971231 Ball 3/8" diameter oil pump
incl. VAT
Chapter members save 15% · Sign in for member pricing
Estimated delivery: 3–15 working days
Authorised
Iron City Dealer
14-Day Returns
Easy & hassle-free
Secure Checkout
256-bit encryption
Free UK Delivery
On orders over £100
Specifications
- Brand
- MCS
- Part Number
- 971231
- OEM Reference
- 8866
- Pack Quantity
- Pack of 25
- Category
- Oil Pumps
- VAT Rate
- 20%
About This Product
These 3/8" diameter steel balls are the heart of the check valve system in vintage Harley oil pumps. They are essential for preventing oil from wet-sumping into the crankcase when the bike is sitting. This set fits 1937 to 1973 45" Flathead models and serves as a direct replacement for OEM 8866. MCS provides these in a bulk pack of 25, which is perfect for the shop since these are easily lost during cleaning or can become pitted over time. Using a fresh ball ensures a perfect seal against the seat, maintaining the health of your 45's lubrication circuit.
Manufacturer part number: 971231.
Fitment
37-73 45" Flathead
Related Products
View all →
More from MCS
View all →
Who are we? Leeds Harley-Davidson - Iron City Motorcycles
This product is fulfilled by Iron City Motorcycles, Leeds' authorised Harley-Davidson® dealer, serving the UK with a full range of Genuine Motorclothes®, dealer merchandise, and official Harley-Davidson parts & accessories — available for UK and international delivery.
From OEM Parts to retro lifestyle wear to aftermarket stockits we have what you need to keep you riding all year round.
Use our official OEM parts finder to browse our full Genuine Harley-Davidson® Parts and our associated approved aftermarket catalogues.