His godu dama destroyed a village sized meteor in an instant, so if you turn his output power to physical energy he should be able to lift hundreds of billions of tons
but he doesnt appear to be that strong physically so lets do a little thinking
that statue he lifted in sage mode was around 40-80 tons
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and that was in imperfect sage mode because after he perfected it he was able to lift about the same amount in that rhino and (throw) it high in the air that means it was light weight for him so consider him in sage mode to be able to lift 10 times that amount in max power.
so in sage mode naruto can lift about ~500 tons max
in BSM he was a lot stronger since it was sage mode and kyuubi combined and the sm was proportionate to the kyuubi chakra.
its safe to think kyuubi can lift a (small) mountain with one of its tails so half of its entire power (yang) he would at the very least be able to lift mountainchains. Combine that with sage mode, makes it even stronger.
so bsm naruto could probably lift a moderate size mountain-chain in his full power (and im actually giving him the least potential here)
rikudou naruto is a combination of yin kyuubi, part of ichibi and hachibi (maybe 20-30% each?) and some percentage of chakra from the rest of the tailed beasts + rikudou-sennin mode which is way stronger than normal sennin mode.
so the combined power of all that would probably give him enough power to lift villages (billions of tons)
the reason he wasnt able to break kaguyas spikes at first is one it was pressing against him like a spike bound to earth so it wasnt a matter of lifting but power to break, and because contrary to what some of you might believe he has to ask the bijuus for special power up, otherwise he is just in base rikudou mode. So if he wants kyuubis enormous power he has to ask for it he wouldve been able to break the ice anyway, but he didnt need to use that much energy when 5 tails could just boil it for him.
in base rikudou mode he may be 10-20 times stronger than sm thats about 5000-10000 tons
in full powered rikudou mode if he can combine all the tailed beasts power and make it physical strength like he could in bsm then he would lift billions of tons.
but for now i think bsm naruto is (physically stronger) and could lift millions of tons