700 Dragon Reliability

[bboll]

I would like your comments on the overall reliability of the M.Y. 2007 - 2010 polaris 700 engine and RMK/dragon chassis. I have heard horror stories about the 800 engine going down but what about the 700? How many miles before people are replacing pistons? Also, I would be interested to hear about the reliability of the 700 with a turbo.
Thanks.

 

[bboll]

Also, what is the fix kit? Was there one for the 700?

 

[tree climber]

700=bulletproof only the 800's had those issues. im running 12lbs boost on my my07 700 holding together great

 

[mtnclimber19]

I wouldn't say bulletproof. My 08 lost a piston skirt that basically took out the whole motor at 2800 miles. I think they definitely have a better track record than the 800's however and maybe my experience was a fluke.

 

[bboll]

Thank you tree climber I'm looking at building the same set up you described. How many miles do you have with the turbo on it? Do you run a race gas/92 mix with 12lbs of boost?

 

[Snowbird11]

I wouldn't say bulletproof. My 08 lost a piston skirt that basically took out the whole motor at 2800 miles. I think they definitely have a better track record than the 800's however and maybe my experience was a fluke.

same problem with one at work this season. similar miles as well.

here's a link to the thread: http://www.snowestonline.com/forum/showthread.php?t=300888&highlight=engine

hard to tell what caused the issue first but the engine was toast. i still can't get the primary clutch off the crank.

 

[sledhed]

IMHO, the 700 is reliable, but nothing is bullet proof. Depending on how and where you ride, pistons are a maintenance replacement item, every so many miles, replace them, to be safe. Even if they "look good" and even if the compression is still good. These engines turn out a lot of horsepower compared to engines even from 5 or 10 years ago.

My 02 Skidoo 800 ate a skirt at 1500 miles. Lunched the whole motor. 1200 miles was the common wisdom on that motor when stock and I put it off just a little too long.

Mountain miles or lots of WFO riding is harder on a motor.

Have a buddy who put 3000 miles on a mostly-stock 08 Dragon 800. His crank finally let go at 4500. Pretty impressive IMHO. So sometimes things last a long time, sometimes they let go early, you just never know for sure...

 

[MORSNO]

From another 700 owner, I agree with sledhed, they are reliable but nothing is bullet proof. I have an '07 D7 that has been completely trouble free since I bought it new back in the '06/'07 season, and still going strong. Lots of HP for a 700 (140hp stock), accepts mods/turbo's pretty good along with preventative maintenance.

 

[MARV1]

Bulletproof? NO, reliable enough to enjoy? YES! And I want another one too as they are more fun than 600's.

 

[silverfox]

07 T700 Dragon

I had 2800 miles on mine used NOS for 2 years then a turbo for 2 years. 5-7 lbs premium fuel then rod bearing went out. Usual issues with stators and voltage regulators....

 

[shelbwyo]

I got almost 3000 on mine now after putting on about 1200 miles this year. Do you guys think i should change out pistons now or wait till something goes wrong? I would rather change them before next season before it takes out the whole engine.

Also, what are you guys running on oil when you get a lot of miles out of the engines? Im running polaris gold because thats what was ran in it before i bough it.

 

[MORSNO]

I got almost 3000 on mine now after putting on about 1200 miles this year. Do you guys think i should change out pistons now or wait till something goes wrong? I would rather change them before next season before it takes out the whole engine.

Also, what are you guys running on oil when you get a lot of miles out of the engines? Im running polaris gold because thats what was ran in it before i bough it.

I would change out the pistons/rings and hone the cylinders this summer as preventative maintenance. You have 3,000 trouble free miles, don't risk major damage or being stranded miles from the parking lot and needing a tow, ruining others riding also.

I have also been running Polaris Gold since new. I've also cleaned my exhaust valves before each season, and haven't found much carbon buildup. Any good oil will probably have the same results.

 

[rockin rmk]

3500 miles one tps sensor one fuel filter and one set of plugs. I would say the 700 is reliable.