(Mackus would be the best source on that around herre)
Well, since you mentioned...
Events leading to revolution go roughly like this:
- War starts. After initial patriotic wave subsides, socialists begin to encourage strikes. No Russian equivalent of Burgfriedenspolitik / Union sacree.
- Tsar is away at front, leaving country in hands of the only person less capable than him: tsarina.
- Germans send money and logistic support to revolutionaries to destabilize Russian regime.
- Clique forms around Guchkov (a "moderate conservative"!), who wants to force tsar to abdicate in a "palace coup". If by 1917 Allied armed forces achieved any serious victory (Ottomans defeated for example), it'll be difficult to pull anyone into conspiracy, since a plan to overthrow a ruler who's winning a war would be very poorly regarded.
- Tsar's own generals and officials ambush him on a train on a way to Petrograd, and persuade him to abdicate. If tsar takes earlier train, they don't get to ambush him, and he reaches capital and gets in touch with his subordinates willing to suppress/appease the rioters.
- Germans are encouraged that Russia is collapsing, and stop Austrians (who were close to collapse themselves) from pursuing peace negotiations.
- Provisional government governs even more ineptly than tsar, while being even more devoted to stay in war. Terrified of right-wing coup, it dismisses some competent right-wing generals and officials, like Grand Duke Nicholas for example. Gives people free speech and suffrage, but doesn't give them
bread. This causes collapse of Octobrist-Kadet government, which is replaced with more radical Trudovik-Socialist one, which
keeps doing exactly the same. Kerensky formally abolishes monarchy by decree (for several months after abdication, Russia formally remined a monarchy).
- Kerensky's government alienates both right and left by the way Kornilov affair was handled. Right was angered by arrest of Kornilov and many officers, and by release and arming of Bolshevik prisoners. Left was angered by the fact that members of government were involved in conspiracy themselves, and resisted the coup only after becoming paranoid Kornilov will remove them from power.
- when Bolshevik combat squads attack government offices in Petrograd, Kerensky's government which spend last 6 months trying to appease them folds like house of cards.
Compare that with how German moderate socialist Friedrich Ebert handled German revolution: he allied with remnants of imperial establishment to suppress everyone who was more left wing than him. Russian liberals and socialist were feeding communist beast, German socialist strangled it.