Requires the library mod Collective.

This mod is part of The Vanilla Experience modpack and Serilum's RPG Bundle mod.
Bareback Horse Riding allows players to ride horses without having a saddle. You can take that horse you've just found with you, without having to leave it and look through dungeon chests for a saddle. By default, riding a horse without a saddle will give the player and horse the Slowness effect. You can also enable receiving damage every 15 seconds in the config. Wearing leather pants will prevent the slowness/damage, but lower its durability every time it negates. Everything is configurable and features can be toggled.

Tame functionality remains the same. And a horse can only be steered once it's friendly and tamed.

Configurable: ( how do I configure? )
shouldReceiveSlownessDuringRidingWithoutSaddle (default = true): If the player (and horse) should receive the slowness effect when riding a horse without a saddle.
shouldDamageDuringRidingWithoutSaddle (default = false): If the player should be damaged when riding a horse without a saddle.
leatherPantsNegateEffect (default = true): If wearing leather pants should prevent the player from being damaged or received slowness, if enabled, when riding without a saddle.
ticksBetweenDamage (default = 300, min 1, max 72000): How often the player should be damaged, if enabled, during riding without a saddle in ticks. 1 second = 20 ticks
halfHeartDamageAmount (default = 2, min 1, max 100): How much damage should be done to the player from riding without a saddle..
leatherPantsLoseDurabilityOnNegation (default = true): If leather pants should lose durability each time it prevents damage.

A horse can be ridden without a saddle:

It'll give the slowness effect with 'shouldReceiveSlownessDuringRidingWithoutSaddle' enabled:

Or occasional damage with 'shouldDamageDuringRidingWithoutSaddle' enabled:

Wearing leather pants will prevent the slowness/damage from happening. It does use durability:

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You may freely use this mod in any modpack, as long as the download remains hosted within the CurseForge ecosystem.

Serilum.com contains an overview and more information on all mods available.

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For issues, ideas, suggestions or anything else there is the Github repo. Thanks!