Results 1 to 7 of 7
  1. #1

    polaris sl 750 build-rebuild

    the other week i picked up a snowmobile and while i was there the guy gives me a 95ish sl750 with a bad top end sd he has been searching and searching cant find parts for it and when he does they are out ragously priced so he sd take it its yours, and in the week or so of searching iv discovered alot of the parts are the same as a 93 storm snowmobile engine (i know snowmobiles, first expiriance with jet ski have only rode one 2-3 times in my life) and im wondering how close are the motors, i know the 800 cc cylinders off a 94 or newer storm will fit on the 93 750 motor, will they fit the jet ski to? and where can i get some go fast parts? i want triple pipes on it i can tell by lookin it should wake it right up


  2. #2
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
    Join Date
    Jul 2007
    Location
    Cedar Rapids,Iowa
    Posts
    6,381
    +1
    23
    The porting between the snowmobiles and Jet skis are totally different,so A snowmobile jug won't work on a ski,The good news is good used parts are everywhere and very fairly priced.On here or on E-bay. Now to get any gains from triple pipes (which are a little rare) will also need bigger carbs,intakes, reeds,and porting helps. First things first Welcome to the Hulk, Your best and most knowledgable place on the web for Polaris and all other skis. Now Grasshopper,do a search on performance under Polaris,there's a week worth of reading there to figure out what works and what you wish to achive.

  3. #3
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
    Join Date
    Oct 2006
    Location
    Cleveland OH
    Posts
    17,328
    +1
    29
    Welcome to the Hulk Vogey.

    Some parts will interchange between snow and water skis but not too many.

    If you want go fast parts, be prepared to shell out alot of $$$$. PWC are NOT cheap......

    Triples are the best boost for performance, but come with a stiff price tag normally. Only PSI made them for the 650, 750 or 780 and they were $2k back in early 90's. So they are pretty rare and will run around $500 for a used set.

    Plus, like Dan mentioned, there are a host of complementing parts to go along with them.

    Now you can boost power fairly cheaply, but will not make it FAST. If you want fast, then buy a bigger ski. That ski topped out around 48 MPH stock to give you an indication. A brandy new Sea Poo will do up to 72 MPH. That's what I mean by buy a bigger ski if you wanna go fast.

    Now a VERY fairly priced factory race ski is the Polaris PRO 785. They did 63 MPH and have killer accel with triple pipes and exhaust valves stock. They've been going for around $2k and under lately. Much less than what they should IMO.

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canada
    Posts
    36,575
    +1
    1,272
    Welcome to the Hulk!

    What are the last four digits of the Hull Identification Number (HIN) on the metal plate riveted to the rear deck of the hull? Last two of those four are the model year.

    The engine will also have a serial number sticker (often located on the water cooling bar on top of the cylinders). The engine serial includes a code for the engine size. Between the two, we can figure out exactly what machine you have.

    If you post some photos of the hull and engine area, we can often tell if it has been upgraded or modified from factory. Or just as important, if some parts are missing!

    You can find the 1992-1998 Polaris Factory Service manual here.

    You may want to enjoy riding your 'free' PWC for a summer or two, once you get it going. Or you could consider selling it as a working machine, and putting the money towards a bigger/faster model. Last option is to part it out, and use the money for another PWC.

    As mentioned already, the Polaris Pro 785 has fantastic acceleration and sticks-to-the-water cornering, and is selling for modest prices. The Polaris Pro 1200 has about the same horsepower, but without the triple pipes and exhaust valves.

    Any of the Polaris models with a 1200 engine are good for about 60mph, or a little faster, stock. Triple pipes are rare for the 1200 motor, but they do turn up from time to time. Other power/speed mods, like boosted compression and porting, are always possible with the carbureted models.

    Would you be riding by yourself, or taking passengers along? The Polaris 2 seater models are OK with two people, as long as the total weight is not heavy. The three seater models are about a foot longer in the hull, and are much happier with two passengers.

    There is even a four seat Genesis model, if you want to take the whole family for a ride. Seems to be the best handling four seat PWC ever made, as the other brands four place machines are simply huge.

  5. #5
    i figured the snowmobiles ran at a higher rpm, i was thinkin i could get a impeller with a shallower pitch to accomodate that, i have a complete 800 motor avalible and have the decals from a 95 storm in my garage, my plan was to paint the ski black and put storm decals on it lol

    but thanx for the quick replys! im sure i will have lots more questions once i really dig into it an get hands on

  6. #6
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
    Join Date
    Oct 2006
    Location
    Cleveland OH
    Posts
    17,328
    +1
    29
    Quote Originally Posted by vogey View Post
    i figured the snowmobiles ran at a higher rpm, i was thinkin i could get a impeller with a shallower pitch to accomodate that, i have a complete 800 motor avalible and have the decals from a 95 storm in my garage, my plan was to paint the ski black and put storm decals on it lol

    but thanx for the quick replys! im sure i will have lots more questions once i really dig into it an get hands on
    You need to remember that PWC are direct drive. If you lower the pitch to raise the RPM, you'll prob launch very nicely, but will lag on top speed.

    Maybe try the search function as this has been brought up before, but all I can remember is the 2 skis are ported completely different for a reason. Bottom end torque needed for PWC or something like that.

  7. #7

    Smile

    it would be like trying to run a formula one engine in a pickup, snow mobiles have much less initial resistance on take off than a loaded jet ski,water has ten times drag ,thats why a doo 580 on snow will go 85+ yet a 650 seadoo is good for max 45+ big diff. and doubling horepower doesnt double speed on water it takes like 7 times the hp. to double speed on a given hull in water.jmho>Marvin

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. 1995 Polaris SL 750 REBUILD
    By bigdaddy1975 in forum Polaris Projects
    Replies: 1
    Last Post: 01-22-2016, 01:52 PM
  2. yet another 1994 Polaris SL 750 jet ski project
    By Artiom in forum Polaris Projects
    Replies: 172
    Last Post: 09-05-2011, 08:56 PM
  3. 95 polaris sl 750 help
    By scottr2200 in forum Polaris Open Discussion
    Replies: 44
    Last Post: 07-09-2007, 08:33 PM
  4. 1994 Polaris SL 750 problem
    By Playtime in forum Polaris Open Discussion
    Replies: 5
    Last Post: 04-24-2007, 06:49 PM
  5. SL 750 crank rebuild
    By Polaaron in forum Polaris How To & FAQs
    Replies: 7
    Last Post: 02-22-2007, 12:38 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
  •