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Ive got a EVO and was thinking of putting .020 over pistons with 10.5:1 comp. and porting and polishing the heads with now cam and carb. Has any body done similar upgrades and is there any reliability issues with running these pistons?
 

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I do not know why you want to go .020 over. Just do a new set of pistons with higher compression. I was running my 1997 evo with 11.1:1 comp for 65k before the bottom end went. Mind you I run my bike hard every day and I pull a camp trailer. The reliability is all in your right hand.

I was running Wiesco 10:1 pistons with the heads millled .065 and a .030 head gasket. 600 lift cam and roller rockers.
Now I just run an S&S 107.
 

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I did as you describe but I chose 10:1 pistons. Installed an Andrews EV72, ported and polished the heads and installed a Mikuni HSR42. Runs good and I haven't had any issues other than the starter grunting if I forget to rock the bike to get it off TDC before I start it.
 

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Put in compression releases and you will not have to rock the bike before starting. It'll save wear and tear on the starter and the battery will last longer. I also recommend the use of a battery tender every time you put the bike down for the night. dsv
 
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