diff --git a/substrate/bin/node-template/runtime/src/lib.rs b/substrate/bin/node-template/runtime/src/lib.rs
index 9612394cc7fbf88e2abb5e735248df74886d6b72..3d5b91f6574cb24b76d81ef8b59db5f65e829468 100644
--- a/substrate/bin/node-template/runtime/src/lib.rs
+++ b/substrate/bin/node-template/runtime/src/lib.rs
@@ -211,6 +211,8 @@ impl pallet_grandpa::Trait for Runtime {
 	)>>::IdentificationTuple;
 
 	type HandleEquivocation = ();
+
+	type WeightInfo = ();
 }
 
 parameter_types! {
diff --git a/substrate/bin/node/runtime/src/lib.rs b/substrate/bin/node/runtime/src/lib.rs
index 9c2c3beb7790e76146743127b84b980ed4c1945a..8129fec68ada43b7a9897b4f93e3fc1c546f413e 100644
--- a/substrate/bin/node/runtime/src/lib.rs
+++ b/substrate/bin/node/runtime/src/lib.rs
@@ -311,6 +311,8 @@ impl pallet_babe::Trait for Runtime {
 
 	type HandleEquivocation =
 		pallet_babe::EquivocationHandler<Self::KeyOwnerIdentification, Offences>;
+
+	type WeightInfo = ();
 }
 
 parameter_types! {
@@ -782,6 +784,8 @@ impl pallet_grandpa::Trait for Runtime {
 
 	type HandleEquivocation =
 		pallet_grandpa::EquivocationHandler<Self::KeyOwnerIdentification, Offences>;
+
+	type WeightInfo = ();
 }
 
 parameter_types! {
diff --git a/substrate/frame/babe/src/default_weights.rs b/substrate/frame/babe/src/default_weights.rs
new file mode 100644
index 0000000000000000000000000000000000000000..a0e13781961cc0a5ad37c8d5b50801542a582657
--- /dev/null
+++ b/substrate/frame/babe/src/default_weights.rs
@@ -0,0 +1,47 @@
+// This file is part of Substrate.
+
+// Copyright (C) 2020 Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! Default weights for the Babe Pallet
+//! This file was not auto-generated.
+
+use frame_support::weights::{
+	Weight, constants::{WEIGHT_PER_MICROS, WEIGHT_PER_NANOS, RocksDbWeight as DbWeight},
+};
+
+impl crate::WeightInfo for () {
+	fn report_equivocation(validator_count: u32) -> Weight {
+		// we take the validator set count from the membership proof to
+		// calculate the weight but we set a floor of 100 validators.
+		let validator_count = validator_count.max(100) as u64;
+
+		// worst case we are considering is that the given offender
+		// is backed by 200 nominators
+		const MAX_NOMINATORS: u64 = 200;
+
+		// checking membership proof
+		(35 * WEIGHT_PER_MICROS)
+			.saturating_add((175 * WEIGHT_PER_NANOS).saturating_mul(validator_count))
+			.saturating_add(DbWeight::get().reads(5))
+			// check equivocation proof
+			.saturating_add(110 * WEIGHT_PER_MICROS)
+			// report offence
+			.saturating_add(110 * WEIGHT_PER_MICROS)
+			.saturating_add(25 * WEIGHT_PER_MICROS * MAX_NOMINATORS)
+			.saturating_add(DbWeight::get().reads(14 + 3 * MAX_NOMINATORS))
+			.saturating_add(DbWeight::get().writes(10 + 3 * MAX_NOMINATORS))
+	}
+}
diff --git a/substrate/frame/babe/src/lib.rs b/substrate/frame/babe/src/lib.rs
index 2c1b2b16efc07af913e232c57126eb51512c048c..3f13fe7e03002c8a692460d34d0b7d8da29d524d 100644
--- a/substrate/frame/babe/src/lib.rs
+++ b/substrate/frame/babe/src/lib.rs
@@ -51,6 +51,7 @@ use sp_inherents::{InherentData, InherentIdentifier, MakeFatalError, ProvideInhe
 pub use sp_consensus_babe::{AuthorityId, PUBLIC_KEY_LENGTH, RANDOMNESS_LENGTH, VRF_OUTPUT_LENGTH};
 
 mod equivocation;
+mod default_weights;
 
