Super Jet took apart engine and need advice on a few things before rebuild!

[skillzskamatic]

So I took my 61x/62t that has been bored to 83mm and ported out of my ski to check it out and do a little overhaul on it after it sat for a little over a year (just want to make sure all is well). The entire engine was built and assembled by a professional builder that I purchased it from here on the X, i never had an issue with it and only ran it for about half a summer before it then sat for the fallowing year. I noticed on one of the pistons intake side it has to vertical wear marks, everything else looks perfect and barley broken in (still hash marks covering rest of the cylinders besides the two spots that line up with marks on pistons). I just want to know if I should do anything before putting back together or if it should be fine. I've checked out pics of 4pt. seizure and such so I don't know what to do. Please help with options, can I leave as is, hone and replace with same size pistons, or bored to 84mm which I'm not sure can be done to this cylinder? they are wiseco pistons.

 

[Crab]

Personally I would hone and re-ring at a minimum, prolly running to cold or more warmup before wot

 

[skillzskamatic]

good info thanks, yea at one point I know it was running to cold

 

[TheBuzzard]

make sure the rings move freely and there are no aluminum deposits on the cylinder walls. maybe hit the piston with some 600 sand paper right where the score marks are. throw it back together, check compression and beat it. should have checked compression before you tore it apart.

 

[skillzskamatic]

compression was always right on, rings look perfect as the marks don't even look like they reach all the way up the piston.

 

[TheBuzzard]

put it back together and michael jackson it. i've been told cheap oil can leave score marks.

 

[skillzskamatic]

thanks all good input much appreciated