Image for illustration only; it does not show the actual part or its packaging.
Honda OEM Part 90501-MK4-600 WASHER, PLAIN (8MM)
- Product Code: 90501-MK4-600
$3.80
- Genuine Honda OEM part
- New in original packaging
- Fits the models listed in the fitment chart
- Easy, no-hassle returns
This product is vehicle specific.
Find your vehicle to make sure this part fits before you order.
Ships in 4 to 9 days
Genuine Honda OEM Washer, Plain (8MM) (part number 90501-MK4-600) from the Cylinder Head diagram. It fits Honda XL600RA, XR600RA, CRF150R2A, CRF150RA, CRF150RAC, CRF150RBAC and 2 more built from 1985 to 2026.
Fits these models
- XL600RA: 1985–1987
- XR600RA: 1985–1987
- GB500A: 1990
- CB50RA: 2004
- CRF150R2A: 2009
- CRF150RA: 2012
- CRF150RAC: 2016–2026
- CRF150RBAC: 2017–2026
See the Fitment tab for the full list with model codes.
Need Help Finding the Right Part?
Not sure it fits? Ask before you order — our team will check the part for your machine.
For a faster answer, include:
Year, make and model of your machine- VIN or frame / serial number
- OEM part number or a photo of the old part
Email Us
(630) 886-1221Find your ride
Check your current ride below to confirm product compatibility.
Honda
2026
2025
2024
2023
2022
2021
2020
2019
2018
2017
1987
1986
- Honda CRF150RAC (26) MOTORCYCLE, JPN, VIN# JH2KE033-TK800001 TO JH2KE033-TK899999 CYLINDER HEAD
- Honda CRF150RBAC (26) MOTORCYCLE, JPN, VIN# JH2KE03C-TK800001 TO JH2KE03C-TK899999 CYLINDER HEAD
- Honda CRF150RAC (25) MOTORCYCLE, JPN, VIN# JH2KE033-SK700001 TO JH2KE033-SK799999 CYLINDER HEAD
- Honda CRF150RBAC (25) MOTORCYCLE, JPN, VIN# JH2KE03C-SK700001 TO JH2KE03C-SK799999 CYLINDER HEAD
- Honda CRF150RAC (24) MOTORCYCLE, JPN, VIN# JH2KE033-RK600001 CYLINDER HEAD
- Honda CRF150RBAC (24) MOTORCYCLE, JPN, VIN# JH2KE03C-RK600001 CYLINDER HEAD
- Honda CRF150RAC (23) MOTORCYCLE, JPN, VIN# JH2KE033-PK500001 TO JH2KE033-PK599999 CYLINDER HEAD
- Honda CRF150RBAC (23) MOTORCYCLE, JPN, VIN# JH2KE03C-PK500001 TO JH2KE03C-PK599999 CYLINDER HEAD
- Honda CRF150RAC (22) MOTORCYCLE, JPN, VIN# JH2KE033-NK400001 TO JH2KE033-NK499999 CYLINDER HEAD
- Honda CRF150RBAC (22) MOTORCYCLE, JPN, VIN# JH2KE03C-NK400001 TO JH2KE03C-NK499999 CYLINDER HEAD
- Honda CRF150RAC (21) MOTORCYCLE, JPN, VIN# JH2KE033-MK300001 TO JH2KE033-MK399999 CYLINDER HEAD
- Honda CRF150RBAC (21) MOTORCYCLE, JPN, VIN# JH2KE03C-MK300001 TO JH2KE03C-MK399999 CYLINDER HEAD
- Honda CRF150RAC (20) MOTORCYCLE, JPN, VIN# JH2KE033-LK200001 CYLINDER HEAD
- Honda CRF150RBAC (20) MOTORCYCLE, JPN, VIN# JH2KE03C-LK200001 CYLINDER HEAD
- Honda CRF150RAC (19) MOTORCYCLE, JPN, VIN# JH2KE033-KK100001 TO JH2KE033-KK199999 CYLINDER HEAD
- Honda CRF150RBAC (19) MOTORCYCLE, JPN, VIN# JH2KE03C-KK100001 TO JH2KE03C-KK199999 CYLINDER HEAD
- Honda CRF150RAC (18) MOTORCYCLE, JPN, VIN# JH2KE033-JK900001 TO JH2KE033-JK999999 CYLINDER HEAD
- Honda CRF150RBAC (18) MOTORCYCLE, JPN, VIN# JH2KE03C-JK900001 TO JH2KE03C-JK999999 CYLINDER HEAD
- Honda CRF150RAC (17) MOTORCYCLE, JPN, VIN# JH2KE033-HK800001 TO JH2KE033-HK899999 CYLINDER HEAD
- Honda CRF150RBAC (17) MOTORCYCLE, JPN, VIN# JH2KE03C-HK800001 TO JH2KE03C-HK899999 CYLINDER HEAD
- Honda CRF150RAC (16) CRF150R, JPN, VIN# JH2KE033-GK700001 CYLINDER HEAD
- Honda CRF150RA (12) CRF150R, JPN, VIN# JH2KE033-CK300001 CYLINDER HEAD
- Honda CRF150R2A (09) CRF150R, JPN, VIN# JH2KE033-9K200001 CYLINDER HEAD
- Honda CB50RA (04) DREAM 50R, JPN, VIN# AR02-1000206 TO AR02-1000655 CYLINDER HEAD
- Honda GB500A (90) TOURIST TROPHY, JPN, VIN# JH2PC160-LK100001 CYLINDER HEAD
- Honda XL600RA (87) MOTORCYCLE, JPN, VIN# JH2PD030-HK400002 CYLINDER HEAD
- Honda XR600RA (87) MOTORCYCLE, JPN, VIN# JH2PE040-HK200003 TO JH2PE040-HK203930 CYLINDER HEAD 85-87
- Honda XL600RA (86) MOTORCYCLE, JPN, VIN# JH2PD030-GK300002 TO JH2PD030-GK303182 CYLINDER HEAD
- Honda XR600RA (86) MOTORCYCLE, JPN, VIN# JH2PE040-GK100003 TO JH2PE040-GK104177 CYLINDER HEAD 85-87
- Honda XL600RA (85) MOTORCYCLE, JPN, VIN# JH2PD030-FK200003 TO JH2PD030-FK202357 CYLINDER HEAD
- Honda XR600RA (85) MOTORCYCLE, JPN, VIN# JH2PE040-FK000024 TO JH2PE040-FK003185 CYLINDER HEAD 85-87
Part Details
| Brand | Honda |
| Sku | 90501-MK4-600 |
| Name | WASHER, PLAIN (8MM) |
Free Shipping on Orders Over $99
Free ground shipping on US orders over $99, with tracking. Delivery time is shown before you pay, so you know when it arrives.
Support From People Who Ride
Not sure about size or fit? Ask us before you order. Our team rides too and will help you pick what suits your bike.
Genuine OEM & Trusted Brands
OEM parts for Honda, Yamaha, Kawasaki, Can-Am, Polaris and more, plus gear from makers riders trust. No no-name imports.
Parts That Fit Your Machine
Enter your machine’s type, year, make and model, and we’ll show only the parts and gear that fit it.