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-   -   02 YZf 250 yamaha (http://www.slednutz.com/showthread.php?t=8446)

stagesrt4 03-31-2015 09:11 AM

02 YZf 250 yamaha
 
picked up a blown 2002 yamaha 250 YZf last night

I need a cylinder and piston.

gives me something to wrench on this summer. Hopefully it doesnt take whole summer to have it rideable.


DirtylilWolfess 03-31-2015 10:33 AM

The blown up thumpers that old are usually money pits. That being said, you can always flip them and get parts cheaply if you have a little patience. Shouldn't be a problem for you 'tall! Take pics of the carnage and rebuild!!!

stagesrt4 04-01-2015 10:21 AM

i aquired the top end i needed for $150 and gasket kit for $60

also spent $18 on a manual cause i prefer to know Im doing things correct.

so now itll just be my time re assembling this beast... but yeah if need be a can get my money back easily for what i paid

stagesrt4 04-01-2015 10:34 AM

will take a lot of hours but ill get it assembled at some point this summer



Original engine



valves arent too bad, mostly just covered in carbon... but ill probably get it inspected/decked



used bottom end that i hope to use Crank feels super smooth n tight. current piston was seized so ill have to make sure it wasnt due to oil pump failure.



Used cylinder/piston i just orderded for $150 from a guy that upgraded his to the 290 kit.


DirtylilWolfess 04-02-2015 10:21 PM

Something looks funky on the top of that piston. Don't quote me though. I haven't rebuilt a 4-stroke yet. But that shiny ring around the top makes me question the condition of the machine that it came from?

stagesrt4 04-03-2015 07:31 AM

thats how the 4 strokes looks for valve clearance n function


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