2008 Dragon Compression??

[Toddstud2003]

I have 2008 dragon 800. I checked compression was in between 105-110. I was told by Polaris that when they updated and fix motor issues that they put lower compression head on them. They said anything over 100 is good. And my numbers are perfect!
Any opinions on this issues?

 

[AviatorDragon]

To me that seems low, im in the middle of a rebuild on an 08 d8, before my rebuild i had 40 in 1 cylinder and 100 in the other the cylinder was pretty bad on the 100 side. Either way i was always told on an 800 below 115 to rebuild them, i would get the mtntech kit from pms polaris and rebuild it, the kits a must. I would do it before it gets any worse and your into it an extra 500$ or more

 

[Toddstud2003]

did you notice difference in engine before you decided to rebuild?

 

[AviatorDragon]

before i had to rebuild it completely went toast, the sled wouldnt idle it was impossible to get it into reverse, before that day when it started running completely bad i had a really bad top end bog and the mid range bog was pretty bad, polaris with the recall didnt actually fix the issue, there is so much piston slop its scary, these motors are junk without the fix, most people throw the fix in just for peace of mind on not blowing a motor, and i would say yours is due, then you will have the peace of mind

 

[blazer71]

What's your elevation? That is a critical piece of info. 90-100 at 6k seems about avg around here. Lots of variables, guage variances, holding throttle plates open, pulling until the needle stops versus set count of pulls. What is your process?

 

[Adobe-Al]

I'm in Colorado at 6500ft. I was getting about 110 psi. after "The Fix". i wanted a little more so I put a PA head on it. Now I have about 120 psi and my sled rips low and mid range. Didn't get alot on top and didn't get anymore R's, thought I would pick up a couple hundred RPMs on top but didn't. 09D8 08 Flash PA head- 10-58's recommend setup from PMS

 

[Toddstud2003]

That is my process... Hold throttle wide open.. pull about 7 to 8 times... I get about 110 at 5400ft.... Thanks for the input.
I have no issues of it running bad. Runs perfect! Only issue is have to hold throttle open just little bit when starting after sled is warm.

 

[JustinB]

before i had to rebuild it completely went toast, the sled wouldnt idle it was impossible to get it into reverse, before that day when it started running completely bad i had a really bad top end bog and the mid range bog was pretty bad, polaris with the recall didnt actually fix the issue, there is so much piston slop its scary, these motors are junk without the fix, most people throw the fix in just for peace of mind on not blowing a motor, and i would say yours is due, then you will have the peace of mind

I just rebuilt My 08 700 Compression is at 120 each cold......mine wouldn't idle and wouldn't go in reverse my TPS sensor was way off.

 

[Toddstud2003]

I'm not sure , But I think the 700 and 800 are different when it comes to this issue.