 #[cfg(any(feature = "runtime-benchmarks", test))]
 mod benchmarking;
@@ -102,6 +103,12 @@ pub trait Trait: pallet_timestamp::Trait {
 	/// `()`) you must use this pallet's `ValidateUnsigned` in the runtime
 	/// definition.
 	type HandleEquivocation: HandleEquivocation<Self>;
+
+	type WeightInfo: WeightInfo;
+}
+
+pub trait WeightInfo {
+	fn report_equivocation(validator_count: u32) -> Weight;
 }
 
 /// Trigger an epoch change, if any should take place.
@@ -256,7 +263,7 @@ decl_module! {
 		/// the equivocation proof and validate the given key ownership proof
 		/// against the extracted offender. If both are valid, the offence will
 		/// be reported.
-		#[weight = weight_for::report_equivocation::<T>(key_owner_proof.validator_count())]
+		#[weight = <T as Trait>::WeightInfo::report_equivocation(key_owner_proof.validator_count())]
 		fn report_equivocation(
 			origin,
 			equivocation_proof: EquivocationProof<T::Header>,
@@ -279,7 +286,7 @@ decl_module! {
 		/// block authors will call it (validated in `ValidateUnsigned`), as such
 		/// if the block author is defined it will be defined as the equivocation
 		/// reporter.
-		#[weight = weight_for::report_equivocation::<T>(key_owner_proof.validator_count())]
+		#[weight = <T as Trait>::WeightInfo::report_equivocation(key_owner_proof.validator_count())]
 		fn report_equivocation_unsigned(
 			origin,
 			equivocation_proof: EquivocationProof<T::Header>,
@@ -296,38 +303,6 @@ decl_module! {
 	}
 }
 
-mod weight_for {
-	use frame_support::{
-		traits::Get,
-		weights::{
-			constants::{WEIGHT_PER_MICROS, WEIGHT_PER_NANOS},
-			Weight,
-		},
-	};
-
-	pub fn report_equivocation<T: super::Trait>(validator_count: u32) -> Weight {
-		// we take the validator set count from the membership proof to
-		// calculate the weight but we set a floor of 100 validators.
-		let validator_count = validator_count.max(100) as u64;
-
-		// worst case we are considering is that the given offender
-		// is backed by 200 nominators
-		const MAX_NOMINATORS: u64 = 200;
-
-		// checking membership proof
-		(35 * WEIGHT_PER_MICROS)
-			.saturating_add((175 * WEIGHT_PER_NANOS).saturating_mul(validator_count))
-			.saturating_add(T::DbWeight::get().reads(5))
-			// check equivocation proof
-			.saturating_add(110 * WEIGHT_PER_MICROS)
-			// report offence
-			.saturating_add(110 * WEIGHT_PER_MICROS)
-			.saturating_add(25 * WEIGHT_PER_MICROS * MAX_NOMINATORS)
-			.saturating_add(T::DbWeight::get().reads(14 + 3 * MAX_NOMINATORS))
-			.saturating_add(T::DbWeight::get().writes(10 + 3 * MAX_NOMINATORS))
-	}
-}
-
 impl<T: Trait> RandomnessT<<T as frame_system::Trait>::Hash> for Module<T> {
 	/// Some BABE blocks have VRF outputs where the block producer has exactly one bit of influence,
 	/// either they make the block or they do not make the block and thus someone else makes the
diff --git a/substrate/frame/babe/src/mock.rs b/substrate/frame/babe/src/mock.rs
index 925e301dea863aad38cbd468f742854a14d2c126..978740a5ce00f19169c3ccbc6fc06de1ea6c1318 100644
--- a/substrate/frame/babe/src/mock.rs
+++ b/substrate/frame/babe/src/mock.rs
@@ -248,6 +248,7 @@ impl Trait for Test {
 	)>>::IdentificationTuple;
 
