2007 Polaris FST Switchback/RMK build

1RMDave · Nov 12, 2011

Well I will start with a list of what I've done and where I'm at currently. I bought the sled with 300 miles on it in January of 07. Up until last year I really only trail rode it, one trip out west changed my riding completely. I no longer ride trails.

Garrett gt2554r turbo running 20 psi
custom exhaust manifold and exhaust/muffler
DevilsOwn water meth kit
Venting from Mountainfit hoods and SLP
Holz a-arms and spindles
Fox Float2's in front
Slydog Powder Hounds
Challenger 151x2
2012 Timbersled Mtn. Tamer
WRP running boards
Fly 4-6" adjustable riser
Fly Handlebar

I think thats most of it, I'll add more if I remember. I've shaved about 40 lbs off it at this point and would still like to remove the headlight and get a light weight battery. Hopefully I'll have skid put in in the next week. Had the big turbo on for last year already, it is MUCH faster than anything else I've ever ridden.

Snow Duck · Nov 13, 2011

looking good!! keep us updated on anthing else done.

knightracer_08 · Nov 13, 2011

That thing is sweet. I didnt realise poo made a 4 stroke, what size is it? Guessing isnt a factory turbo engine? Keep it up interested to see how it works out.

Jonce · Nov 14, 2011

knightracer_08 said:
That thing is sweet. I didnt realise poo made a 4 stroke, what size is it? Guessing isnt a factory turbo engine? Keep it up interested to see how it works out.

Yes, it is a factory turbo from Polaris. Here is the short track version of it http://www.polarisindustries.com/en-us/Snowmobiles/2007Models/Performance/FSTIQ/

knightracer_08 · Nov 14, 2011

ya after I read this I had to go educate myself via google and youtube, those things are cool.

slash · Nov 14, 2011

ok DAVE what are you using for a brake ? I know your stuation was just wondering as its not visable....I have a frend with no right thumb so he has everything put on the left side..I cant even begin to ride it keep pullin the wrong trigger..

1RMDave · Nov 14, 2011

Hey, thanks guys! I know the FST is a bit of a redheaded step child.
The engine is a 750cc turbo factory. Stock is 14 psi on a very small turbo making 140hp. I'd guess I'm at about 220hp now.

I'll update my handlebar pics, I got a brake master cylinder from a victory motorcycle. I'm pretty excited, this will be my first year with brakes!!!

To those that don't know, I have no left hand. I cut it off in a grain auger when I was very young.

slash · Nov 14, 2011

that should work pretty well

Jonce · Nov 14, 2011

1RMDave said:
Hey, thanks guys! I know the FST is a bit of a redheaded step child.
The engine is a 750cc turbo factory. Stock is 14 psi on a very small turbo making 140hp. I'd guess I'm at about 220hp now.

I'll update my handlebar pics, I got a brake master cylinder from a victory motorcycle. I'm pretty excited, this will be my first year with brakes!!!

To those that don't know, I have no left hand. I cut it off in a grain auger when I was very young.

Kudos to you for not letting that get in your way of sledding

Do you have any vids of this sled on the hill?

The FST could've been more and maybe it will be re-invented after Polaris watches the hype play out with the Cats?

Cool build man.

tdbaugha · Nov 14, 2011

I highly doubt polaris is going to revamp the FST. We use it for our Clean Snowmobile Challenge engine and I slowly see Polaris going away from it. It's getting harder and harder to get engine components for it.

Not to hijack, but later in the spring I will post pics of our sled. We have the FST mounted in a 2011 Assault chassis with a short track. Hope to be lighter than 550lbs full of fluids...

1RMDave · Nov 15, 2011

tdbaugha said:
I highly doubt polaris is going to revamp the FST. We use it for our Clean Snowmobile Challenge engine and I slowly see Polaris going away from it. It's getting harder and harder to get engine components for it.

Not to hijack, but later in the spring I will post pics of our sled. We have the FST mounted in a 2011 Assault chassis with a short track. Hope to be lighter than 550lbs full of fluids...

That is awesome, I definately want to see some pics!!! What engine components are you having trouble getting?

1RMDave · Nov 15, 2011

Jonce said:
Kudos to you for not letting that get in your way of sledding

Do you have any vids of this sled on the hill?

The FST could've been more and maybe it will be re-invented after Polaris watches the hype play out with the Cats?

Cool build man.

Thanks, no vids with everything done. At this point I'm building mine to compete with the m1100t.

Boyko · Nov 15, 2011

Neet build Dave, I always wanted to do up a FST. Be cool to see what it does against a 1100t cat

1RMDave · Nov 21, 2011

Thanks! Unfortunately I can't see myself running into any m1100t's.
Here's some updated pics from the weekend.

volcano buster · Nov 24, 2011

Any chance you will be able to weight this sled when you are done?

1RMDave · Nov 27, 2011

I'd love to if i can find someone with a scale.

slash · Nov 27, 2011

1RMDave said:
I'd love to if i can find someone with a scale.

load it up on your trailer and take it to a truck stop get er done..

1RMDave · Jan 15, 2012

Finished it up today, here's how it sits.

Peak Productions · Feb 6, 2012

Sweeeeeeeeeeeeeeeeeeeet build man. It's awesome to see that something like that doesn't stop you from riding! Sweet conversion. I'd look into a 159" if you really want to get the most out of west riding.

2007 Polaris FST Switchback/RMK build

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