Question about kawasaki 125 Dakar Motorcycles

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A piece of metal scrathed the side wall of my piston sleeve and goudged the top of the inside of my crankcase,like where my spark plug scews in.it siezed up and when i opened it i noticed antifreeze on top of the piston.so i know i have to replace sleeve piston etc.but my rod has some play from up to down.not side to side. does this mean rod bearing or more?im fairly new to this stuff please help.it is a kx 65 my sons bike 2003.

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There should be no play up and down. Any play is coming from a worn out needle bearing on the crank. A bit side to side is okay and normal. The crank will need to come out then it gets pressed apart and fitted with a new bearing. Price out the difference in cost of fixing the crank verses getting a new $170 crank assembly.What probably happened is a broken piston ring extended into a cylinder port and the piston against the ring is what gouged the cylinder and head. Please rate my answer.
a piece of metal scrathed - tombones49_145.gif

Posted on May 29, 2011

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Hard to pull starter rope. If s plug removed pulls easier but does not spin as free as would expect. This happen after hard run day before.


you might have damaged the piston cylinder or crank bearing. Put some light weight oil in the cylinder leave the plug out and pull it over a few times to see if it gets easier. If it does, the cylinder may need to be honed, if it doesn't make a difference put enough oil in the cylinder that it will get oil into the crankcase where the bearings are for the piston, pull iy over with plug out and see if it gets easier, if it does the bearing is scored. do it in that order a little to start with to check the cylinder, add more to check the crank. if you can before doing that procedure pull the plug, use a bright small light to look into the cylinder through the spark plug hole and look for score marks, dark areas on the cylinder wall, any kind of deep scratches. if there are any of those things, the cylinder wall is damaged and will need to be hones or bored, depending on the make and modle of the saw it may have a sleeve that is replacable.

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It takes 3 things for an internal combustion engine to run... compression, spark, and fuel.
First perform a compression test. If its under 90psi the compression is too low and it would cost more to repair than to replace.
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Next, be sure that your fuel is fresh and free of water. If the fuel is more than 20 days old it is stale.
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Thanks for contacting FixYa. I was reviewing some of the older un-answered questions trying to ensure your issue has been resolved.

You should be able to resolve this issure by just removing the top end. You will have to remove the tank, the pipe, disconnect the carb, any water hoses, and possibly the radiator. If there is no damage to the connecting rod you be able to thoroughly clean the crankcase withough removing the engine. If you have damage to the top rod end you will have to pull the engine and split the case to replace the connecting rod.

TF

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1 Answer

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