 	type HandleEquivocation = super::EquivocationHandler<Self::KeyOwnerIdentification, Offences>;
+	type WeightInfo = ();
 }
 
 pub type Balances = pallet_balances::Module<Test>;
diff --git a/substrate/frame/babe/src/tests.rs b/substrate/frame/babe/src/tests.rs
index 66229e5a6c8a10a8afbecebd97eb2cd1cc2bfec3..6cfa7e41dff88af8b8f4036922bfa9cbb2ea93ff 100644
--- a/substrate/frame/babe/src/tests.rs
+++ b/substrate/frame/babe/src/tests.rs
@@ -593,7 +593,7 @@ fn report_equivocation_has_valid_weight() {
 	// but there's a lower bound of 100 validators.
 	assert!(
 		(1..=100)
-			.map(weight_for::report_equivocation::<Test>)
+			.map(<Test as Trait>::WeightInfo::report_equivocation)
 			.collect::<Vec<_>>()
 			.windows(2)
 			.all(|w| w[0] == w[1])
@@ -603,7 +603,7 @@ fn report_equivocation_has_valid_weight() {
 	// with every extra validator.
 	assert!(
 		(100..=1000)
-			.map(weight_for::report_equivocation::<Test>)
+			.map(<Test as Trait>::WeightInfo::report_equivocation)
 			.collect::<Vec<_>>()
 			.windows(2)
 			.all(|w| w[0] < w[1])
diff --git a/substrate/frame/grandpa/src/default_weights.rs b/substrate/frame/grandpa/src/default_weights.rs
new file mode 100644
index 0000000000000000000000000000000000000000..4893fc2cf18600eebf9a38159546e740017f66f3
--- /dev/null
+++ b/substrate/frame/grandpa/src/default_weights.rs
@@ -0,0 +1,54 @@
+// This file is part of Substrate.
+
+// Copyright (C) 2020 Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! Default weights for the GRANDPA Pallet
+//! This file was not auto-generated.
+
+use frame_support::weights::{
+	Weight, constants::{WEIGHT_PER_MICROS, WEIGHT_PER_NANOS, RocksDbWeight as DbWeight},
+};
+
+impl crate::WeightInfo for () {
+	fn report_equivocation(validator_count: u32) -> Weight {
+		// we take the validator set count from the membership proof to
+		// calculate the weight but we set a floor of 100 validators.
+		let validator_count = validator_count.max(100) as u64;
+
+		// worst case we are considering is that the given offender
+		// is backed by 200 nominators
+		const MAX_NOMINATORS: u64 = 200;
+
+		// checking membership proof
+		(35 * WEIGHT_PER_MICROS)
+			.saturating_add((175 * WEIGHT_PER_NANOS).saturating_mul(validator_count))
+			.saturating_add(DbWeight::get().reads(5))
+			// check equivocation proof
+			.saturating_add(95 * WEIGHT_PER_MICROS)
+			// report offence
+			.saturating_add(110 * WEIGHT_PER_MICROS)
+			.saturating_add(25 * WEIGHT_PER_MICROS * MAX_NOMINATORS)
+			.saturating_add(DbWeight::get().reads(14 + 3 * MAX_NOMINATORS))
+			.saturating_add(DbWeight::get().writes(10 + 3 * MAX_NOMINATORS))
+			// fetching set id -> session index mappings
+			.saturating_add(DbWeight::get().reads(2))
+	}
+
+	fn note_stalled() -> Weight {
+		(3 * WEIGHT_PER_MICROS)
+			.saturating_add(DbWeight::get().writes(1))
+	}
+}
diff --git a/substrate/frame/grandpa/src/lib.rs b/substrate/frame/grandpa/src/lib.rs
index 893bfc0dd5b27517b33f6dace6352439db34ad79..9a592ab9266f1e3156c06adebe478d94f3921981 100644
--- a/substrate/frame/grandpa/src/lib.rs
+++ b/substrate/frame/grandpa/src/lib.rs
@@ -41,7 +41,7 @@ use fg_primitives::{
 };
 use frame_support::{
 	decl_error, decl_event, decl_module, decl_storage, dispatch::DispatchResultWithPostInfo,
-	storage, traits::KeyOwnerProofSystem, weights::Pays, Parameter,
+	storage, traits::KeyOwnerProofSystem, weights::{Pays, Weight}, Parameter,
 };
 use frame_system::{ensure_none, ensure_root, ensure_signed};
 use pallet_finality_tracker::OnFinalizationStalled;
@@ -54,6 +54,7 @@ use sp_session::{GetSessionNumber, GetValidatorCount};
 use sp_staking::SessionIndex;
 
