This is the same old thing you see. I have been using REV PEF 107 cylinders for over 6 years and never had an issue we check and file fit rings and clean them up before install. Fastbagger 09 has them on his bike since 2009 with 210 plus hp never had an issue he beats the shit out of that bike. I feel sorry for that bike.
Yes they had an issue in the past and it was not the Nickasi from what I have seenl. It is very hard to cut Nickasil.
The rings were the problem I seen it first hand on 2006 stglide with there REV PER 124 kit. Another shop built the bike and then I re-did it for him and the bike makes 142 hp 148 tq. to this day no issues he just had it at Sturgis last year.
I my self have never seen the Nickasil flake off. Not to say it has not. But we work on many different bikes here from Metric to US and have never seen that.
Its the old saying some people had some bad experience with them I can understand the bad taste in there month's and never want to use them again.
Again we have seen stock cylinders go bad just as fast and crack spigots. etc.,
Not here to fight with anyone just what I see here..
Here is ATTCH of a Spigot on a 107
Here Is ATT of a Spigot on a 88/96" Avg give or take
Sorry I dont have one here of a Stock 103 to show
Revolution Performance uses a big bore kit that has all aluminum cylinders with "nickel silicon carbide" plating. The say it's stronger than cast iron and lasts three to four times longer. Has anyone ever installed one of their kits? If so, what are your thoughts, good or bad.