Piston Balancing, how colse should i get??

[-Alex-]

I have now my all four 94mm pistons inside 0.7 grams with wristpins and rings, is it enough? pistons weights are 548.1g, 548.5g, 548.5g, 548.7g

Engine will be 2276cc that will see 7000rpm max.

[Marc]

As I said last time you asked, it'll be fine. The factory spec is 5 grams between the lightest and heaviest ROD in one engine, and 5 grams between the lightest and heaviest piston - and they don't bother to match them beyond that, so that's a possible 10 gram difference in one engine - but most are under 5 total - you're well within 1 gram (a cc of oil trapped inside a wrist pin would weigh more than the difference you have now). If you want to be incredibly anal and do a little whittlin' on the heavier pistons it could be better but it really isn't necessary.

[Bruce2]

My local balancing shop says within 1g is enough. I've driven engines he's balanced and they are silky smooth. You're done.