Page 1 of 2 1 2 LastLast
Results 1 to 10 of 14
  1. #1

    Join Date
    Aug 2006
    Location
    Iowa
    Posts
    1,028
    +1
    2

    Pro 785 Hotseat Pipes Info

    Ok. I'm preparing to install these pipes on my Pro and I've run across alot of good info, but just don't seem to spot anything here. I thought I would start a thread here to gather more information and have it posted somewhere.

    So if you have any info/pix etc... please feel free to post up whatever.

    I cleaned up the pipes yesterday to prepare them for powdercoating. I found a hole in the stinger section, but it should be able to be repaired. It may be a common problem area, but not sure. It looks like porous, or possibly an overheated spot. Pix to come.


    Here's my engine:
    Stock porting/bore '97 785
    '99 CDI
    ADA head 140lbs compression
    Redtop 44's on a sidedraft manifold


    I'm looking for everyones difference in jetting specs and the following is what I have found so far. I have NOT run any jetting specs I have, but these may be decent starting points for those wondering.

    Redtops that I bought came with the following.
    Mains Mag 135 Cen 130 Pto 135
    Lows Mag 130 Cen 130 Pto 130
    Seats 2.0 2.0 2.0 unknown springs/unknown Pop-off

    Randy's Starting point
    Mains Mag 125 Cen 125 Pto 125
    Lows Mag 120 Cen 120 Pto 120
    Seats 2.3 2.3 2.3
    80g. Springs Pop-off not tested yet.


    According to my GPS, I'm right around 700-900 ft. elevation.

    As I think of anything else I'll post up, and again, please post whatever info pix, tuning info etc... you all might have.

    I'll clean up my ramblings after it starts looking more organized


  2. #2

    Join Date
    Aug 2006
    Location
    Iowa
    Posts
    1,028
    +1
    2
    Replacement stinger hose for STOCK or Hotseat Pipes. Great price.

    http://www.fluidsystemsengineering.c...cat=109&page=1


    Main pipe hose couplers, again, sizing for stock or Hotseat available.
    Also, nice T-Bolt clamps.
    http://www.boostcontroller.com/index.php?category=34

  3. #3
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
    Join Date
    Oct 2006
    Location
    Cleveland OH
    Posts
    17,327
    +1
    29
    Al's got the install instructions in his gallery.

    http://www.tripleateam.com/water/v/U...uff/?g2_page=6

  4. #4

    Join Date
    Aug 2006
    Location
    Iowa
    Posts
    1,028
    +1
    2
    Hotseat recommends running a 13/18 impellor if needed to bring Rpm's down. I have heard guys running 11/18 11/19 etc...

    I have talked to Randy, and for my set-up, he recommends trying a 12/18 and pulling 7900rpm's.

  5. #5

    Join Date
    Aug 2006
    Location
    Homer Glen Il.
    Posts
    8,702
    +1
    109
    i loved my 11/19 until i snapped my stub shaft and killed it

  6. #6

    Join Date
    Aug 2006
    Location
    Iowa
    Posts
    1,028
    +1
    2
    Pipes


    Heres a couple pix of the hole I found. Maybe this is a common problem area, but i have no idea.



    It looks like it's a spot that water would hit from the stinger feed? Looks like it could have been worn away from the inside water spray?? sand etc.. in the water and it just chewed up the metal but i dont know.

    I have the pipes in now getting patched, and hopefully all goes well!

  7. #7

    Join Date
    Aug 2006
    Location
    Iowa
    Posts
    1,028
    +1
    2

    Plumbing the pipes

    You will plumb them just like Randy's '97 updated plumbing, with the exception of change in restrictors.

    Apparently Hotseat pipes are prone to cracking (where I dont know) from following hotseats recommended plumbing. And is supposedly from too much water.

    The following is two diagrams of plumbing options. Randy did both of the drawings, and as far as i know, either should work.

    I think when I install my pipes, I will go off of the first diagram, but I think I will keep my jetworks valve set at 4psi, and not install a shim. I think less water from higher pop-off pressure will raise stinger temps too much for rec. riding.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Randy's Hotseat plumbing.jpg 
Views:	202 
Size:	1.78 MB 
ID:	141833   Click image for larger version. 

Name:	Randy's Hotseat plumbing#2.jpg 
Views:	134 
Size:	220.1 KB 
ID:	141834  

  8. #8

    Join Date
    Aug 2006
    Location
    Iowa
    Posts
    1,028
    +1
    2
    Here's a couple pix I found showing the pipes installed. Kinda shows how some of the plumbing can be done up front for the pissers and stingers.

    Last pic is pro1200 pipes, but you get the idea.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	HSpipes1.jpg 
Views:	74 
Size:	11.1 KB 
ID:	141847   Click image for larger version. 

Name:	HSpipes2.jpg 
Views:	87 
Size:	14.1 KB 
ID:	141848   Click image for larger version. 

Name:	HSpipes3.jpg 
Views:	75 
Size:	15.0 KB 
ID:	141849  

  9. #9
    I'D RATHER SWEAT THAN SHIVER hyoctane23's Avatar
    Join Date
    May 2007
    Posts
    1,967
    +1
    34
    You know, I STILL hate you for taking those pipes!! That hole is pretty interesting...how thin is that metal?

  10. #10

    Join Date
    Aug 2006
    Location
    Iowa
    Posts
    1,028
    +1
    2
    Quote Originally Posted by hyoctane23 View Post
    You know, I STILL hate you for taking those pipes!! That hole is pretty interesting...how thin is that metal?

    It was very thin in that spot. I was using coal dust at only 60psi in the blaster, and that was enough to expose it. I'm still nervous as hell bout them getting repaired correctly!

    These pipes aren't a cheap project i'll say that! I had another $500 in misc stuff i've gotten. Carbs, carb parts, hydroturf mats, couplers, clamps, intake manifold, plumbing fittings.

    Still gotta pay for pipe repair, getting them coated, need more jetting stuff, and impellor.
    Not to mention needing to run 50/50 race fuel.

    But yeah, i still can't wait to get them in and see how they perform!

Page 1 of 2 1 2 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. WTB - Parts WTB Pro 785 head pipe bolts
    By [email protected] in forum Polaris Classifieds
    Replies: 0
    Last Post: 01-10-2014, 12:33 PM
  2. Pro 785 HS Pipes
    By hyoctane23 in forum Polaris Open Discussion
    Replies: 3
    Last Post: 08-02-2013, 03:17 PM
  3. FS Pro 785 Triple Pipes With Jetworks Valve
    By seatsR4toilets in forum Polaris Classifieds
    Replies: 10
    Last Post: 03-14-2010, 09:23 AM
  4. FS Pro 785 Tripple Pipes Complete with Everything
    By 00pro785 in forum Polaris Classifieds
    Replies: 0
    Last Post: 09-22-2008, 12:57 AM
  5. Pro 785 Crack Pipe
    By Dazz67 in forum Polaris PWC Performance
    Replies: 2
    Last Post: 08-14-2007, 01:25 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •