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  1. #1

    Any good updates

    I picked up a 1994 polaris SL650 that sat for 20 years and I've got the engine down to the crankshaft due to it needing a new one. I was woundering if any of y'all knew any good upgrades then the fuel and oil upgradesClick image for larger version. 

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  2. #2
    Click avatar for tech links/info K447's Avatar
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    Welcome.

    Do you want to keep it close to stock performance, power, appearance, for a 650 from 1994, or start upgrading things?

  3. #3
    I'm trying to increase power but the body I'm making the inside and outside a ultra blue and white theme and I'm looking for upgrades that help it keep running for a good long time

  4. #4
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Welcome to the Hulk.

    Where in OH are you located?

    Just a FYI for you:

    650cc = 68HP and around 45 MPH

    750cc = 80HP and around 48 MPH

    780cc = 92+HP and around 52 MPH

    All 3 of these use the same bottom end and carbs. You can install whatever top end you wish. You will need to change some other parts like exh manifold for the 780, possibly the CDI, definitely carb jets and the impeller.

    The 1994 was the first year they used the modular jet pump set up. (good upgrade from the previous years) You can install a longer drive shaft, 4" spacer/wear ring, longer cooling tube and a pump wedge to gain a few MPH over the stock short pump the 650 came with.

    Adding trim to the ski is a good upgrade as well.

    For longevity/reliability make sure you maintain a sound fuel system and oil lines. Also jet the engine to a little richer condition as opposed to running lean on fuel.

    Generally recommended to run the NGK BPR8ES spark plugs over the BPR7ES plugs originally called for.

    Hope this helps

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  6. #5
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by Troy(Redneck) View Post
    ... keep running for a good long time
    Click here

    http://polarispwcknowledge.shorturl....t-things-to-do

  7. #6
    Quote Originally Posted by xlint89 View Post
    Welcome to the Hulk.

    Where in OH are you located?

    Just a FYI for you:

    650cc = 68HP and around 45 MPH

    750cc = 80HP and around 48 MPH

    780cc = 92+HP and around 52 MPH

    All 3 of these use the same bottom end and carbs. You can install whatever top end you wish. You will need to change some other parts like exh manifold for the 780, possibly the CDI, definitely carb jets and the impeller.

    The 1994 was the first year they used the modular jet pump set up. (good upgrade from the previous years) You can install a longer drive shaft, 4" spacer/wear ring, longer cooling tube and a pump wedge to gain a few MPH over the stock short pump the 650 came with.

    Adding trim to the ski is a good upgrade as well.

    For longevity/reliability make sure you maintain a sound fuel system and oil lines. Also jet the engine to a little richer condition as opposed to running lean on fuel.

    Generally recommended to run the NGK BPR8ES spark plugs over the BPR7ES plugs originally called for.

    Hope this helps
    It helps alought but I will say it came with trim idk if the person I got it off of put it on but it already had it but it for sure needs a new trim motor thanks for your feedback

  8. #7
    This helped alought it had some info I didn't know like about the negative wire thanks for your feedback

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