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Old 02-14-2011, 04:39 PM   #1 (permalink)
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4 Strokes

What are the cons to the 4 strokes besides the weight? Or is that not a con at all? I am looking to upgrade sleds this summer to a Polaris dragon, but am unsure of getting the 4 stroke turbo, or stick with the 2 stroke 800. Just curious on the difference, I have not been able to drive a 4 stroke yet. Is there a big difference?
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Old 02-15-2011, 12:36 AM   #2 (permalink)
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The FST is a nice machine, but if you do any of your own work, you won't be able to work on it much. It's a very complex engine that requires a lot of special tools to work on properly. When you break anything on that engine, it is REALLY expensive to repair. Even things that should be easy aren't on that engine. The FST that I rode had a little turbo lag, but it was not horribly noticable. I did notice the weight over the skis, steering was noticably stiffer than my 08 600. The FST wasn't that much faster than my 08 600 and was slower than my (not quite stock) 700.

The FST gets better fuel mileage than the 2-strokes, you don't have to keep adding oil, emissions are less in the 4 stroke.

The 800 2-stroke has more HP in a lighter engine, thus with the same track, the 2-stroke is lighter. If you want some real power, you can still add a turbo to the 800. Polaris has had a lot of issues with the 800, hopefully they have most of those fixed.

Decisions, decisions!!
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Old 02-15-2011, 01:14 PM   #3 (permalink)
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There's a reason they put the turbo on the 4-stroke...
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Old 02-15-2011, 02:26 PM   #4 (permalink)
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why haven't they figured out how to put a turbo on a 2 stroke yet...

of course your going to notice the turbo lag on a 4 stroke... with out the turbo there's no power...
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Old 02-15-2011, 02:36 PM   #5 (permalink)
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The 800 CFI will be cheaper to maintain. 4 strokes require less maintenance usually, but when they do, it hurts the pocketbook more. A top end rebuild on a 2 stroke is ~$300, and on a 4 stroke I've heard it's over $1,000. Polaris Files does have a lot of info on the FST's...you might want to head on over there and do some looking. Lots of info on things you can do to get some more ponies cranked out also.
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Old 02-15-2011, 03:11 PM   #6 (permalink)
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Honestly, If you want a fourstroke look into yamaha. They pretty much were great in everything they did. The triple sleds they made were almost bulletproof and their fourstrokes are the same. Yamaha's four strokes are the only way to go in my eyes for sleds.
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Old 02-15-2011, 03:42 PM   #7 (permalink)
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I rode my friend's FST (who is a polaris dealer). Its got great throttle response, just squeeze and go & it sounded electric, very smooth.
It has had some issues, and yes its expensive to fix but he's a dealer luckily
X2 on polaris files for us average non dealer owners ....

My other riding friend has a 1200 skidoo 4 tec. And he added a turbo kit. Power mania. He rides up in Canada a lot so & wants braggin rights & has $$ to blow & lives to ride sleds, does all his own work, responsible. He offered for me to try his sled last ride out & passed. That thing is a rocket ship in the open fields. Crazy hp.

How about the Z1? Heard great things about them, people seem to love them on the trail. By order of trail presence from what I have seen on the trail this year (1800 mi), ski doo, arctic cat, yammi then polaris when it comes to 4 strokes.
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Old 02-15-2011, 04:53 PM   #8 (permalink)
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I have pretty much never seen any other four strokes besides yamaha out on the trails this year. And, at the races where a TON of people came on sleds, there were a lot of yami four strokes.
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Old 02-15-2011, 06:05 PM   #9 (permalink)
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Quote:
Originally Posted by sledhead16 View Post
why haven't they figured out how to put a turbo on a 2 stroke yet....
They have been turboing 2 strokes for a bunch of years. I ride with a couple of guys that both have EFI RMK 800's with turbos. They are cranking out about 220 hp out of those. I also sold an engine from one of my "fire" sleds that ended up in a mod sled that is also turboed with carbs. That thing runs really strong as well. Got 5 grand? You can put a turbo with intercooler on pretty much anything.

Check out Boondockers web site, it's pretty informative!

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Old 02-15-2011, 08:11 PM   #10 (permalink)
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Originally Posted by sledhead16 View Post
why haven't they figured out how to put a turbo on a 2 stroke yet... ...
You gotta be kidding? I was standing among dozens of turbo 2-strokes two weeks ago at the Ogden Winterfest. Had a friend who came in 2nd in the 800 class, and 5th in the 700 class on his turbo Polaris (700cc 2-stroke).

Come on? Serious? Here, enlighten yourself...

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Old 02-15-2011, 08:59 PM   #11 (permalink)
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Quote:
Honestly, If you want a fourstroke look into yamaha. They pretty much were great in everything they did. The triple sleds they made were almost bulletproof and their fourstrokes are the same. Yamaha's four strokes are the only way to go in my eyes for sleds.
I think I'll just buy the 2-stroke, I'd never live it down with my buddies if I bought a Yamaha!!! Thanks for all the info.
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'93 XCR 440
'94 XLT
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'00 XCSP 500 SOLD 8/21/11
'06 Fusion 600 Sold 3/11/11

CURRENT SLED 2010 Polaris Rush 600 bought 11/25/11
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Old 02-15-2011, 09:18 PM   #12 (permalink)
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have you ever even looked under the hood of the FST?... I think I'd stick with the 800
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Old 02-17-2011, 06:25 AM   #13 (permalink)
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My opinion ,Yamaha ! If you can get 750 hp on a stock motor with a turbo before it grenades with BIG boost lbs.,then I think the Yamaha has proven it's self for being bullet proof all stock .My brother has 3 yami's now 1.2005 Vector with turbo 2. 2006 Apex ,stock & 3 A 2008 Yamaha Nyrto 40th anniversary . No issues at all.
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Old 02-17-2011, 01:57 PM   #14 (permalink)
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Yea yamaha definitely has their four strokes down! I absolutely love the sound of them to!! My bro had an apex and within 15 miles of riding it this year, he had it sold. It was just not a good sled for us younger guys that like to ride aggresively.
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Old 02-17-2011, 07:08 PM   #15 (permalink)
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Originally Posted by Mighty Quinn View Post
My opinion ,Yamaha ! If you can get 750 hp on a stock motor with a turbo before it grenades with BIG boost lbs.,then I think the Yamaha has proven it's self for being bullet proof all stock .My brother has 3 yami's now 1.2005 Vector with turbo 2. 2006 Apex ,stock & 3 A 2008 Yamaha Nyrto 40th anniversary . No issues at all.
Quick... Call Guinness!!!

Three Yamaha ha ha ha's with no problems HAS to be some kind of a record!
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