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  1. #1
    Plut's Avatar
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    Help with Carbs and Piston wash

    I recently did a top end rebuild on my 98 SLTX. I had it bored it .50 over. I don't have near as much power as before the rebuild and my RPM's only get up to 5500. It is bogging out pretty bad especially after trolling thru the no wake zones. Does boring the piston require the carbs to be tuned? How do I tune them? Do I need to rebuild them or is it just an adjustment? I checked the piston wash and the mag looks really rich though I'm no expert.



  2. #2
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    How much run time is on those pistons?

    And can you get a closer pic of the PTO piston?

    Yes, that MAG cyl is EXTREMELY rich.

  3. #3
    Plut's Avatar
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    I say I have about 12 hours on them.

    I don't know what to make of the PTO. I'm just learning about piston wash now but all the pics I've seen so far I havn't seen any that are clean in the middle then black and then clean at the edges again.

    I'll try to get a better pic this Thursday, I already put it back together.

    Should I try adjusting the carb screws? If so do I start with the upper or lower? How much should I turn them?

    Also this thing is going thru a tank in like 2 hours

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    Did you check your carbs at all? Check your inlet needles and seats as well as your control arm height. Looks like its getting a lot of fuel. My piston tops on my recently rebuilt 700 are almost as clean as your MAG piston with 40 hours on it, but I still get top rpms

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    Have you read Randys tuning tips for girls? That will explain how to adjust your carbs. are u using stock jets on the main and pilots? How far out are your high and low speed adjusters?( the needles to adjust)? remember your settings before you change them. write it down. that can be a benchmark of where you are if all goes astray.

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    there are no high speed adjusters on the domestic triples. Its all jetting. Make sure you have all the right jets in all the right carbs, each cylinder is different.

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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 BryanP View Post
    Did you check your carbs at all? Check your inlet needles and seats as well as your control arm height. Looks like its getting a lot of fuel.
    Quote Originally Posted by BryanP View Post
    there are no high speed adjusters on the domestic triples. Its all jetting. Make sure you have all the right jets in all the right carbs, each cylinder is different.
    Please advise and that's good advice ^^^^^^

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    Plut's Avatar
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    As far as I know the carbs are all stock. Do I need to rejet them since I'm now at .50 over? Also I'm in high elevation. The lake I go to most often is at 4200 feet. Its sounding like I should probably do a rebuid on the carbs just to make sure everthing is correct.

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    Being at 4200 fet is your answer. You are running very rich. I think there are some high altitude specs somewhere. However if you adjust it to run well at your altitude, if you go closer to sea level you will be way too lean, so just be aware of that.

  10. #10
    bowsniper's Avatar
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    Quote Originally Posted by BryanP View Post
    there are no high speed adjusters on the domestic triples. Its all jetting. Make sure you have all the right jets in all the right carbs, each cylinder is different.
    Thanks Bryan, I made a mistake. i was thinking blue motor.... opps. Can he use the tuning tips still? how does that work on domestic motors?

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