My 2005 kx 125 piston and cylinder have been scared because oil is not getting in the enguine. cost! ?

Question

It seems as if that oil isn't getting to my top end and is bone dry, why is this (i did put oil in) . because of this my piston and cylinder have been scared. i know i need to get the cylinder re-bored which isnt a problem, i just need to know what size to and where i can get a slightly bigger piston from ( prefebily in the UK).

Answer 1

Ok well for starters NEVER PUT OIL IN THE TOP END all the lubricants in your bike are not oil at all

1. Premix - mixed with gas @ 32x1- lubs top end of motor

2.Tansmission fluid - this is ran in your lower end and lubs all your gears in it

3.Brake fluid- Dot 3 -BRAKES ONLY

As far as your bike the cylinder head will need to be sent to a machine shop to be bored over for a bigger piston then you will need a sleeve get and iron sleeve it can be bored almost 5 times before its done . Check out ebay for your parts Piston's and ring's come together and you will need to find a sleeve for it all .

You are going to spend some dough though .080 over piston and rings are 80usd plus shipping and the sleeve not sure check with your local dealer

If you did put oil in the top end get it out before any one see's you and never do that again

Answer 2

Your engine is a two stroke. It get's it's crank and piston lubrication from the oil you mix into the gas. The oil in the gearcase doesn't have anything to do with it.