Thread: Piston Wash Question
04-06-2009, 09:30 PM #1
Piston Wash Question
I've searched the forum for piston wash, and have concluded that my '97 SLTX with the 1050 engine is running a bit lean.
What i can't figure out is how to correct this problem. Is there a fuel/air adjustment on the carburator (Keihin) or do i have to replace the jets?
04-06-2009, 10:19 PM #2
- Join Date
- Jul 2007
- near Toronto, Canada
Can you post photos of the piston tops?
The Keihin carbs seem to be a little different than the Mikuni and Bing designs when it comes to tuning.
Is the engine running as it should, other than the piston wash suspicion?
What type of riding do you do?
Mostly wide open throttle, or lots of mid-range running?
04-06-2009, 11:53 PM #3
Hey Kl,A picture would be great.
How did you determine you are lean?
The 38mm Keihin carbs on your 97 should have low speed and high speed adjustment screws,there should be 2 small (black) plastic covers over these screws on each carb(located ,engine side,towards the fornt) remove that plastic cover,you will see the brass screw,the screws are hard to get to.
If it is running lean you should remove the carbs and make sure the screens are not plugged (located under the jet blocks) it is actually pretty easy to take the carbs apart,the online service manualls will help you through it.
04-07-2009, 09:31 AM #4
I donít have any pictures, I used a boroscope.
I have two skis and they both seem to be running fine, but when I look at the piston domes, one ski has a few fingernail sized clear areas at the perimeter of each piston. While the other ski has less than a fingernail area on each piston.
We do mostly mid-range running. However, we do a lot of low rpm running because to get to the lake were we play, we have to go through a long no wake zone. Iíd say a good eight minutes of low rpm at the beginning and end of each outing.
Does anyone sell an overhaul kit for these carbs or do you just buy the individual gaskets and seals as needed?
Thanks for the replies!
04-07-2009, 09:43 AM #5
04-07-2009, 10:14 AM #6
The carbs use o-rings and rubber diaphram. If your carefull,you will not need to replace them. Any PWC parts store should carry kits for the Kehein CDK II carbs
04-07-2009, 01:43 PM #7
04-12-2009, 06:34 PM #8
I plan to remove the carb and check/clean the screen, but after inspecting both of my Keihin carbs, they have no high speed adjustment screws. There is a molded area for them, but no screw. Just the idle speed screw.
Could this be possible?
04-12-2009, 10:58 PM #9
Either carb is pretty much the same inside,take a look,let us know what you find.
04-13-2009, 08:57 AM #10
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