 mod equivocation;
+mod default_weights;
 
 #[cfg(any(feature = "runtime-benchmarks", test))]
 mod benchmarking;
@@ -97,6 +98,14 @@ pub trait Trait: frame_system::Trait {
 	/// `()`) you must use this pallet's `ValidateUnsigned` in the runtime
 	/// definition.
 	type HandleEquivocation: HandleEquivocation<Self>;
+
+	/// Weights for this pallet.
+	type WeightInfo: WeightInfo;
+}
+
+pub trait WeightInfo {
+	fn report_equivocation(validator_count: u32) -> Weight;
+	fn note_stalled() -> Weight;
 }
 
 /// A stored pending change, old format.
@@ -242,7 +251,7 @@ decl_module! {
 		/// equivocation proof and validate the given key ownership proof
 		/// against the extracted offender. If both are valid, the offence
 		/// will be reported.
-		#[weight = weight_for::report_equivocation::<T>(key_owner_proof.validator_count())]
+		#[weight = T::WeightInfo::report_equivocation(key_owner_proof.validator_count())]
 		fn report_equivocation(
 			origin,
 			equivocation_proof: EquivocationProof<T::Hash, T::BlockNumber>,
@@ -266,7 +275,7 @@ decl_module! {
 		/// block authors will call it (validated in `ValidateUnsigned`), as such
 		/// if the block author is defined it will be defined as the equivocation
 		/// reporter.
-		#[weight = weight_for::report_equivocation::<T>(key_owner_proof.validator_count())]
+		#[weight = T::WeightInfo::report_equivocation(key_owner_proof.validator_count())]
 		fn report_equivocation_unsigned(
 			origin,
 			equivocation_proof: EquivocationProof<T::Hash, T::BlockNumber>,
@@ -288,7 +297,7 @@ decl_module! {
 		/// forced change will not be re-orged (e.g. 1000 blocks). The GRANDPA voters
 		/// will start the new authority set using the given finalized block as base.
 		/// Only callable by root.
-		#[weight = weight_for::note_stalled::<T>()]
+		#[weight = T::WeightInfo::note_stalled()]
 		fn note_stalled(
 			origin,
 			delay: T::BlockNumber,
@@ -364,45 +373,6 @@ decl_module! {
 	}
 }
 
