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flynjay · February 21st, 2012, 07:49 PM

To do it right.

Take the head to a decent bike shop. Have them mic the cylinders and let you know if you need +.5 pistons or not. (probably, given what the piston skirts look like)

You can have them order the pistons and rings or order them yourself. Have the shop bore the cylinder to the +.5 spec (a good shop will not bore the cylinders until they have the new pistons in hand).

Then take all the parts home and put it back together with new base and head gaskets.

Adjust the valves

Done

You should be able to get pistons, rings, cylinder bored and gaskets for a little over $200.

February 21st, 2012, 07:49 PM	#16
flynjay ninjette.org guru Name: Jason Location: Houston, TX Join Date: Nov 2011 Motorcycle(s): 2007 Ninja 250 (sold), '06 Ninja 650R Posts: 455	To do it right. Take the head to a decent bike shop. Have them mic the cylinders and let you know if you need +.5 pistons or not. (probably, given what the piston skirts look like) You can have them order the pistons and rings or order them yourself. Have the shop bore the cylinder to the +.5 spec (a good shop will not bore the cylinders until they have the new pistons in hand). Then take all the parts home and put it back together with new base and head gaskets. Adjust the valves Done You should be able to get pistons, rings, cylinder bored and gaskets for a little over $200.