Piston wobble - time for rebuild?

M

menatep

[video=vimeo;11941989]http://vimeo.com/11941989[/video]

Cylinder bores are 82.32 mm and 82.2 mm
Those measurements are based on 5 averages for each cylinder.
The motor ran fine and strong before I had electrical failures.... so I
don't know what's up with that cylinder wobble.

No idea how many hours are on the motor and i don't know the compression.

Should I bore out and go with 84mm pistons or is it possible to resleeve and go with even bigger pistons?

What piston size will the stock crankshaft handle if i run on pump gas?

If i do increase piston diameter, do I have to change or modify the domes on ADA head? I do not know the size of the domes.... how can i find out how many CCs they are?
 

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#ZERO

#ZERO

Beach Bum
Location
Florida - U.S.A.
You'll need to check the piston diameter at the mid skirt level and use a bore gauge to find the actual clearance.

Your sleeves will be the limit of the bore sized unless you're planning on going the big bore route and the compression with increase slightly with each overbore.
 
Mouthfulloflake

Mouthfulloflake

ISJWTA member #2
Location
NW Arkansas
every engine that I have torn down had what seemed like alot of piston 'wobble'

If it was running good enough for you to not question it before the electrical issue, I personally would fix the electrical issue, and continue to run it.
 
WFO Speedracer

WFO Speedracer

A lifetime ban is like a lifetime warranty !
Location
Alabama
The pistons are cam ground, this means they are smaller at the top than at the bottom , this is figured in as the top of the piston expands greatly when subjected to combustion heat, when the pistons are completely warmed up from engine operation the piston will be pretty much the same size from top to bottom and the wobble as you call it will be long gone.
 
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