To hone or not the cylinder?

[adriano.ro]

First top end refresh on this bike,ec 250r 2014,has around 130 hours and still strong on power,start super easy. But is time for new piston,and with this event I clean really good power valve. Is really necessary to hone the cylinder or he need a good cleaning,(I mean for those hours )?

 

[arminhammer]

Do not hone. Scotch brite pad and WD40 then some soap and water.

 

[(F5)]

+1
Measure the old rings for giggles. If you're using good oil you might be surprised.

 

[adriano.ro]

I use only the best oil on the market,and I try to find best jetting to not make the engine to suffer ,the compression was almost like new, 170 psi!? For those reasons I would like to clean up and not to hone the cylinder .

 

[Simmo737]

Do not hone. Scotch brite pad and WD40 then some soap and water.

This. Doing less is more

Check out this vid.
https://m.youtube.com/watch?v=vaFp8aYkHNA

 

[SwampGasser]

still see cross hatches, do not hone.

 

[adriano.ro]

I heard someone who used some kind of acid to clean up the aluminium scratches...?!

 

[Brian VT]

If you melt a piston you can use muriatic acid to remove the aluminum from the Nikasil. If the Nikasil is scratched then you need that replaced.

 

[Zman]

Check that cylinder for a ridge at the top. If the ridge is significant I would be worried about catching the top ring.

 

[adriano.ro]

Check that cylinder for a ridge at the top. If the ridge is significant I would be worried about catching the top ring.

I can feel it with the finger but is small enough. And I will use same base gasket 0.5mm.

 

[(F5)]

It'll be sweet. Old school steel bores used to get much much worse.