85lt250r Piston

[WHISTLE69]

Does anyone know if the 2.0 mm is a stock piston or not??? i had no compression and when i took the jug off the cylinder has a small score......but i think it will be ok.....but the ring was broke.....i got all the parts out.....and cleaned it up...i'm gonna try to get just a piston and rings......everything else is good....any sugestions? or anyone have a x-tra piston and rings

[Awdennis]

try looking a Wiseco's website to see the different bore sizes.

You said you had no compression and that a ring was broken, well was the piston damaged at all?

also you said that the cylinder has a scratch in it, how deep and or long is it?

Depending on the condition of your piston and cylinder, you might get away with re-ringing your piston and honing your cylinder.

But if your cylinder is to damaged then you will obviously have to bore and buy the next size piston.
Or if your piston is to damaged and your cylinder is fine with a hone, then just by a new piston/ring set.

When you were cleaning it up you didnt get any shaving or small pieces in the bottom end did you? cause thats bad, I always put a paper towel around the rod and stuff it down in the bottom end to prevent crap from falling in.

hope all that helps, good luck dude.

[lt250racer]

I would think that the 2mm is 80 over which is the last bore because on the 85-86 the standard bore is 70mm and you can bore the sleeve untill 72mm each bore a 1/4 of a mm, check with your local dealer to make sure.

[fufanu360]

Originally Posted by lt250racer

I would think that the 2mm is 80 over which is the last bore because on the 85-86 the standard bore is 70mm and you can bore the sleeve untill 72mm each bore a 1/4 of a mm, check with your local dealer to make sure.

you sure, i would think that each bore is more than 1/4 of a mm... well i guess if like .020" is 1/4 mm your probly right

[gh500]

he is right every .25 or 1/4 mm just under .010" each step