How To Put A Chain On A Bike Without Tool. How to shorten a bike chain with no special tools. How to put a chain back on a mountain bike.

However you are not supposed to remove the rivet totally from the link. You could try using a simple chain breakingRivet tool to break the chain at one point while still keeping the pin in the link and then put the chain on and use the tool again to push the pin in and join the chain like that. But there will come a time when the chain would suddenly slip off from the drivetrain.
Back off the chain tool all of the way so that you can place the freshly connected link into the inner slot.
Now tighten the chain tools pin until it connects with the chain pin and tighten it just barely about a quarter of a turn. But there will come a time when the chain would suddenly slip off from the drivetrain. You may need to use a hammer or wrench to tap the link so that it pops out allowing the chain to separate. Then keep some of the chains to the ground by pedals to the side facing the seat.