-mod weight_for {
-	use frame_support::{
-		traits::Get,
-		weights::{
-			constants::{WEIGHT_PER_MICROS, WEIGHT_PER_NANOS},
-			Weight,
-		},
-	};
-
-	pub fn report_equivocation<T: super::Trait>(validator_count: u32) -> Weight {
-		// we take the validator set count from the membership proof to
-		// calculate the weight but we set a floor of 100 validators.
-		let validator_count = validator_count.max(100) as u64;
-
-		// worst case we are considering is that the given offender
-		// is backed by 200 nominators
-		const MAX_NOMINATORS: u64 = 200;
-
-		// checking membership proof
-		(35 * WEIGHT_PER_MICROS)
-			.saturating_add((175 * WEIGHT_PER_NANOS).saturating_mul(validator_count))
-			.saturating_add(T::DbWeight::get().reads(5))
-			// check equivocation proof
-			.saturating_add(95 * WEIGHT_PER_MICROS)
-			// report offence
-			.saturating_add(110 * WEIGHT_PER_MICROS)
-			.saturating_add(25 * WEIGHT_PER_MICROS * MAX_NOMINATORS)
-			.saturating_add(T::DbWeight::get().reads(14 + 3 * MAX_NOMINATORS))
-			.saturating_add(T::DbWeight::get().writes(10 + 3 * MAX_NOMINATORS))
-			// fetching set id -> session index mappings
-			.saturating_add(T::DbWeight::get().reads(2))
-	}
-
-	pub fn note_stalled<T: super::Trait>() -> Weight {
-		(3 * WEIGHT_PER_MICROS)
-			.saturating_add(T::DbWeight::get().writes(1))
-	}
-}
-
 impl<T: Trait> Module<T> {
 	/// Get the current set of authorities, along with their respective weights.
 	pub fn grandpa_authorities() -> AuthorityList {
diff --git a/substrate/frame/grandpa/src/mock.rs b/substrate/frame/grandpa/src/mock.rs
index 7358d50e26070c12b77b9f389ebc73dab1d2601f..7aeab445075334d07a290b3e589a4441d00c7f75 100644
--- a/substrate/frame/grandpa/src/mock.rs
+++ b/substrate/frame/grandpa/src/mock.rs
@@ -262,6 +262,8 @@ impl Trait for Test {
 	)>>::IdentificationTuple;
 
 	type HandleEquivocation = super::EquivocationHandler<Self::KeyOwnerIdentification, Offences>;
+
+	type WeightInfo = ();
 }
 
 mod pallet_grandpa {
diff --git a/substrate/frame/grandpa/src/tests.rs b/substrate/frame/grandpa/src/tests.rs
index 951b28df57ec9a4afea9eaf50c3847746d85b03b..4916808fe000f3f9919cb9c2f6668f40d2039477 100644
--- a/substrate/frame/grandpa/src/tests.rs
+++ b/substrate/frame/grandpa/src/tests.rs
@@ -850,7 +850,7 @@ fn report_equivocation_has_valid_weight() {
 	// but there's a lower bound of 100 validators.
 	assert!(
 		(1..=100)
-			.map(weight_for::report_equivocation::<Test>)
+			.map(<Test as Trait>::WeightInfo::report_equivocation)
 			.collect::<Vec<_>>()
 			.windows(2)
 			.all(|w| w[0] == w[1])
@@ -860,7 +860,7 @@ fn report_equivocation_has_valid_weight() {
 	// with every extra validator.
 	assert!(
 		(100..=1000)
-			.map(weight_for::report_equivocation::<Test>)
+			.map(<Test as Trait>::WeightInfo::report_equivocation)
 			.collect::<Vec<_>>()
 			.windows(2)
 			.all(|w| w[0] < w[1])
diff --git a/substrate/test-utils/runtime/src/lib.rs b/substrate/test-utils/runtime/src/lib.rs
index a67d2455be18d03ea602055c6953821098d7dc03..44136546814b4ef2d15124cc4ca7db74af20adca 100644
--- a/substrate/test-utils/runtime/src/lib.rs
+++ b/substrate/test-utils/runtime/src/lib.rs
@@ -492,6 +492,8 @@ impl pallet_babe::Trait for Runtime {
 	)>>::IdentificationTuple;
 
 	type HandleEquivocation = ();
+
+	type WeightInfo = ();
 }
 
 /// Adds one to the given input and returns the final result.