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Thread: 95 sl750 rpm

  1. #1

    95 sl750 rpm

    sl750 +80 over with 780carbs i can only get about 6300 rpms seems kinda low? for 80 over should i chang cdi, impeler? kinda stumped here thanks in advance ....tony


  2. #2
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    I assume you mean 71.75mm? (most people don't say 80 over)

    What jetting is the carbs set at?

    What's your piston wash look like?

    What size impeller is on it now?

  3. #3
    well took it on the water today changed plugs and it ran at 6400-6450 rpmsstock impeller, carbs are stock 780, how do i find out what my piston wash is? O and sorry 71.75mm lol

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    Click avatar for tech links/info, donation request K447's Avatar
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    Several good threads discussing piston wash patterns.

    Start by looking in the Tech sections

    You can either use a tiny flexible flashlight to peer in through the spark plug hole, or you can remove the cylinder heads and see the wash patterns much easier (and take photos, if need be).

    I use a Provision boresope.

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    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Quote Originally Posted by pitbullsoul View Post
    well took it on the water today changed plugs and it ran at 6400-6450 rpmsstock impeller, carbs are stock 780, how do i find out what my piston wash is? O and sorry 71.75mm lol
    That sounds about right RPM wise, but you'll still want to check your piston wash because your jetting will need to be bumped up for the added piston size.

    You don't want to run that thing lean. Piston damage will occur.

    Do a search for piston wash. It'll show you some pics of what it is you're looking for.

    Quickly though:

    All black piston dome is lean.

    All black with a finger nail sized clean spot near each intake port is perfect.

    Large clean areas on the dome is rich.

    It's always better to be rich, than it is to be lean.

    Also, it takes a little while of running time to develop piston wash, so take it easy for a little bit after break in of new piston rings.

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    Bing-A-Ding-Ding-Ding, Brrrrrap! Brrrrrrrrrap!!! Polaris_Nut#1's Avatar
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    Your jetting should be real close now. Your 750 was 69.72mm and a stock SLX is 71.3mm. My concern would be are they 95 or 96 carbs? If they are 95's you are all set because they have the same impeller. 96 they switched to a 3 blade on the SLX and the jetting was slightly different.

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    Bing-A-Ding-Ding-Ding, Brrrrrap! Brrrrrrrrrap!!! Polaris_Nut#1's Avatar
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  8. #8
    tahnks for the info guys O and they are 95 carbs. going to run another tank through it then check pistion wash ill try to post pics this week. .................again thanks

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