Wheel bearing size, YZ125

Muscle-Milk-KTM
Going over the bike today and noticed there was a bit of play in both the front and rear wheels of my 18 YZ125.

Anyone know the bearing sizes for both wheels?

Plan to get the bearings through my place of work at a considerable discount.
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kb228
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kb228 5/24/2019 5:29am
5/24/2019 5:29am
Got a set of calipers?
Paw Paw 271
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Paw Paw 271 5/24/2019 8:33am
5/24/2019 8:33am
The bearings should have numbers stamped on them for id.

Paw Paw
crc245
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crc245 5/24/2019 9:05am
5/24/2019 9:05am
Paw Paw 271 wrote:
The bearings should have numbers stamped on them for id.

Paw Paw
This.

Make sure to toss the unsealed fronts for some proper sealed bearings; Can't believe the YZ's still come like that from the factory...Very common problem

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Muscle-Milk-KTM 5/24/2019 9:59am
5/24/2019 9:59am
Paw Paw 271 wrote:
The bearings should have numbers stamped on them for id.

Paw Paw
crc245 wrote:
This.

Make sure to toss the unsealed fronts for some proper sealed bearings; Can't believe the YZ's still come like that from the factory...Very common problem
Planning to to put sealed bearings in for sure. I didn’t know if anyone knew what the bearings sizes were off hand.
Muscle-Milk-KTM 5/24/2019 1:48pm
5/24/2019 1:48pm
captmoto wrote:
Your dealer does.
They probably do but there’s no chance they’ll tell me the size as they’ll know I’ll go elsewhere to buy them. I’m not buying Koyo bearings in a Yamaha box at double the price.
Premix
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Premix 5/24/2019 2:50pm
5/24/2019 2:50pm
Pivot Works kit is 30 bucks.
cwtoyota
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cwtoyota 5/26/2019 1:36pm
5/26/2019 1:36pm Edited Date/Time 5/26/2019 1:42pm
captmoto wrote:
Your dealer does.
Muscle-Milk-KTM wrote:
They probably do but there’s no chance they’ll tell me the size as they’ll know I’ll go elsewhere to buy them. I’m not buying Koyo bearings...
They probably do but there’s no chance they’ll tell me the size as they’ll know I’ll go elsewhere to buy them. I’m not buying Koyo bearings in a Yamaha box at double the price.
Verify this information yourself and don't get pissed off at me if it's not 100% correct...

Front wheel bearing: 6904
Front wheel seal: 26/38/7

Rear wheel bearing: 60/22 2RS
Rear wheel seal: 30/44/5
Rear wheel bearing: 62/22 2RS
Rear wheel seal: 30/50/7

None of those do you any good unless you replace the seal collars at the same time. Even the tiniest groove will cause your new seals to leak, let moisture in and shorten the bearing life.

Re-grease the seals every time you take the wheel off, or at least every couple of rides.
People who aren't careful with their pressure washers can kill the seals & bearings real quick.

The Pivot Works kit comes with some very nice collars that have an internal o-ring. I use those, but their kits use Chinese bearings to keep the price low...
2
Muscle-Milk-KTM 5/27/2019 1:29am
5/27/2019 1:29am
cwtoyota wrote:
Verify this information yourself and don't get pissed off at me if it's not 100% correct... Front wheel bearing: 6904 Front wheel seal: 26/38/7 Rear wheel...
Verify this information yourself and don't get pissed off at me if it's not 100% correct...

Front wheel bearing: 6904
Front wheel seal: 26/38/7

Rear wheel bearing: 60/22 2RS
Rear wheel seal: 30/44/5
Rear wheel bearing: 62/22 2RS
Rear wheel seal: 30/50/7

None of those do you any good unless you replace the seal collars at the same time. Even the tiniest groove will cause your new seals to leak, let moisture in and shorten the bearing life.

Re-grease the seals every time you take the wheel off, or at least every couple of rides.
People who aren't careful with their pressure washers can kill the seals & bearings real quick.

The Pivot Works kit comes with some very nice collars that have an internal o-ring. I use those, but their kits use Chinese bearings to keep the price low...
Thanks for the info ?
1

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