

But you might be riding a 1971 sled when you stop to take a leak then......:face-icon-small-hap

Great scott!!

toy_ota64 · Feb 8, 2010

09 assualt

Got the engine recall done.... now it back fires and Pisses around.... Can only get around 66 mph in the powder and only hits around 7800 rpm.... Only thing done is put heavier weights in the clutch.... how can i get more speed ... its no fun seeing everyones tail lights.... makes me wanna buy a doo..

Polaris Assault top speed????

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