topend help

[cr125 kid]

I got a 1999 cr125 that im doing a topend on . I have all the parts and gaskets .. and everyhtign .. rings whatever I need... Iv never done anyhting on bikes before but I find it very interesting... I dont have a manual or anyhting and toar my whole bike apart .... the heads off the top of the cylinders off .. the power valves covers are off ... I jsut need to put everythign back together ... I have a torque wrench .. is there anyhting thing else ill need ?? and is there any tips of how to do this ... ?? all help is very apreciated .. like I said I find it fun ... and chalenging but I want to learn how ...

[cr125 kid]

also I really need to know how many lbs to use the torq wrench at ?

[2002shee]

First of all, get a manual!!!! This is a fairly simple operation but there are some key things you need to know. You will need to check the cylinder bore diameter and inspect the piston for wear. You also need to check the ring end gap after the cylinder is honed. Without a proper hone (or deglaze) the new rings will not seat in properly. If any of these are out of specs then you can be sure the top end will fail. If you are unsure then bring the cyl., piston, and rings to a shop for inspection. It seems you are able to do the work yourself just fine so spend some extra time to make sure it comes out perfect. Hope I was able to help and good luck.

[lt250rm]

like shee said did you hone the cylender.

[cr125 kid]

thx everyone.. It helped a lot ... too bad I got so much crap going on right now ... family probelms I didnt fully put it together but I will eventually . Its not my #1 priotirty right now.

[cr125 kid]

got some pic sof the piston but I put the hea dback on bike and forget o take a picture so sorry about that.



<a href="http://photobucket.com" target="_blank"><img src="http://i34.photobucket.com/albums/d101/CR125KID/piston111111111.jpg" border="0" alt="Image hosting by Photobucket"></a>

<a href="http://photobucket.com" target="_blank"><img src="http://i34.photobucket.com/albums/d101/CR125KID/piston222222.jpg" border="0" alt="Image hosting by Photobucket"></a>

[cr125 kid]

[cr125 kid]

sorry used to myspace i used the wrong code guys ... **

[dchd1130]

get the manual Honda makes a great service manual its easy to follow and they give you alot of info. I would get a new piston. I did just rings on my CR250 once and the skirt fell apart and put a whole in the bottom of the case

[cr125 kid]

i got brand new gaskets wring berrings and piston and clip and complete topend ... I just didnt do the bottome end .. but u dont have to